KR100378460B1 - Backing material for abrasive - Google Patents

Abstract

The present invention relates to a fabric substrate for ultra-wide abrasive cloth, and in particular, to improve the productivity of the production equipment for the processing of the workpiece and the production of the ultra-wide abrasive belt required for improved productivity of the improved function having a low elongation and excellent tensile force In the present invention, for the present invention, in the abrasive cloth fabric base material consisting of chemical fiber yarns and blended fiber yarns, RFL resin is impregnated with the yarn used for the tire coat yarn and the elongation is low by heat setting. Regardless of the type of high yarn or yarn, the heat-set yarn after stretch is used as the weft to reduce elongation, but the yarn is woven from one selected from single yarn and their plywood.

Description

Fabric Material for Ultra-Wide Abrasive Cloth {BACKING MATERIAL FOR ABRASIVE}

The present invention relates to a textile substrate for abrasive cloth.

More specifically, the present invention is an ultra-wide abrasive belt required for production facility automation and productivity improvement for the processing of the workpiece, an improved elongation and excellent tensile strength to perform the function of the polishing belt without difficulty It is to provide a functional abrasive cloth substrate.

Generally, abrasive products are classified into substrates, adhesives, abrasives, and the like, and when the substrate is a fabric, it is further divided into cotton, chemical fibers, blended fibers, nonwoven fabrics, metal fibers, etc. These base materials are used suitably individually or in mixture of one or more components.

At present, most of the fabrics used as the abrasive cloth base material have a higher density of warp than the weft yarns constituting the cloth. In recent years, such cloths have been automated and large-scaled in production facilities in the processing stage of the workpiece. In addition, the width of 2000mm or more is continuously required to improve productivity.

This required width is much wider than the conventional 1390mm width, which is wider than the limited 1800mm width designed.

However, in spite of the above requirements, the polishing cloth having a width of 2000 mm or more was never easy to manufacture.

In other words, since the processing equipment of the polishing cloth base itself is set to 1390 mm, which is a general use width, when the production facility is enlarged only for products of 2000 mm or more, the economical efficiency is low due to the investment value of limited production.

In addition, the secondary cause is according to the structure of the processing equipment, for example, conventionally to maintain the structure (to reduce elongation) to pull the fabric substrate in the inclined direction (MD) for processing of the polishing cloth substrate (MD) However, if the elongation of the fabric does not decrease and the elongation characteristics of the original fabric are maintained, the use of the abrasive cloth product increases the product and the abrasive is released, so it is not worth it as an abrasive product.

In particular, in the case of the abrasive cloth belt, excessive frictional heat is generated while the belt rotates during grinding or polishing, and also increases due to the load of the machine, which may cause the belt itself to break or be pulled to one side, resulting in damage to the grinding machine. Sometimes.

Moreover, the frictional heat and mechanical tension of the ultra-wide abrasive products used from 2000mm to 4000mm width are much higher than those of general abrasive products, so these ultra-wide abrasive products require more precise processing of substrates.

Attached Figure 1 shows a substrate of a conventional 1390mm abrasive product, as shown, heat setting using a tenter (TENTER) to prevent the weft (CD) from shrinking due to the fabric pulled in the inclined direction (MD) By (HEAT SETTING), the tensioning material in the inclined direction is increased, and a substrate for polishing cloth having a low elongation is produced.

In the case of manufacturing the polishing belt using the processed substrate as described above, since the rotational direction of the polishing belt and the inclined direction in which the tension and elongation of the processed substrate are fixed coincide with each other, there is no phenomenon in which the substrate is stretched during use.

However, in the case of ultra-wide abrasive products, because of the limited width, an extra-wide abrasive belt having a width of 2000 mm or more is manufactured by adding 1 to 3 pieces in the inclined direction of the abrasive cloth base material so that the elongation and tension of the abrasive cloth having adjusted elongation and tension during substrate processing In the ultra wide abrasive belt, the direction acts in the width direction of the belt.

