阅读说明：本技术 软质金属承接用保护材料 (Protective material for receiving soft metal ) 是由 渡边阳平 于 2020-09-21 设计创作，主要内容包括：本发明的课题在于提供一种软质金属承接用保护材料,其即使在高温软质金属材料进行滑动的情况下也能够防止软质金属材料受损,且耐磨损性良好。解决方案在于：一种软质金属承接用保护材料,其包括布帛,该布帛具有高温的软质金属材料进行滑动的面,上述布帛为包含耐热性有机纤维的有机纤维的织物。(The invention provides a protective material for receiving soft metal, which can prevent the soft metal material from being damaged even if the soft metal material at high temperature slides and has good abrasion resistance. The solution is as follows: a protective material for soft metal reception, comprising a fabric having a surface on which a high-temperature soft metal material slides, wherein the fabric is a woven fabric of organic fibers including heat-resistant organic fibers.)

1. A protective material for receiving soft metal is characterized in that:

which comprises a fabric having a surface on which a high-temperature soft metal material slides,

the fabric is a woven fabric of organic fibers including heat-resistant organic fibers.

2. A soft metal receiving protective material according to claim 1, wherein:

the heat-resistant organic fiber has a heat-resistant temperature of 200 ℃ or higher.

3. The soft metal receiving protective material according to claim 1 or 2, wherein: the heat resistant organic fiber comprises a Polyparaphenylene Benzobisoxazole (PBO) fiber.

4. A soft metal receiving protective material according to claim 3, wherein:

the heat-resistant organic fiber contains at least 1 selected from the group consisting of an aramid fiber, a cellulose fiber, a polyarylate fiber, a polyphenylene sulfide (PPS) fiber, a polyether ether ketone (PEEK) fiber, a polyimide fiber, and a fluorine fiber.

5. The soft metal receiving protective material according to any one of claims 1 to 4, wherein: the weight of the fabric per unit area is 150-8000 g/m²。

6. The soft metal receiving protective material according to any one of claims 1 to 5, wherein: the thickness of the organic fiber is 150-8000 dtex.

7. The soft metal receiving protective material according to any one of claims 1 to 6, wherein: the fabric is cylindrical.

8. The soft metal receiving protective material according to any one of claims 1 to 7, wherein: the soft metal material is aluminum.

9. The soft metal receiving protective material according to any one of claims 1 to 8, wherein: it is used for extrusion molding.

Technical Field

The present invention relates to a protective material for receiving a soft metal, which is provided, for example, in a portion where a high-temperature soft metal material immediately after extrusion molding slides when the soft metal material is conveyed.

Background

Conventionally, a molded article of a high-temperature soft metal immediately after extrusion molding is generally carried on a conveyor belt or is carried by sliding on an upper surface of a protective material for receiving a soft metal such as felt (felt) provided discontinuously in the carrying direction (patent documents 1 and 2).

Patent document 1 discloses a heat-resistant conveyor belt for conveyance, which is made of a low stretch fabric in which an upper layer and a lower layer are integrated by needle punching (needle punch), wherein the upper layer is made of a nonwoven fabric of synthetic resin fibers only, and the lower layer is made of a base fabric made of warp yarns that cross over 3 or more continuous weft yarns or warp yarns that are hidden under 3 or more continuous weft yarns. By using such a cloth, the elongation is lower than that of conventional products, and idling of the conveyance roller can be suppressed.

Patent document 2 discloses a heat-resistant cushioning material characterized in that heat-resistant organic fiber layers are laminated in a web state on both surfaces of an inorganic fiber layer to form a structure having 3 or more layers, and the structure is formed by integrating the layers by needle punching. The heat-resistant cushioning material is used as a gasket or receiving material gasket for preventing damage to an aluminum product such as an aluminum extrusion molded product or a coil, and since the surface layer in contact with the aluminum extrusion molded product or the like is a heat-resistant organic fiber layer, it is considered that the shedding of fibers due to abrasion can be prevented. The web described in patent document 2 is considered to be a material in which fibers in a previous stage of manufacturing a nonwoven fabric are laminated and spread into a sheet shape.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-203497

Patent document 2: japanese patent laid-open publication No. 2017-95840

Disclosure of Invention

Problems to be solved by the invention

However, according to the study of the inventors of the present invention, it has been found that if the surface layer is in the form of a nonwoven fabric as described in patent document 1 or in the form of a net as described in patent document 2, although damage to the aluminum product can be prevented to some extent, particularly when a high-temperature soft metal material slides along the surface layer, the nonwoven fabric is easily abraded and the abrasion resistance is insufficient.

