CN107225516B - Manufacturing method of flexible 3D grinding tool - Google Patents

Abstract

The invention relates to the technical field of grinding tools, in particular to an adhesive composition for a flexible 3D grinding tool, the flexible 3D grinding tool and a manufacturing method thereof, wherein the adhesive composition for the flexible 3D grinding tool comprises the following raw materials in parts by weight: 2-5 parts of an adhesive A, 1-20 parts of a leveling resin B and 50-200 parts of an adhesive C, wherein the adhesive A comprises the following raw materials in parts by weight: 15-30 parts of light-cured resin a and 70-85 parts of heat-cured resin a; the leveling resin B is a light-cured resin B; the adhesive C comprises the following raw materials in parts by weight: 15-30 parts of light-cured resin a and 70-85 parts of heat-cured resin a. The adhesive composition disclosed by the invention has stronger binding power, so that each layer of the 3D grinding tool has stronger binding power, the prepared 3D grinding tool has higher binding strength and stability, and the phenomenon of interlayer separation of the 3D grinding tool in the using process is avoided.

Description

A kind of manufacturing method of flexible 3D abrasive tool

technical field

The invention relates to the technical field of abrasive tools, in particular to an adhesive composition for a flexible 3D abrasive tool, a flexible 3D abrasive tool and a manufacturing method thereof.

Background technique

Humans have been using natural grindstones for a long time to process tools such as stone knives, stone axes, bone tools, horns and tooth tools; in 1872, the first man-made man-made combination of natural abrasives and clay appeared in the United States. Abrasives - ceramic grinding wheels; around 1900, artificial abrasives came out, and various abrasives made of artificial abrasives were produced one after another, creating conditions for the rapid development of grinding and grinding machines.

Abrasives are classified according to their basic shapes and structural features, including bonded abrasives and coated abrasives. Bonded abrasives are tools with a certain shape and a certain grinding ability made of abrasives (grinding materials) and binders, including grinding wheels, grinding heads, oil stones, sand tiles, etc., which have the characteristics of long life and high cutting force. , but it is not suitable for the processing of complex surfaces, and it is easy to cause deep scratches or even burns to the workpiece during use. Coated abrasives refer to abrasives made by adhering abrasives to flexible substrates (cloth, paper, plastic films, etc.) with binders. Compared with bonded abrasives, coated abrasives are softer Good, easy to use, wide applicability, suitable for processing large areas and complex surfaces, but because it is obtained by coating, the abrasive is single-layer or multi-layer, and its service life is much lower than that of bonded abrasives. In the process, clogging is easy to occur, which further reduces the life and grinding effect of the coated abrasives.

SUMMARY OF THE INVENTION

In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide an adhesive composition for flexible 3D abrasive tools, which The layers have strong cohesive force, so that the 3D abrasive tool produced has high cohesive strength and stability, and ensures that the 3D abrasive tool will not be separated between layers during use.

Another object of the present invention is to provide a flexible 3D abrasive tool, the flexible 3D abrasive tool is formed by bonding a flexible substrate layer, a pre-coating adhesive layer, a leveling resin layer and a 3D abrasive layer to each other, so that the pre-coating The adhesive layer and the leveling resin layer and between the leveling resin layer and the 3D abrasive layer have strong bonding force, so that the 3D abrasive tool produced has high bonding strength and stability, ensuring the 3D abrasive tool. There will be no separation between layers during use.

Another object of the present invention is to provide a manufacturing method of a flexible 3D abrasive tool. The manufacturing method is simple to operate. The first thermal curing molding of the 3D abrasive is performed to remove the liquid in the 3D abrasive, the molding surface is lowered, and the molding surface is lowered. It is slightly lower than the level of the molding cavity, which is conducive to pouring the raw material of the leveling resin layer into the descending 3D abrasive layer molding surface, thereby ensuring the leveling resin layer and the pre-coating primer layer are stably attached; Thermal curing molding makes the pre-coating primer layer stable and can be stably bonded with the leveling resin layer, and through the light curing molding and the third thermal curing molding, the three adhesives are cross-linked and reacted with each other, so that the There is strong adhesion between the primer layer and the leveling resin layer, and between the leveling resin layer and the 3D abrasive layer, which increases the interlayer adhesion, improves the bonding strength and stability of the 3D abrasive, avoids The phenomenon of interlayer separation occurs.

The object of the present invention is achieved through the following technical solutions: a kind of adhesive composition for flexible 3D abrasive tools, comprising the following raw materials by weight:

Adhesive A 2-5 copies

Leveling resin B 1-20 parts

Adhesive C 50-200 copies;

The adhesive A includes the following raw materials by weight:

Light curing resin a 15-30 copies

70-85 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

Light curing resin a 15-30 copies

Thermosetting resin a 70-85 parts.

