KR840005830A - Abrasive and manufacturing method thereof - Google Patents

Abstract

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Description

Abrasive and its manufacturing method

As this is a public information case, the full text was not included.

1 is a cross-sectional view showing an embodiment for generating a crack in the synthetic resin solid body in the present invention.

2 is a plan view showing the shape of the abrasive grains of the present invention and the occurrence of cracks;

3 is a plan view of a molded article of a semiconductor device having a moldflash.

Claims (28)

An abrasive made of a synthetic resin solid having a plurality of doll blades and having cracks that are easily cracked and broken by collision with the workpiece. The abrasive according to claim 1, wherein the surfactant is held in this synthetic resin solid. The abrasive according to claim 2, wherein the surfactant is mixed in the surface and the inside of the synthetic resin solid. The abrasive according to claim 2, wherein the surfactant adheres only to the surface of the synthetic resin solid. The abrasive according to claim 2, wherein the surfactant is a nonionic surfactant. The abrasive according to claim 5, wherein the nonionic surfactant contains no halogen, ammonia, phosphorus, sulfur, or metal ion. The abrasive according to claim 1, wherein the synthetic resin solid content contains 1% by weight or less of surfactant therein. The abrasive according to claim 7, wherein the surfactant is a nonionic surfactant. The abrasive according to claim 8, wherein the nonionic surfactant contains no halogen, ammonia, phosphorus, sulfur, or metal ion. The abrasive according to claim 1, wherein the synthetic resin solid is a thermosetting resin. The abrasive according to claim 10, wherein the thermosetting resin is selected from cured products of urea resins, melamine resins, unsaturated polyester resins, alkyd resins, and epoxy resins. The abrasive according to claim 1, wherein the synthetic resin solid is at least one type selected from flat, needle and block yarns. The abrasive according to claim 1, wherein the synthetic resin solid particle diameter (1/2 of the sum of the maximum and minimum diameters of the solid) has a peak value and an average value in the range of 0.05 to 2,0 mm. A method for producing a synthetic resin abrasive comprising molding a synthetic resin material and then granulating the synthetic resin material, wherein in the forming step or granulation step, cracks are easily cracked due to collision with the workpiece. Manufacturing method. The method according to claim 14, wherein the inside and outside are generated during molding of the synthetic resin material. The production method according to claim 15, wherein the thermosetting resin is preliminarily powdered and dispersed in a synthetic resin material to form a nucleus to generate internal and external conditions. The method according to claim 15, wherein the synthetic resin material is gelled by heating or by the addition of a catalyst to generate right during curing. The production method according to claim 15, wherein the synthetic resin material is cured at a higher temperature than usual to generate an interior by the rapid curing reaction. The production method according to claim 15, wherein the synthetic resin material is immersed in a solvent or in boiling water after molding, and then pulverized it. The manufacturing method of Claim 14 of Claim 14 which granulates the granulated synthetic resin particle by the process tool which has many pickles. The manufacturing method of Claim 14 which refine | miniaturizes the granulated synthetic resin particle at the temperature of 10 degrees C or less. The production method according to claim 14, wherein the granulated synthetic resin particles are brought into a state of reduced strength at a high temperature, and the fine particles are granulated. The method according to claim 14, wherein the synthetic resin molded article is subjected to thermal granulation after quenching or quenching and then granulated. The manufacturing method of Claim 14 which mixes surfactant previously with a synthetic resin raw material. The method according to claim 14, wherein the surface of the synthetic resin material is solidified and then the surface of the surface is coated with a surfactant. 26. The method of claim 25, wherein the coating is by dipping the synthetic resin granules into a surfactant solution. The method according to claim 25, wherein the surfactant is coated after the crack is generated in the synthetic resin solid. ※ Note: The disclosure is based on the initial application.