Accordingly, an object of the present invention is to provide a protective material for receiving a soft metal, which can prevent the soft metal material from being damaged even when the soft metal material slides at a high temperature, and which has excellent wear resistance.

Means for solving the problems

The present inventors have conducted intensive studies to solve the above problems. As a result, it has been found that the above problems can be solved by using a woven fabric comprising an organic fiber containing a heat-resistant organic fiber.

The present invention relates to a protective material for soft metal reception, which comprises a fabric having a surface on which a high-temperature soft metal material slides, wherein the fabric is a woven fabric of organic fibers including heat-resistant organic fibers.

In the embodiment of the present invention, the heat-resistant temperature of the heat-resistant organic fiber may be 200 ℃.

In an embodiment of the present invention, the heat-resistant organic fiber may include a Polyparaphenylene Benzobisoxazole (PBO) fiber. In this case, the heat-resistant organic fiber may further include at least 1 selected from the group consisting of an aramid fiber, a cellulose fiber, a polyarylate fiber, a polyphenylene sulfide (PPS) fiber, a polyether ether ketone (PEEK) fiber, a polyimide fiber, and a fluorine fiber.

In an embodiment of the present invention, the weight per unit area of the woven fabric may be 150 to 8000g/m²。

In an embodiment of the present invention, the thickness of the organic fiber may be 150 to 8000 dtex.

In an embodiment of the present invention, the fabric may have a cylindrical shape.

In an embodiment of the present invention, the soft metal material may be aluminum.

The embodiment of the present invention can be used for extrusion molding.

ADVANTAGEOUS EFFECTS OF INVENTION

The protective material for receiving a soft metal according to the present invention can prevent the soft metal material from being damaged even when the high-temperature soft metal material slides along the surface thereof, and has excellent wear resistance.

Detailed Description

The soft metal receiving protective material according to the embodiment of the present invention is formed of a fabric having a surface on which a high-temperature soft metal material slides. The fabric is a woven fabric of organic fibers including heat-resistant organic fibers.

In this way, by using a woven fabric as the fabric constituting the soft metal receiving protective material, unlike the case of a nonwoven fabric, fibers are regularly entangled, and therefore, even when the soft metal material slides, fuzzing of the fibers constituting the woven fabric can be suppressed; since the nonwoven fabric (including felt) used in patent document 1 or patent document 2 can be designed to have a high density, it is considered that abrasion is less likely to occur and abrasion resistance is improved. Further, since the organic fiber includes a heat-resistant organic fiber, durability of the organic fiber with respect to the high-temperature soft metal material is improved, and it is considered that good abrasion resistance can be obtained by a synergistic effect with the feature of being formed in a woven fabric form. Further, since the fabric constituting the fabric is mainly composed of organic fibers, it is considered that the aggressiveness against the soft metal material can be suppressed and the damage can be prevented.

The fabric is formed by interlacing warp and weft yarns with each other. The weave of the fabric is not particularly limited, and various weaves can be used. For example, a double weave, a cross weave (からみ), and the like can be cited. The single weave includes a plain weave, a twill weave, and a satin weave, a modified weave thereof, a mixed weave in which the plain weave and the modified weave are mixed, a weave independent of the plain weave and the modified weave, and a rib weave in which a pattern is raised. The double weave is a weave in which one or both of the warp and weft yarns are overlapped by two or more times to form multiple layers when the cross section of the fabric is observed, and the surface of the fabric has the same weave as the above-mentioned single weave, and examples thereof include a double weave such as a double warp, a double weft, a double warp and weft, a triple warp and weft, a quadruple warp, a quintuple weft, and a multiple warp and a quintuple weft. Examples of the leno structure include a leno structure ( coated article), a yarn structure, and the like.

The organic fiber may contain any heat-resistant organic fiber, and may contain an organic fiber other than the heat-resistant organic fiber. The heat-resistant organic fiber preferably has a heat-resistant temperature of 200 ℃ or higher, more preferably 400 ℃ or higher, and still more preferably 500 ℃ or higher. The heat resistant temperature refers to a thermal decomposition temperature or a melting point.