The above-mentioned three kinds of adhesive compositions used in the present invention all have strong cohesive force, and adopt the principle of similar compatibility, the light-curing resin a in the adhesive A can be b) Compatible phase reaction, the light-cured resin a in the adhesive C can react with the leveling resin B (ie, the light-cured resin b) in a compatible phase to realize the cross-linking reaction between the three adhesives and improve the The cohesiveness of the adhesive composition makes the layers of the 3D abrasive tool have strong cohesive force, thereby making the prepared 3D abrasive tool have high stability and bonding strength, ensuring that the 3D abrasive tool is in There will be no interlayer separation during use, and the high bonding force between the layers ensures that the 3D abrasive can be released from the mold cavity smoothly, avoiding the phenomenon of interlayer separation during the demolding process.

Preferably, the photocurable resin a is epoxy acrylate; the photocurable resin b is composed of organic acid-modified epoxy acrylate and polyester acrylate in a weight ratio of 3-15:1. mixture; the thermosetting resin a is at least one of glycidyl ester epoxy resin and glycidyl ether epoxy resin.

By adopting the above-mentioned types of photocurable resins and thermosetting resins, the present invention has better thermosetting and photocuring properties, high stability, and enables the adhesive A, the leveling resin B and the adhesive C to utilize similar compatibility principles, The cross-linking reaction occurs to improve the bonding performance between the adhesives, thereby improving the bonding force between the pre-coating primer layer and the leveling resin layer, between the leveling resin layer and the 3D abrasive layer, and avoiding the occurrence of interlayers. phenomenon of separation.

Another object of the present invention is achieved by the following technical solutions: a flexible 3D abrasive tool prepared from the above-mentioned adhesive composition for a flexible 3D abrasive tool, comprising a flexible substrate layer and a pre-coating primer layer that are sequentially attached , the leveling resin layer and the 3D abrasive layer, the lower surface of the pre-coating primer layer is attached to the upper surface of the flexible substrate layer, the lower surface of the leveling resin layer and the upper surface of the pre-coating primer layer Surface bonding, the lower surface of the 3D abrasive layer is bonded to the upper surface of the leveling resin layer.

Preferably, the pre-coating primer layer includes the following raw materials by weight:

Adhesive A 90-110 copies

Photoinitiator 0.1-1.5 parts

Thermal curing agent 15-35 parts.

In the present invention, the pre-coating primer layer is prepared by using the above-mentioned raw materials, and the dosage of each raw material is strictly controlled, so that the pre-coating primer layer has better adhesive force and photo-initiating performance, and the photoinitiator can make the pre-coating primer layer and the pre-coating primer layer. The epoxy group of the raw material in the leveling resin layer undergoes a partial ring-opening reaction under the action of the photoinitiator, which improves the adhesion between the pre-coating primer layer and the leveling resin layer, thereby improving the adhesion of the 3D abrasive tool. strength and stability.

Preferably, the leveling resin layer comprises the following raw materials by weight:

Leveling resin B 90-110 parts

Photoinitiator 0.1-1.5 parts

Leveling aid 0.01-0.2 parts.

The present invention prepares the leveling resin layer by using the above-mentioned raw materials, and strictly controls the amount of each raw material, so that the raw materials can be mixed evenly, and can react with the pre-coating primer layer and the 3D abrasive layer, wherein, the thermal curing agent is heated under heating conditions. The photo-curable resin a, the photo-curable resin b and the thermo-curable resin a can react under the condition of the light source, and the photo-initiator can cause the photo-curable resin a, the photo-curable resin b and the thermo-curable resin a to react under the condition of the light source, thereby making the adhesive A. Both leveling resin B and adhesive C can undergo partial crosslinking reaction under heating conditions and light source conditions, and promote the epoxy groups in photocurable resin a, photocurable resin b and thermosetting resin a Partial ring-opening reaction occurs under the action of the initiator, which improves the bonding force between the pre-coating primer layer and the leveling resin layer, between the leveling resin layer and the 3D abrasive layer, and improves the bonding strength and stability of the 3D abrasive tool. sex.

Preferably, the 3D abrasive layer includes the following raw materials by weight:

Adhesive C 90-110 copies

Heat curing agent 15-35 parts

Photoinitiator 0.1-1.5 parts

Abrasive powder 45-65 parts

Filler 170-190 parts

Performance modifier 0.1-1.0 parts.