Therefore, the direction of rotation of the ultra-wide abrasive belt shrinks during processing of the substrate, so that the elongation of the substrate is high and the tension is low, so that the ultra-wide polishing belt manufactured by applying the conventional processing method may eventually break during use, and also the elongation of the substrate. This cursor can be severely unusable, such as not being rotated to one side or rotated.

In order to overcome the above problems, it is necessary to increase the tension in the weft direction and reduce the elongation.However, if the weft density of the fabric is increased to increase the tension in the weft direction, the high density of the weft inevitably increases the elongation, so the productivity of weaving the fabric The method of causing a decrease and an increase in unit cost and simply increasing the density of the weft yarn is not suitable as the substrate of the ultra-wide abrasive belt.

On the other hand, when heat-fixing through expansion in the tenter for the purpose of reducing elongation in the weft direction, it is impossible to expand more than 3% due to the characteristics of the tenter facility, and the tenter can prevent the width of the fabric from shrinking during fabric processing. It can only play the role of, and when using a cotton cloth with a low elongation, it contains a fatal problem of low tensile strength and weak chemicals.

Therefore, it is inevitable to use blended fiber or chemical fiber yarn as the yarn of the weft.

Therefore, the present invention is fixed to the elongation is fixed without providing a separate expansion process to adjust the elongation in the weft direction when processing the substrate for the ultra-wide abrasive cloth of the woven fabric, the tensile strength is excellent, as well as the change in physical properties after the production of the polishing cloth It is an object of the present invention to provide an ultra-wide abrasive substrate which cannot be found.

1 is an explanatory diagram showing a substrate of a conventional 1390 mm abrasive product;

2 is an explanatory diagram showing a substrate of an ultra-wide abrasive article;

The abrasive cloth fabric substrate of the present invention can be reproduced in a better state through the preferred embodiment described below.

2 is an explanatory view showing a substrate of an ultra-wide abrasive article.

First, in the present invention, as the yarn for the weaving base material of ultra-wide abrasive products, because the RFL resin is impregnated and heat-treated in the chemical fiber yarns, yarns that have high tensile strength and low elongation, or which are heat-set by stretching (STRETCH) By using a yarn, weaving any one selected from single yarns and their plywoods, the resulting woven fabric can be suitably used as a base material for ultra-wide abrasive products having high tensile strength and low elongation by adjusting the elongation in the weft direction. The RFL resin refers to a mixture of an acidic initial condensate of RESORCINOL-FORMALDEHYDE and LATEX, and nylon or polyester yarn used in tire manufacture has problems in adhesion due to the chemical composition of the fiber. It has the property that the elongation is 15 ~ 20% due to the physical property of the fiber. Therefore, in order to compensate for the adhesion and elongation, the fibers are pretreated and heat treated. The resin for fiber pretreatment (RESIN) used at this time is called RFL.

Experimental conditions for the embodiments of the present invention are as follows.

<Experimental conditions>

(1) Abrasive material: SiC 120 mesh (that is, SiC P120, average particle size 125㎛), the adhesion amount is 800g / ㎡.

(2) Adhesive: Phenolic resin which has the characteristic of a phenol resin solid content of 70%, and a viscosity of 2000 CPS / 25 degreeC.

(3) Filler: 35 ~ 40% by weight used for adhesive.

(4) Adhesive drying and curing conditions: 70 ~ 120 ℃ × 10hr.

(5) Tensile strength measurement: length 12.5Cm × width 2.54Cm The product was tested at a speed of 50M / MIN at the tension machine, the cell of the tension machine was 500 KGf.

(6) Adhesive force: Bond 10 cm long x 5 cm wide product and test at a speed of 50 M / MIN at the tension machine. The cell of the tension machine is 500 KGf.

(7) Smoothness (evening degree): Number of slugs, NEPs, protrusions, etc. within 1M in length x 1M in width.

(8) Fabric Structure: 1/2 TWILL.

(9) Heat fixation: 150 ℃ × 3MIN.