The heat-resistant organic fiber may be any material having such heat resistance, and examples thereof include Polyparaphenylene Benzobisoxazole (PBO) fiber, aramid fiber, cellulose fiber, polyarylate fiber, polyphenylene sulfide (PPS) fiber, polyether ether ketone (PEEK) fiber, polyimide fiber, and fluorine fiber. Among these, the heat-resistant organic fibers preferably contain PBO fibers, and more preferably solely PBO fibers, from the viewpoint of heat resistance, abrasion resistance, and attack on soft metal materials. Since PBO fibers have extremely excellent heat resistance compared to other organic fibers, for example, a woven fabric composed of PBO fibers alone having high heat resistance is suitable for sliding the soft metal material immediately after extrusion molding. On the other hand, since the soft metal material is cooled during transportation, it is not necessary to use PBO fibers alone in the portions where the cooled soft metal material slides as compared with the portions immediately after molding. In such a region, the heat-resistant organic fiber used for the fabric may be a combination of PBO fiber and a heat-resistant organic fiber other than PBO fiber. The heat-resistant organic fiber other than the PBO fiber preferably contains at least 1 selected from the group consisting of an aramid fiber, a cellulose fiber, a polyarylate fiber, a PPS fiber, a PEEK fiber, a polyimide fiber, and a fluorine fiber. Commercially available products of these heat-resistant organic fibers can be used. For example, ZYLON (registered trademark) manufactured by toyobo co. The aramid fiber may be a para-aramid fiber or a meta-aramid fiber, and examples of the para-aramid fiber include polyparaphenylene terephthalamide fiber (DU PONT-TORAY co., ltd., Kevlar (registered trademark)), delson (registered trademark), and examples of the meta-aramid fiber include polyparaphenylene terephthalamide fiber (DU PONT-TORAY co., ltd., Nomex (registered trademark)), delrin (registered trademark), and Conex (registered trademark). Examples of the PPS fiber include Torcon (registered trademark) manufactured by toyo corporation. Examples of the polyarylate fiber include KURARAY co., ltd, Vectran (registered trademark), KB SEIREN corporation, and Zxion (registered trademark). Among these, cellulose fibers are fibers obtained from a raw material derived from cellulose, such as rayon (rayon), cuprammonium fiber, Lyocell, and acetate fiber.

The organic fiber preferably contains a heat-resistant organic fiber, more preferably only a heat-resistant organic fiber, but may contain other organic fibers than the heat-resistant organic fiber depending on the use or the like. Examples of such fibers include silk, wool, and polyethylene fibers.

The form of the organic fiber is not particularly limited, and may be appropriately determined depending on the type of the fiber to be used, the number of fiber types, and the like. The organic fiber may be in the form of a spun yarn of a filament (long fiber) or a Staple (Staple). The filament and the spun yarn may be single yarns, twisted yarns obtained by plying and twisting a plurality of single yarns, or plied yarns obtained by plying and plying only a plurality of single yarns. The degree of twisting of the twisted yarn is not particularly limited. When a plurality of filaments and/or spun yarns are used, twisted yarns are preferred from the viewpoint of abrasion resistance. In the case where a yarn is formed by combining a plurality of fiber types, a blended yarn obtained by spinning using staple fibers of a plurality of types of fibers may be used, or a twisted yarn obtained by twisting a plurality of types of filaments and/or blended yarns may be used.

The thickness of the organic fiber may be appropriately determined in consideration of the type of the fiber, but is preferably 150 to 8000dtex from the viewpoint of abrasion resistance and prevention of damage to the soft metal. Among them, for example, in the case where the organic fiber is a PBO fiber, it is preferably 150 to 600dtex, and in the case where the organic fiber is a blended yarn of a PBO fiber and another organic fiber, it is preferably 5000 to 8000 dtex.

The basis weight of the fabric may be determined by the form of the weave, the thickness of the organic fiber, and the applicationAnd the like, but from the viewpoint of abrasion resistance, prevention of damage to soft metal, and design of fabric shape, it is preferably 150 to 8000g/m²More preferably 150 to 6000g/m²More preferably 150 to 5000g/m². In addition, when a single weave is adopted as the weave of the fabric, the weave is preferably 350 to 800g/m²When the tissue is a double tissue, it is preferably 2500 to 8000g/m²More preferably 2500 to 4500g/m². The thickness of the woven fabric may be appropriately determined depending on the form of the woven fabric, the type of the organic fiber, the application, and the like, but is preferably 0.4 to 15mm from the viewpoint of abrasion resistance and prevention of damage to the soft metal. The thickness of the PBO fiber is more preferably 0.4 to 1mm in the case of single weave of the PBO fiber, more preferably 0.8 to 3.5mm in the case of single weave of the blended yarn, and more preferably 3 to 15mm in the case of overlapping weave of the blended yarn. The thickness of the fabric can be measured using a constant pressure caliper.