The present invention prepares the 3D abrasive layer by using the above-mentioned raw materials, and strictly controls the dosage of each raw material, so that the raw materials can be mixed evenly, and a plurality of abrasive micropowders can make the blunt abrasive at the interface of the abrasive tool fall off synchronously, exposing new The sharp grinding interface keeps the abrasive tool in good sharpness and has a long service life. The curing agent can initiate the reaction of photocurable resin a, photocurable resin b and thermosetting resin a under heating conditions, and the photoinitiator can initiate the reaction of photocurable resin a, photocurable resin b and thermosetting resin a under light source conditions, Then, the adhesive A, the leveling resin B and the adhesive C can all undergo partial cross-linking reaction under heating conditions and light source conditions, and promote the ring formation in the photocurable resin a, the photocurable resin b and the thermosetting resin a. Under the action of the photoinitiator, the oxygen group undergoes a partial ring-opening reaction, which improves the adhesion between the pre-coating primer layer and the leveling resin layer, between the leveling resin layer and the 3D abrasive layer, and improves the performance of the 3D abrasive tool. Bond strength and stability.

Preferably, the thermal curing agent is an acid anhydride curing agent, and the acid anhydride curing agent is at least one of methyltetrahydrophthalic anhydride, methylcyclohexenetetracarboxylic dianhydride, and maleic anhydride The photoinitiator is a cationic photoinitiator, and the cationic photoinitiator is at least one of an iodonium salt photoinitiator and an aromatic ferrocene salt photoinitiator.

The present invention has better thermosetting and weather resistance by using the above-mentioned thermosetting agent, and the photocurable resin a, the photocurable resin b and the thermosetting resin a that can be induced by the thermosetting agent react under heating conditions, thereby making the adhesive A , Leveling resin B and adhesive C can undergo partial cross-linking reaction under heating conditions to improve the adhesion between the pre-coating primer layer and the leveling resin layer, and between the leveling resin layer and the 3D abrasive layer. , to improve the bonding strength and stability of the 3D abrasive; and by using the above-mentioned photoinitiator, it has better photoinitiator performance and stability, and the photoinitiator can trigger the photocurable resin a, The photocurable resin b reacts with the heat curable resin a, so that the adhesive A, the leveling resin B and the adhesive C can undergo partial cross-linking reaction under the light source condition, and promote the photocurable resin a, the photocurable resin b and the adhesive C. The epoxy group in the thermosetting resin a undergoes a partial ring-opening reaction under the action of the photoinitiator, which improves the adhesion between the precoat primer layer and the leveling resin layer, and between the leveling resin layer and the 3D abrasive layer. force to improve the bond strength and stability of 3D abrasives.

Preferably, the abrasive micropowder is at least one of diamond, boron nitride, silicon carbide, alumina, and cerium oxide; and the filler is calcium carbonate, calcium silicate, copper powder, silicon powder, and glass fiber powder. At least one; the performance modifier is at least one of a defoaming agent, a leveling agent, a wetting and dispersing agent, and a thixotropic agent.

By using the above-mentioned raw materials as abrasive micropowder, the present invention has good wear resistance, so that the 3D abrasive layer has better wear resistance, and the abrasive micropowder whose interface is dulled synchronously falls off during the grinding of the abrasive tool, exposing a new sharp grinding interface. Further, the abrasive tool has always maintained good sharpness and long service life, and the service life of the abrasive tool is 5-20 times that of the traditional single-layer single-particle abrasive coated abrasive tool. The particle size is 1-80μm, which can be mixed evenly with other raw materials in the liquid slurry. The abrasive powder with dull interface is easy to fall off during grinding. If the particle size of the abrasive powder is large, it is not easy to mix with other raw materials. The overall unevenness of the liquid slurry, and the abrasive powder with blunt interface during grinding is not easy to fall off because of its larger particle size and larger particle size; falling off, reducing the polishing performance of the liquid slurry; the present invention also adopts the above-mentioned fillers, which can be mixed with other raw materials of the liquid slurry evenly, improve the bonding force, and will not affect the performance of other raw materials; the present invention also adopts the above-mentioned fillers. The performance modifier can defoaming the foam produced during the preparation of the liquid slurry, and can improve the leveling performance, dispersibility, wettability and thixotropic properties of the liquid slurry, and improve the comprehensive performance of the liquid slurry. This in turn improves the performance of 3D abrasives. Wherein, the defoamer is at least one of polydimethylsiloxane, polyether-modified silicon, and GP-type defoamer, and a more preferred defoamer is polyether-modified silicon-based defoamer ; The thixotropic agent is at least one of fumed silica, asbestos and kaolin, and the more preferred thixotropic agent is fumed silica.

