JPS61138771A - Base material for polishing cloth and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) This invention is lower in cost than conventional abrasive cloth substrates, has higher adhesive strength, and improves grinding durability especially during repeated use under high loads. The present invention relates to a base material useful for an abrasive cloth and a method for producing the same.

(Conventional technique v&) Woven fabrics conventionally used as abrasive cloths have a problem in that their shape becomes deformed due to increased elongation in the running direction, mainly caused by shrinkage of the woven fabric, due to high loads or repeated use. Ta. On the other hand, switchand cloth connects an array of warp yarns that are parallel to each other and have uniform spacing, and an array of weft yarns that are parallel to each other and have uniform spacing that are in contact with the warp yarns at approximately right angles to the warp yarns. Since it is made of stitch threads and does not shrink, it stretches less than fabrics with the same size and number of threads, and has less elongation in the running direction under high loads or repeated use, and is stable in shape, so it is expected to improve grinding durability. Wear. However, the cover factor of conventional woven fabrics, stainless steel fabrics, and chibond fabrics in the weft series is usually 40≦ or higher due to the strength in the transverse direction, the adhesive on the weft side, and the finish suitable for coating with abrasive grains. I came. Note that the cover factor (%) is defined as Woo-space ratio (%), and the cover factor (≦) of the weft yarn is calculated by the following formula.

Weft cover factor (to) Akebono! Jomo! Ω$：/Vk
+) 100 but 11 series count (Problem to be solved by the invention) This invention uses the above-mentioned stitch bond cloth as an abrasive cloth base material to achieve ring adhesion that can increase productivity at a lower cost than conventional ones. In order to obtain an abrasive cloth base material that can improve grinding sustainability during repeated use under high loads, we are developing a base material made of stitch bonded cloth with a horizontal series cover factor of 25 to 40 and its manufacturing method. It is something.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a basic means for achieving the above-mentioned object.
Stitch bonded fabrics with a strength of 5 to 40% have machine and transverse strength that can be used as abrasive fabrics and are suitable for footing make coat adhesives and abrasive grains in the manufacturing process of abrasive fabrics due to the fabric treatment of this invention. It is used as a base material for finishing. The manufacturing method involves first impregnating cloth treatment using a Dipfil cloth treatment agent with a specified amount of PVA and water-soluble phenolic resin, and then using a 71-Snaize cloth treatment agent with a specified amount of PVA and water-soluble phenol or phenolic resin and calcium carbonate. Back side cloth treatment and back size cloth treatment agent't? The backside fabric is treated with specific amounts of TEAX and water-soluble phenolic resin and filler.

(Function) The eyebrow shaping effect of this invention will be explained below. First, compared to the case of stitch bonded fabric in which the weft series is covered with 40 or more cover 7 actors in the conventional technology, the number of weft threads is reduced, so the unevenness on the weft side is reduced. In other words, since the surface area increases, the bonding area on the weft side of the base fabric, which is the side to which the abrasive grains are bonded, increases, making it possible to increase the bonding force of the abrasive fabric. In addition, since the number of weft yarns is small, the productivity during weaving by a loom is increased, the production speed is high, and the amount of yarn used is small, so a base material with low production cost can be obtained.

Next, the base fabric is impregnated with water-soluble PVA and phenolic resin, and the phenol of the make coat adhesive penetrates into the yarn and separates it, preventing deterioration of the base material and fixing the exchange point between the warp and weft yarns. Perform cloth treatment. Furthermore, in order to smooth out unevenness on the surface of the base fabric and improve the adhesion between the base fabric and a general make coat adhesive made of phenol resin or epoxy resin, 7! - Perform surface fabric treatment with a sizing fabric treatment agent. Furthermore, on the back side of the base fabric,
The Kupuizu cloth treatment agent prevents thread weakening due to abrasion that occurs on the base fabric when used as an abrasive cloth, and provides a high coefficient of friction to prevent slipping.

Through the above processing, the horizontal series cover factor is reduced to 2.
The base fabric is reduced by 15-40% compared to the prior art, and it achieves the intended purpose as it is low cost and has high adhesive strength, especially when used repeatedly under high loads. can do.