(10) TJ pulled 12% in the inclined direction. (11) MJS company: MJS company, an abbreviation of MURATA JET SPINNER, a kind of spinning machine produced in Japan. (12) PARALLEL YARN: Manufactured by applying a constant twist of FILAMENT yarn around spun yarn as described in the detailed description of the present invention of Korean Patent No. 014859. Says old thread.

<Example 1>

In Example 1, both of the warp and weft yarns were used as a fabric structure, and blended fiber yarns were used. In the present invention, the weft density is increased to increase the tensile force in the weft direction.

In addition, the reason for reducing the density of the warp is to reduce the tension force of the warp and to draw it well in the width direction (CD). However, in Example 1, when the abrasive cloth product is manufactured using the conventional tissue, the tension of the warp yarn is improved. Although the elongation was not improved, it was evaluated to be problematic for use as an ultra-wide abrasive cloth product.

Therefore, in the present invention, it is possible to use all of cotton, blended fiber, chemical fiber yarn, metal yarn, etc. through the improvement of the method of spinning the components and the yarn constituting the woven fabric, yarn also OE yarn, RING yarn, MJS yarns (threads with physical properties between OE yarns and RING yarns), horizontal yarns and filament yarns can be used evenly.

Although the yarn of the weft yarn may be most preferably used, it is a cotton component, but the cotton fabric has a low elongation, which is advantageous in manufacturing an abrasive cloth, but has a disadvantage in that the tension is small and the chemical is weak.

As described above, the most suitable yarn for use in the ultra-wide abrasive belt is a weft yarn tire coat yarn, which is heat treated to have low elongation and high tensile strength.

In addition, regardless of the type of yarn, when pulled and fixed to reduce the elongation of the yarn, or when the woven fabric using the stretched yarn is used for the polishing cloth, the elongation is fixed without the need for a separate expansion process. It can be used in ultra-wide abrasive products, and there is no problem in physical properties after the production of abrasive cloth.

<Example 2>

Note 1) Weft T / C 20s / 2 of the present invention tissue 1 is a general yarn.

Note 2) The weft PE 20s / 2 of the present invention tissue 2 is stretched and heat-set yarn.

Note 3) The weft of the present invention tissue 3 is a filament yarn impregnated with RFL resin used for tire coat.

In Example 1, after using the experimental conditions as it is, the conventional tissue is manufactured in the ultra-wide abrasive product by stretching 12% in the inclined direction in the tenter, the present invention tissues 1, 2, 3 is expanded only 0.5% in the weft direction The result is a case of manufacturing an abrasive product, according to the second embodiment of the present invention tissue 2 and the present invention tissue 3, the tensile strength in the weft direction is very high, a low elongation abrasive cloth product is completed.

Therefore, since the weft direction acts in the rotational direction in the ultra-wide abrasive cloth belt, the phenomenon of stretching or breaking does not occur when using the ultra-wide abrasive belt.

Therefore, the ultra-wide abrasive cloth fabric substrate according to the present invention can maintain a low elongation and high tensile strength without providing a separate expansion process to control the elongation in the weft direction, and there is no change in physical properties even after manufacturing the abrasive cloth Have

On the other hand, the present invention has been referred to only the best embodiments thereof, but it is obviously not limited to this, it will be obvious that it can be carried out without departing from the scope of the claims within the scope of the present invention.

Claims (3)

In the base material for abrasive cloth composed of chemical fiber yarn or blended fiber yarn, the yarn used for tire coat yarn is impregnated with RFL resin and has low elongation due to heat setting and high elongation regardless of the type of yarn or yarn with high tensile strength. In order to reduce the stretch (STRETCH), but using a heat-set yarn as a weft, ultra-wide abrasive cloth fabric substrate, characterized in that weaving into any one selected from single yarn and their plywood. delete The ultra-wide abrasive cloth fabric substrate according to claim 1, wherein the abrasive cloth substrate is not expanded in the weft direction during processing.