Preferably, the flexible 3D abrasive tool is a flexible 3D abrasive tool with rounded corners. The present invention adopts the rounded corner design, and the adopted mold cavity is also the rounded designed mold cavity, so that when the liquid slurry is poured into the mold cavity, the gas in the mold cavity can be easily discharged from the rounded corner structure, so that the grinding tool is in the mold cavity. It is not easy to generate air bubbles during the manufacturing process, and the liquid slurry is demolded after curing and molding, and the rounded corner design ensures that there is no material residue at the corners of the mold cavity after demolding, which is beneficial to the integrity of the 3D abrasive shape and the subsequent repeated molding effect; In addition, the abrasive tool with rounded corners will not cause non-grinding scratches to the workpiece to be polished, and has wider applicability. The abrasive tool is not easy to be blocked by wear debris during the grinding process and affects the grinding effect, and has a uniform grinding effect, and the 3D abrasive tool of the present invention can be manufactured into various specifications and shapes such as flake, ring, and roll shape. Various types of grinding tools for grinding and polishing of many materials.

Another object of the present invention is achieved through the following technical solutions: a manufacturing method of the above-mentioned flexible 3D abrasive tool, comprising the following steps:

(1) Preparation of 3D abrasive layer: 90-110 parts of adhesive C, 15-35 parts of thermal curing agent, 0.1-1.5 parts of photoinitiator, 45-65 parts of abrasive micropowder, 170-190 parts of filler and 0.1-1.0 parts of Parts of the performance modifier are mixed and stirred evenly to prepare 3D abrasive, and the prepared 3D abrasive layer is poured into the molding cavity, and the first thermal curing molding is performed to prepare the 3D abrasive layer;

(2) Preparation of pre-coating primer layer: Mix and stir 90-110 parts of adhesive A, 0.1-1.5 parts of photoinitiator and 15-35 parts of thermal curing agent, and apply it to the upper surface of the flexible substrate layer , carry out the second thermosetting molding, and obtain the pre-coating primer layer;

(3) Preparation of leveling resin layer: Mix and stir 90-110 parts of leveling resin B, 0.1-1.5 parts of photoinitiator and 0.01-0.2 parts of leveling aid, and pour into the 3D abrasive obtained in step (1). At the molding surface of the layer, the molding cavity is filled and the leveling resin layer is obtained;

(4) Preparation of the first flexible 3D abrasive tool: the leveling resin layer prepared in step (3) is laminated with the pre-coating primer layer prepared in step (2), and light-cured molding is performed to prepare a preliminary 3D abrasive tool. Taste;

(5) Preparation of the finished flexible 3D abrasive tool: demoulding the preliminary 3D abrasive tool obtained in step (4), and performing the third thermal curing molding to obtain the finished 3D abrasive tool.

The present invention prepares the flexible 3D abrasive tool by adopting the above steps, the operation is simple, and the liquid in the 3D abrasive is removed by the first thermal curing molding of the 3D abrasive, the molding surface is lowered, and the molding surface is slightly lower than the horizontal surface of the molding cavity, The raw material that is conducive to the leveling resin layer is poured on the descending 3D abrasive layer forming surface, thereby ensuring the stable bonding of the leveling resin layer and the pre-coating primer layer; by pouring the leveling resin layer raw material on the 3D abrasive layer forming surface , which can fill the molding surface where the liquid level of the 3D abrasive drops due to the volatilization of the liquid. As an intermediate bond between the 3D abrasive layer and the pre-coating primer layer, the pre-coating primer layer, the leveling resin layer and the 3D abrasive can be added. The bonding performance between the layers; and through the second thermal curing molding, the pre-coating primer layer can be formed stably and can be stably bonded with the leveling resin layer, and also through the light curing molding and the third curing molding, Promote the partial ring-opening reaction of the epoxy groups in the photo-curable resin a, the photo-curable resin b and the thermo-curable resin a under the action of the photoinitiator, and promote the photo-curable resin a, the photo-curable resin b and the thermo-curable resin a. Partial cross-linking reaction occurs under the action of the thermal curing agent, thereby improving the adhesion between the pre-coating primer layer and the leveling resin layer, between the leveling resin layer and the 3D abrasive layer, and improving the adhesion of the 3D abrasive tool. Strength and stability, avoiding the phenomenon of layer separation.