The shape and structure of the fabric may be appropriately determined depending on the application, and may be a flat plate shape, a cylindrical shape, a rectangular parallelepiped, a cube, or other structures. The fabric may be formed of one woven fabric or a plurality of woven fabrics stacked one on another. Examples of the material include, but are not limited to, a rectangular parallelepiped or a cube obtained by stacking a plurality of flat woven fabrics, a material obtained by concentrically stacking a plurality of cylindrical woven fabrics, a material obtained by winding a sheet-like long woven fabric into a roll to form a cylinder, a material obtained by folding a sheet-like woven fabric into a flat shape as appropriate, or a material obtained by folding a rectangular parallelepiped or a cube. In the case of a structure in which a plurality of woven fabrics are combined, these may or may not be integrated. In addition, when a plurality of the soft metal materials are combined, if the portion in contact with the soft metal material is deteriorated by use, the deteriorated woven fabric is removed, whereby the non-deteriorated woven fabric can be used as a surface and can be used continuously. In addition, in the case of combining a plurality of fabrics, the kinds of fibers constituting the respective fabrics may be the same or different.

Such a soft metal receiving protective material may be used by being provided on a surface of a conventional soft metal receiving protective material or the like. This application method is effective for reducing the production cost of a soft metal molded article by using a fabric of a single weave of PBO fibers as a fabric, for example, to reduce the amount of expensive PBO fibers used, and to prevent damage to the soft metal material of the soft metal receiving protective material and to improve abrasion resistance.

The fabric formed of the woven fabric of the predetermined organic fiber as described above is suitable as a protective material for receiving soft metal used when transporting a soft metal material having a high temperature. Particularly, the soft metal receiving protective material is suitable for the case where the soft metal material having a high temperature is carried along the surface of the fabric. The material of such a soft metal material may be a metal that is easily deformable and has high ductility. Examples thereof include metals such as aluminum, magnesium, indium, lead, tin, copper, gold, and silver, and alloys such as brass. Among them, aluminum, which is easily damaged, is particularly effective. Further, since the high-temperature soft metal material is made to slide along the surface of the fabric, a material having a shape that is long in the sliding direction is effective for the soft metal material. In addition, such a long soft metal material is suitable for extrusion molding applications as a soft metal material from the viewpoint of sliding in a high-temperature state. For example, the present invention is suitably used as a protective material for a sliding portion that slides an extrusion molded product of a soft metal material, which is provided in a tank, a starting table (initial table), an output table (run-out table), a lift arm, a cooling table (cooling table), or the like, which is a post-equipment of an extrusion molding machine for a soft metal material.

[ examples ] A method for producing a compound

Hereinafter, a soft metal receiving protective material according to an embodiment of the present invention will be described with reference to examples.

(test example 1: difference in surface roughness Ra)

Using the soft metal receiving protective material (size: 25 mm. times.25 mm) shown in Table 1, the degree of damage (aggressibility to the partner) to the extrusion-molded article of soft metal (aluminum) was measured as follows. Preparation of an extrusion Molding of aluminum as a Soft Metal sampleThe product was cut into a 40mm width, and the surface roughness measurement device (SURFCOM 1500DX3, made by Tokyo Corp.) was used to measure the ratio of: 2000 times, transverse magnification: the surface roughness Ra (1) was measured under a condition of 4.4 times. After the measurement, each light metal sample was heated to 500 ℃ and 500g/cm was applied to the heated light metal sample while the soft metal receiving protective material was held²While sliding the slide plate at a speed of 20mm/min for 3 minutes. The soft metal receiving protective material was reciprocated with a distance of movement of 200 mm. It was confirmed by a thermocouple connected to the soft metal sample that the temperature of the light metal sample was gradually decreased from about 400 ℃ to about 150 ℃ during the period from the start to the end of sliding of the soft metal receiving protective material. After cooling the soft metal sample to room temperature, the surface roughness Ra (2) was measured in the same manner as described above. The differences in surface roughness Ra (2) -Ra (1)) are shown in Table 1.

(test example 2: abrasion resistance)

A TABER abrasion test was carried out in accordance with JIS K6264 using the soft metal receiving protective material (size: 100 mm. times.100 mm) shown in Table 1. As the testing machine, TABER type Abslation Tester No. 101-HS manufactured by Antian Seiko K.K., was used under the following conditions: CS17, load: 4.9N, rotation speed: 60rpm, abrasion powder suction: -1.5 kPa (0.49 m)³In/min). The test was conducted in a case where the soft metal receiving protective material was subjected to a heat treatment at 400 ℃ for 8 hours to perform a heat treatment process (test A) and a case where the heat treatment process was not performed (test B), and the weight change before and after the test was determined. Table 1 shows the weight change of test a as weight change a and the weight change of test B as weight change B. In comparative example 6, the abrasion resistance test was omitted because of the high aggressivity to the partner.