(Example) Examples of the present invention will be described below based on the attached table and drawings.

FIG. 1 shows an enlarged view of a stitch bonded cloth which is a base material for an abrasive cloth of the present invention. It is made of multifilament fibers whose longitudinal direction is the running direction of the product and whose warp threads are mainly made of vinyl alcohol (PV&). With this warp yarn, a base fabric with high strength and low elongation can be obtained without the need for heat setting as in the case of finishing polyester. The weft yarn coated with the make coat adhesive and the abrasive grains consists of a spun yarn mainly made of PVA or polyester. The weft provides a base fabric that has good adhesion to fabric treatment agents and common make coat adhesives such as phenol resins and epoxy resins, and is highly resistant to shedding. These warp and weft threads are connected by threads made of heptanofilaments of nylon or polyester. The characteristic values of the case of this stainless steel cloth are shown in Attached Table 1.

Figure 2 shows an enlarged cross-section of an abrasive cloth using a base material obtained by processing stitch bond cloth. Stitch bond cloth with PTA and hydrophilicity 7/-# resin with solid content ratio 2: A dip fill layer is formed by performing dip fill fabrication using an aqueous solution blended in the proportion of L. The viscosity of this Diabfil treatment agent is 200 to 300 (
The amount added after drying with ip- is 80 to 30 of that of unprocessed woven fabric.
Percentage by weight. Dip fill prevents fluffing of the cross-section of the base fabric and improves adhesion.Next, melted at or 71]--resin containing PTA and water-soluble phenol resin at a solid content ratio of 2+1 on the weft side. Face size is performed using a solution containing 171% of lucium and carbonate. This 7. - Scythe treatment agent is 20oO ~
It has a relatively high viscosity of 3000 ap* and its dry loading ranges from 5 to 25 weight percent of the raw woven fabric.

Figure @2 shows the face size layer formed, which fills in the recesses 1 of the base fabric caused by the weft and flattens the surface.

Next, backsizing is performed on the warp side using a solution containing latex, a water-soluble phenol resin, and a filler such as calcium carbonate or gicrite in an m-type fraction ratio of 1+l to 2. FIG. 2 shows the formed bag size layer. This backsizing agent has a high viscosity of 4000 to 6000 op-, and the amount added after drying is 50 to 80 percent by weight of the raw woven fabric. The latex used for the back size is a 5nnSNBiq vinyl acetate synthetic latex.

Data comparing the physical properties of the base material obtained by the above cloth treatment with that of a woven fabric base material according to the prior art is shown in Attached Table 2.

Separate table 'a2 〔Effect of the invention〕 Since the present invention has the above configuration, it has the following advantages.

(1) It is possible to obtain a base fabric with a lower productivity because it has fewer weft threads than conventional woven fabrics and staple/chibond fabrics, and because it uses less needle thread.

(ml) Furthermore, by performing a treatment that increases the adhesion area on the weft side and thus increasing the a! adhesion strength of the abrasive cloth, it is possible to obtain a base fabric with performance comparable to that of conventional base fabrics. What you can do.

[Brief explanation of the drawing]

Fig. 1 is an enlarged explanatory view of the stitch bond cloth that is used in this invention (plane vi>, taz is an enlarged side view (cross-sectional view) of the abrasive cloth using the base material of this invention. Explanation of symbols) 1. Stitch sand cloth 2: Warp 3 + Weft 4: Stitch thread 5 = Dip fill layer (impregnated cloth) 6; figure

Claims (1)

[Claims] In stitch bonded fabrics with a weft series cover factor of 25 to 40% made of synthetic fibers or blended yarns, dip fill fabric treatment is an impregnated fabric treatment consisting of PVA and water-soluble phenolic resin, and face size fabric treatment is PV.
A and a water-soluble phenol resin or a phenol resin and calcium carbonate for surface fabric treatment, and a back size fabric treatment agent for an abrasive fabric treatment consisting of latex, water-soluble phenol resin, and filler. Material and manufacturing method.