Wherein, in the step (1), the stirring speed of the mixing and stirring is 500-1500rpm, the stirring temperature is 20-40°C, and the stirring time is 120-600min; the curing time of the first thermal curing molding is 1- 5min, curing temperature is 85-120℃. By strictly controlling the mixing and stirring speed, stirring temperature and stirring time of the raw materials of the 3D abrasive layer, the present invention can fully mix the liquid slurry evenly, and is convenient for bonding with the leveling resin slurry; and the 3D abrasive layer is formed by thermal curing. The liquid in the 3D abrasive layer is removed by thermal volatilization, which is convenient for bonding with the leveling resin layer, improving the bonding performance, and strictly controlling the curing time and temperature, which can fully remove the liquid in the 3D abrasive layer without affecting the 3D abrasive layer. The original properties of the raw materials.

Wherein, in the step (2), the curing time of the second thermal curing molding is 1-5 min, and the curing temperature is 85-120°C. By adopting thermal curing molding and strictly controlling the curing and molding time and temperature, the present invention enables the pre-coating primer layer to be cured and molded, and has good bonding performance, which is convenient for subsequent pressing with the leveling resin layer, so that the prepared 3D The abrasive tool has high cohesion, and there is no phenomenon of interlayer separation.

Wherein, in the step (4), the photocuring molding is ultraviolet radiation curing molding, the wavelength of the radiation light source for the ultraviolet radiation curing molding is 365-406 nm, the radiation intensity is greater than 800 mW/cm ² , and the radiation curing time is 1-3s. By adopting ultraviolet radiation curing molding, and strictly controlling the radiation wavelength, radiation intensity and radiation time, the invention can make the photocurable components in the pre-coating primer layer, the leveling resin layer and the 3D abrasive layer undergo cross-linking reaction, and Promote the partial ring-opening reaction of the epoxy groups in the photo-curable resin a, the photo-curable resin b and the thermo-curable resin a under the action of the photoinitiator, and then make the three cross-linking agents react with each other to improve the pre-coating primer layer. The bonding force between the leveling resin layer and the leveling resin layer and the 3D abrasive layer improves the bonding strength and stability of the 3D abrasive tool and avoids the phenomenon of interlayer separation.

Wherein, in the step (5), the curing time of the third thermal curing molding is 20-25h, and the curing temperature is 90-110°C. By adopting the third thermal curing molding and strictly controlling the thermal curing time and temperature, the present invention can promote the partial cross-linking reaction of the photocurable resin a, the photocurable resin b and the thermal curing resin a under the action of the thermal curing agent, thereby increasing the The adhesion between the pre-coating primer layer and the leveling resin layer, between the leveling resin layer and the 3D abrasive layer can avoid the phenomenon of interlayer separation, so that the performance of the 3D abrasive tool tends to be perfect.

The beneficial effects of the present invention are as follows: the adhesive composition of the present invention has strong cohesive force, adopts the principle of similar compatibility, realizes the mutual reaction between the light-curing resin and the heat-curing resin, and makes the layers of the 3D abrasive tool between each layer. It has strong cohesive force, so that the obtained 3D abrasive tool has high cohesive strength and stability, ensuring that the 3D abrasive tool will not have interlayer separation during use, and at the same time, the high adhesion between the layers. The knot force ensures the smooth demolding of the 3D abrasive tool from the mold cavity and avoids the phenomenon of interlayer separation during the demolding process.

Another object of the present invention is to provide a flexible 3D abrasive tool, the flexible 3D abrasive tool is formed by bonding a flexible substrate layer, a pre-coating adhesive layer, a leveling resin layer and a 3D abrasive layer to each other, so that the pre-coating The adhesive layer and the leveling resin layer and between the leveling resin layer and the 3D abrasive layer have strong bonding force, so that the 3D abrasive tool produced has high bonding strength and stability, ensuring the 3D abrasive tool. There will be no interlayer separation during use, and it combines the advantages of bonded abrasives and coated abrasives, with excellent flexibility and windability, and a wide range of applications.

The manufacturing method of the flexible 3D abrasive tool of the present invention is simple in operation. The 3D abrasive is subjected to the first thermal secondary curing molding to remove the liquid in the 3D abrasive, and the molding surface is lowered, so that the molding surface is slightly lower than the horizontal surface of the molding cavity, which is conducive to the flow of the 3D abrasive. The raw material of the leveling resin layer is poured on the descending 3D abrasive layer forming surface, so as to ensure the stable bonding between the leveling resin layer and the pre-coating primer layer; Flatten the molding surface where the liquid level of the 3D abrasive drops due to the volatilization of the liquid, as an intermediate bond between the 3D abrasive layer and the pre-coating primer layer, and increase the space between the pre-coating primer layer, the leveling resin layer and the 3D abrasive layer. and through the second thermal curing molding, the pre-coating primer layer can be formed stably and can be stably bonded with the leveling resin layer, and also through the light curing molding and the third curing molding, the light curing is promoted. The epoxy groups in resin a, photocurable resin b and thermosetting resin a undergo partial ring-opening reaction under the action of the photoinitiator, and promote the photocurable resin a, photocurable resin b and thermosetting resin a in thermal curing. Partial cross-linking reaction occurs under the action of the agent, thereby improving the bonding force between the pre-coating primer layer and the leveling resin layer, between the leveling resin layer and the 3D abrasive layer, and improving the bonding strength and stability of the 3D abrasive tool. to avoid the phenomenon of interlayer separation.