(test example 3: Damage resistance at Soft Metal Molding and durability at Soft Metal Molding)

When an aluminum molded article of a hollow body having a width of 500mm × a height of 100mm × a length of 1000mm was produced by an actual extrusion molding machine, the soft metal receiving protective material (size: 500mm × 500mm) shown in table 2 was placed near the outlet of the extrusion molding machine, and the high-temperature aluminum molded article immediately after the extrusion molding was supported while sliding in the longitudinal direction. Extrusion molding was carried out for 40 hours continuously, and the presence or absence of damage (flaw resistance) of the sliding surface of each molded article after cooling was evaluated by a function test. Further, the presence or absence of the external appearance of the extrusion molding for 40 hours (durability) was visually checked. The evaluation criteria are as follows. The evaluation results are shown in table 2.

(a) Scratch resistance in molding of soft metals

O: when touched with a finger, no unevenness was felt.

X: when touched with a finger, the user can feel unevenness.

(b) Durability in molding of soft metal

Good: the appearance was not abraded.

X: the appearance is reduced.

(test example 4: extrusion distance can be used)

When a hollow 6000-series aluminum alloy molded body having a width of 220mm × a height of 30mm was produced by an actual extrusion molding machine, the soft metal receiving protective material (size: 400mm × 400mm) shown in table 3 was placed near the outlet of the extrusion molding machine, and the molded body of the high-temperature aluminum alloy immediately after the extrusion molding was supported while being slid in the longitudinal direction thereof, and it was confirmed that an extrusion distance was usable. The extrusion speed of the extrusion molding machine was 16m/min, and the contact temperature between the soft metal receiving protective material and the molded body of the aluminum alloy was about 550 ℃. The extrusion distance may be used in accordance with the length of the extrusion-molded body from the start of extrusion molding, and the degree of progress of abrasion of the protective material is visually confirmed by an operator trained on the site, and the length of the extrusion-molded body is determined so that abrasion of the protective material occurs to the extent that damage occurs to the surface of the molded body, or so that abrasion of the protective material occurs to the extent that the molded body cannot be supported.

Woven fabrics and felts (nonwoven fabrics) as fabrics used in examples and comparative examples, and composite materials of woven fabrics and resins are described below. The fiber diameter of the fibers used, the basis weight and thickness of the fabric, and the density and thickness of the composite material are shown in table 1.

(1) Examples 1 and 2

Plain weave, double weave of spun yarn using PBO fibers.

(2) Examples 3 and 4

Plain weave, double weave of the blended yarn having the composition shown in table 2 was used.

(3) Example 5

Plain weave, multiple weave (warp quad weave) using spun yarn of PBO fibers.

(4) Example 6

Plain weave, multiple weave (warp quad) using the blended yarn composition shown in table 2.

(5) Example 7

Plain weave, multiple weave (warp double weave) using spun yarn of PBO fibers.

(6) Comparative examples 1 and 6

A felt of PBO fibers.

(7) Comparative examples 2 to 4

A felt of a filament or spun yarn of each fiber having the composition shown in table 1 was used.

(8) Comparative example 5

The plain woven fabric having the blended yarn with the composition ratio shown in table 1 was impregnated with a phenol resin to have the composition shown in table 1, and then cured to obtain a composite material.

The thickness of the fabric and the composite material was measured with a constant pressure caliper (manufactured by Mitutoyo corporation, NTD 25-20C, measurement force 0.5 to 1N).

[ TABLE 1 ]

The fiber is very wide in range due to the mixing of various fibers.

[ TABLE 2 ]

The fiber is very wide in range due to the mixing of various fibers.

[ TABLE 3 ]

From table 1, it is understood that the soft metal receiving protective material having low aggressivity to a high-temperature soft metal molded article and excellent abrasion resistance can be provided by comparing the case of the fabric of the woven fabric containing the organic fiber containing the heat-resistant organic fiber with the case of the woven fabric containing the fiber containing the inorganic fiber, the case of the nonwoven fabric such as felt, and the case of the molded article. According to Table 2,

3, in actual use, in the case of a predetermined fabric, the soft metal molded article has low aggressivity to high temperature, and is excellent in durability (abrasion resistance), and the usable extrusion distance is significantly longer than that in the conventional art.