JPH0632907B2 - Base material for polishing cloth - Google Patents

Description

TECHNICAL FIELD The present invention relates to a base material for an abrasive cloth.

(Prior Art) A woven cloth conventionally used as an abrasive cloth has a problem in that the elongation in the running direction is increased and the shape is deformed mainly due to the shrinkage of the woven cloth under high load or repeated use. It was

On the other hand, the stitch-bonded cloth has an array of warp yarns that are parallel to each other and have a uniform spacing, an array of weft yarns that are parallel to each other and are in contact with each other at substantially right angles, and both yarns. Since it consists of stitch threads to be connected and does not have weaving shrinkage, it has less elongation than a woven cloth having the same thickness and number of threads, and it has little morphological stability due to less elongation in the running direction under high load or repeated use. It can be expected to improve the durability of grinding.

However, with conventional woven fabrics and stitch-bonded fabrics, the cover factor of the weft thread row is usually 40% or more in terms of the strength in the transverse direction, the adhesive on the weft thread side, and the finish suitable for coating abrasive grains. Has been said.

The cover factor (%) is 100-porosity-
(%), And the cover factor (%) of the weft thread is calculated by the following formula.

(Problems to be Solved by the Invention) The present invention uses the above stitch bond cloth as a base material for an abrasive cloth to improve productivity at a lower cost than conventional ones, and is rich in adhesive strength and under high load. In order to obtain a base material for abrasive cloth that can improve grinding durability in repeated use, we are going to develop a base material using stitch bond cloth with a weft row cover factor of 25-40% and its manufacturing method. is there.

(Means for Solving the Problems) In order to achieve the above object, the base material for abrasive cloth according to the present invention is composed of a large number of synthetic fibers or a blended yarn in a warp row in which a large number of warp threads are arranged. A stitch bond fabric formed by stacking weft yarn rows in which weft yarns are arranged and a cover factor is 25 to 40%, and the warp yarns and the weft yarns are connected by stitch yarns, and PVA for the stitch bond fabrics.
And a dipfill layer formed by impregnating cloth treatment with a dipfill cloth treating agent comprising water-soluble phenolic resin and a solution containing PVA and water-soluble phenolic resin on the surface of the dipfill layer on the weft row side A face-size layer formed by face-sizing with a solution containing a phenol resin and calcium carbonate, and a back-size cloth treatment comprising a latex and a water-soluble phenol resin and a filler on the warp row side surface of the dip fill layer. And a backsize layer formed by being backsized by the agent.

(Examples) Examples of the present invention will be described below with reference to the tables and the drawings.

FIG. 1 is an enlarged view of a stitch bond cloth 1 which is a base material for an abrasive cloth of the present invention.

The warp yarns 2 whose longitudinal direction is the running direction of the product are composed of multifilament fibers mainly of vinylon. This warp 2
This makes it possible to obtain a high-strength, low-elongation base fabric without heat setting like polyester.

Weft yarn 3 coated with make coat adhesive and abrasive grains 9
Is a spun yarn mainly composed of vinylon or polyester. By this weft yarn 3, a base cloth having good adhesiveness between a cloth treating agent and a general make coat adhesive made of a phenol resin or an epoxy resin and having a high resistance to shattering can be obtained.

The warp yarn 2 and the weft yarn 3 are connected with a stitch yarn 4 made of a nylon or polyester monofilament.

Table 1 shows characteristic values of the case of this stitch bond cloth 1.

FIG. 2 shows an enlarged cross section of an abrasive cloth using a base material obtained by subjecting the stitch bond cloth 1 to cloth treatment.

The stitch bond cloth 1 is subjected to a dip fill cloth treatment using an aqueous solution in which PVA and a water-soluble phenol resin are mixed at a solid content ratio of 2: 1 to form a dip fill layer 5. The viscosity of this dipfill treatment agent is 200-30
At 0 cps, the added amount after drying is 20 to 30 weight percent of the raw woven fabric. The dip fill prevents fuzz in the cross section of the base fabric and improves the adhesiveness.

Next, on the side of the weft yarn 3, a solution containing PVA and a water-soluble phenol resin in a solid content ratio of 2: 1 or a solution containing a phenol resin and calcium carbonate in a ratio of 1: 1,
Perform face size. This face size treatment agent
It has a relatively high viscosity of 2000-3000 cps and its added amount after drying is 5 to 25% by weight of the raw woven fabric.

FIG. 2 shows the formed face size layer 6, which fills the recesses of the base fabric caused by the weft threads 3 and flattens the surface.

Next, backsize is performed on the warp yarn 2 side with a solution in which a latex, a water-soluble phenolic resin, and a filler of calcium carbonate or sigleite are mixed at a solid content ratio of 1: 1 to 2. The formed backsize layer 7 is shown in FIG. This backsizing agent has a high viscosity of 4000-6000 cps and its dry loading is 50-80% by weight of the raw woven fabric. The latex used for the back size is a synthetic latex of SBR, NBR and vinyl acetate.

Table 2 shows the data obtained by comparing the physical properties of the base material obtained by the above cloth treatment with the woven base material of the prior art.

(Effects of the Invention) Since the present invention has the above configuration, it has the following advantages.

(1) Since the weft and the stitch-bonded cloth according to the prior art use less wefts, the productivity is improved, and since the amount of used yarns is small, it is possible to obtain a base cloth with low production cost.

(2) Furthermore, since the adhesive area on the weft thread side increases, by performing a treatment that can increase the adhesive strength of the abrasive cloth, a base cloth with performance that is not inferior to that of the conventional base cloth is obtained. Obtainable.

[Brief description of drawings]

FIG. 1 is an enlarged explanatory view (plan view) of a stitch bond cloth 1 used in the present invention, and FIG. 2 is an enlarged side explanatory view (cross-sectional view) of an abrasive cloth using the base material of the present invention. (Explanation of symbols of main parts) 1: Stitch bond cloth 2: Warp threads 3: Weft threads 4: Stitch threads 5: Dip fill layer (impregnated cloth) 6: Face size layer 7: Back size layer 8: Make coat layer 9: Abrasive grain

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location D06M 15/693

Claims (1)

[Claims] 1. A warp yarn row in which a large number of warp yarns are arranged, a weft yarn row composed of a large number of synthetic fibers or a mixed yarn is arranged, and a weft yarn row having a cover factor of 25 to 40% is overlaid. A stitch bond cloth formed by connecting with a stitch thread, and a dip fill layer formed by impregnating the stitch bond cloth with a dip fill cloth treating agent made of PVA and a water-soluble phenol resin. PV on the surface of the dip fill layer on the weft thread side.
A face-size layer formed by face-sizing with a solution containing A and a water-soluble phenol resin or a solution containing a phenol resin and calcium carbonate, and a latex and a water-soluble phenol on the warp row side surface of the dip fill layer. A back-size layer formed by back-sizing with a back-size cloth treating agent comprising a resin and a filler.