Description of drawings

1 is a schematic cross-sectional view of a flexible 3D abrasive tool of the present invention;

2 is a state diagram of the 3D abrasive layer of the present invention after curing and molding;

Fig. 3 is the state diagram of the present invention after pouring and leveling resin layer raw material;

The reference numerals are: 1—flexible substrate layer, 2—precoating primer layer, 3—leveling resin layer, 4—3D abrasive layer.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and accompanying drawings 1-3, and the contents mentioned in the embodiments are not intended to limit the present invention.

Example 1

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 2 parts

Leveling resin B 5 parts

Adhesive C 50 copies;

The adhesive A includes the following raw materials by weight:

15 parts of light-curable resin a

85 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

30 parts of photocurable resin a

70 parts of thermosetting resin a.

The photocurable resin a is epoxy acrylate; the photocurable resin b is a mixture of organic acid-modified epoxy acrylate and polyester acrylate in a weight ratio of 3:1; The cured resin a is at least one of a glycidyl ester-based epoxy resin and a glycidyl ether-based epoxy resin.

A flexible 3D abrasive tool prepared from the above-mentioned adhesive composition for flexible 3D abrasive tools, comprising a flexible substrate layer 1, a pre-coating primer layer 2, a leveling resin layer 3 and a 3D abrasive layer 4 that are sequentially attached , the lower surface of the pre-coating primer layer 2 is attached to the upper surface of the flexible substrate layer 1, the lower surface of the leveling resin layer 3 is attached to the upper surface of the pre-coating primer layer 2, so The lower surface of the 3D abrasive layer 4 is attached to the upper surface of the leveling resin layer 3 .

The pre-coating primer layer includes the following raw materials by weight:

15 parts of light-curable resin a

85 parts of thermosetting resin a

Photoinitiator 0.1 part

15 parts of heat curing agent;

The leveling resin layer includes the following raw materials in parts by weight:

100 parts of light curing resin b

Photoinitiator 0.1 part

Leveling aid 0.01 part.

The 3D abrasive layer includes the following raw materials by weight:

30 parts of light curing resin a

Thermosetting resin a 70 parts

Heat curing agent 15 parts

Photoinitiator 0.1 part

Abrasive powder 45 parts

Filler 170 parts

Performance modifier 0.1 part.

The thermal curing agent is an acid anhydride curing agent, and the acid anhydride curing agent is maleic anhydride.

The photoinitiator is a cationic photoinitiator, and the cationic photoinitiator is an iodonium salt photoinitiator.

The abrasive micropowder is diamond; the filler is silicon powder; and the performance regulator is at least one of a defoaming agent, a leveling agent, a wetting and dispersing agent, and a thixotropic agent. The defoaming agent is; the defoaming agent is a GP type defoaming agent; the thixotropic agent is asbestos.

The flexible 3D abrasive tool is a flexible 3D abrasive tool with rounded corners.

A manufacturing method of the above-mentioned flexible 3D abrasive tool, comprising the following steps:

(1) Preparation of 3D abrasive layer: Mix 30 parts of photocurable resin a, 70 parts of thermosetting resin a, 15 parts of thermosetting agent, 0.1 part of photoinitiator, 45 parts of abrasive micropowder, 170 parts of filler and 0.1 part of performance modifier Stir evenly to prepare 3D abrasive, and pour the prepared 3D abrasive layer into the molding cavity, and perform the first thermal curing molding to prepare the 3D abrasive layer;

(2) Preparation of pre-coating primer layer: Mix and stir 15 parts of photocurable resin a, 85 parts of thermosetting resin a, 0.1 part of photoinitiator and 15 parts of thermosetting agent, and apply it to the top of the flexible substrate layer. The surface is subjected to a second thermal curing molding to obtain a pre-coating primer layer;

(3) Preparation of leveling resin layer: Mix and stir 100 parts of photocurable resin b, 0.1 part of photoinitiator and 0.01 part of leveling aid, and pour it into the molding surface of the 3D abrasive layer obtained in step (1). Filling the molding cavity to obtain a leveling resin layer;

(4) Preparation of the first flexible 3D abrasive tool: the leveling resin layer prepared in step (3) is laminated with the pre-coating primer layer prepared in step (2), and light-cured molding is performed to prepare a preliminary 3D abrasive tool. Taste;

(5) Preparation of the finished flexible 3D abrasive tool: demoulding the preliminary 3D abrasive tool obtained in step (4), and performing the third thermal curing molding to obtain the finished 3D abrasive tool.

In the step (1), the stirring speed of the mixing and stirring is 500 rpm, the stirring temperature is 40°C, the stirring time is 600min, the curing time of the first thermosetting molding is 1min, and the curing temperature is 120°C;

In the step (2), the curing time of the second thermal curing molding is 1 min, and the curing temperature is 120°C;

In the step (4), the photocuring molding is ultraviolet radiation curing molding, the wavelength of the radiation light source for the ultraviolet radiation curing molding is 406 nm, the radiation intensity is greater than 800 mW/cm ² , and the radiation curing time is 1 s;

In the step (5), the curing time of the third thermal curing molding is 25h, and the curing temperature is 90°C.

Example 2

The difference between this embodiment and the above-mentioned Embodiment 1 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 3 parts

Leveling resin B 10 parts

Adhesive C 80 copies;

The adhesive A includes the following raw materials by weight:

18 parts of light-curing resin a

82 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

27 parts of photocurable resin a

73 parts of thermosetting resin a.

The photocurable resin a is epoxy acrylate; the photocurable resin b is a mixture of organic acid-modified epoxy acrylate and polyester acrylate in a weight ratio of 6:1; The cured resin a is at least one of a glycidyl ester-based epoxy resin and a glycidyl ether-based epoxy resin.

A flexible 3D abrasive tool prepared from the above-mentioned adhesive composition for flexible 3D abrasive tools, comprising a flexible substrate layer 1, a pre-coating primer layer 2, a leveling resin layer 3 and a 3D abrasive layer 4 that are sequentially attached , the lower surface of the pre-coating primer layer 2 is attached to the upper surface of the flexible substrate layer 1, the lower surface of the leveling resin layer 3 is attached to the upper surface of the pre-coating primer layer 2, so The lower surface of the 3D abrasive layer 4 is attached to the upper surface of the leveling resin layer 3 .

The pre-coating primer layer includes the following raw materials by weight:

18 parts of light-curable resin a

Thermosetting resin a 82 parts

Photoinitiator 0.35 parts.

20 parts of heat curing agent;

The leveling resin layer includes the following raw materials in parts by weight:

100 parts of light curing resin b

Photoinitiator 0.35 parts

Leveling aid 0.05 parts.

The 3D abrasive layer includes the following raw materials by weight:

27 parts of light-curable resin a

Thermosetting resin a 73 parts

Heat curing agent 20 parts

Photoinitiator 0.35 parts

Abrasive powder 50 parts

Filling 175 parts

Performance modifier 0.3 parts.

The thermal curing agent is an acid anhydride curing agent, and the acid anhydride curing agent is maleic anhydride.

The photoinitiator is a cationic photoinitiator, and the cationic photoinitiator is a ferrocene salt photoinitiator.

The abrasive micropowder is boron nitride; the filler is calcium carbonate; the performance regulator is at least one of a defoaming agent, a leveling agent, a wetting and dispersing agent, and a thixotropic agent; the defoaming agent is GP type defoamer; the thixotropic agent is asbestos.

A manufacturing method of the above-mentioned flexible 3D abrasive tool, comprising the following steps:

(1) Preparation of 3D abrasive layer: Mix 27 parts of photocurable resin a, 73 parts of thermosetting resin a, 20 parts of thermosetting agent, 0.35 part of photoinitiator, 50 parts of abrasive micropowder, 175 parts of filler and 0.3 part of performance modifier Stir evenly to prepare 3D abrasive, and pour the prepared 3D abrasive layer into the molding cavity, and perform the first thermal curing molding to prepare the 3D abrasive layer;

(2) Preparation of pre-coating primer layer: Mix and stir 18 parts of photocurable resin a, 82 parts of thermosetting resin a, 0.35 parts of photoinitiator and 20 parts of thermosetting agent, and apply it to the top of the flexible substrate layer. The surface is subjected to a second thermal curing molding to obtain a pre-coating primer layer;

(3) Preparation of leveling resin layer: Mix and stir 100 parts of photocurable resin b, 0.35 part of photoinitiator and 0.05 part of leveling aid, and pour it into the molding surface of the 3D abrasive layer obtained in step (1). Filling the molding cavity to obtain a leveling resin layer;

(4) Preparation of the first flexible 3D abrasive tool: the leveling resin layer prepared in step (3) is laminated with the pre-coating primer layer prepared in step (2), and light-cured molding is performed to prepare a preliminary 3D abrasive tool. Taste;

(5) Preparation of the finished flexible 3D abrasive tool: demoulding the preliminary 3D abrasive tool obtained in step (4), and performing a second thermal curing molding to obtain the finished 3D abrasive tool.

In the step (1), the stirring speed of the mixing and stirring is 750rpm, the stirring temperature is 35°C, the stirring time is 480min, the curing time of the first thermosetting molding is 2min, and the curing temperature is 113°C;

In the step (2), the curing time of the second thermal curing molding is 2min, and the curing temperature is 113°C;

In the step (4), the photocuring molding is ultraviolet radiation curing molding, the wavelength of the radiation light source for the ultraviolet radiation curing molding is 396 nm, the radiation intensity is greater than 800 mW/cm ² , and the radiation curing time is 2s;

In the step (5), the curing time of the third thermal curing molding is 24h, and the curing temperature is 95°C.

Example 3

The difference between this embodiment and the above-mentioned Embodiment 1 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 4 parts

Leveling resin B 15 parts

Adhesive C 120 copies;

The adhesive A includes the following raw materials by weight:

23 parts of light-curing resin a

77 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

23 parts of light-curing resin a

77 parts of thermosetting resin a.

The photocurable resin a is epoxy acrylate; the photocurable resin b is a mixture of organic acid-modified epoxy acrylate and polyester acrylate in a weight ratio of 9:1; The cured resin a is at least one of a glycidyl ester-based epoxy resin and a glycidyl ether-based epoxy resin.

A flexible 3D abrasive tool prepared from the above-mentioned adhesive composition for flexible 3D abrasive tools, comprising a flexible substrate layer 1, a pre-coating primer layer 2, a leveling resin layer 3 and a 3D abrasive layer 4 that are sequentially attached , the lower surface of the pre-coating primer layer 2 is attached to the upper surface of the flexible substrate layer 1, the lower surface of the leveling resin layer 3 is attached to the upper surface of the pre-coating primer layer 2, so The lower surface of the 3D abrasive layer 4 is attached to the upper surface of the leveling resin layer 3 .

The pre-coating primer layer includes the following raw materials by weight:

23 parts of light-curing resin a

77 parts of thermosetting resin a

Photoinitiator 0.75 parts.

25 parts of heat curing agent;

The leveling resin layer includes the following raw materials in parts by weight:

100 parts of light curing resin b

Photoinitiator 0.75 parts

Leveling aid 0.1 part.

The 3D abrasive layer includes the following raw materials by weight:

23 parts of light-curing resin a

77 parts of thermosetting resin a

Heat curing agent 25 parts

Photoinitiator 0.75 parts

Abrasive powder 55 parts

Filling 180 parts

Performance modifier 0.5 parts.

The thermal curing agent is an acid anhydride curing agent, and the acid anhydride curing agent is methylcyclohexene tetracarboxylic dianhydride.

The photoinitiator is a cationic photoinitiator, and the cationic photoinitiator is an iodonium salt photoinitiator.

The abrasive micropowder is silicon carbide; the filler is calcium silicate; the performance regulator is at least one of a defoaming agent, a leveling agent, a wetting and dispersing agent, and a thixotropic agent; the defoaming agent is Polyether modified silicon defoamer; the thixotropic agent is fumed silica.

A manufacturing method of the above-mentioned flexible 3D abrasive tool, comprising the following steps:

(1) Preparation of 3D abrasive layer: Mix 23 parts of photocurable resin a, 77 parts of thermosetting resin a, 25 parts of thermosetting agent, 0.75 parts of photoinitiator, 55 parts of abrasive micropowder, 180 parts of filler and 0.5 part of performance modifier Stir evenly to prepare 3D abrasive, and pour the prepared 3D abrasive layer into the molding cavity, and perform the first thermal curing molding to prepare the 3D abrasive layer;

(2) Preparation of pre-coating primer layer: Mix and stir 23 parts of photocurable resin a, 77 parts of thermosetting resin a, 0.75 parts of photoinitiator and 25 parts of thermosetting agent, and apply it to the top of the flexible substrate layer. The surface is subjected to a second thermal curing molding to obtain a pre-coating primer layer;

(3) Preparation of leveling resin layer: Mix and stir 100 parts of photocurable resin b, 0.75 parts of photoinitiator and 0.1 part of leveling aid, and pour it into the molding surface of the 3D abrasive layer obtained in step (1). Filling the molding cavity to obtain a leveling resin layer;

(4) Preparation of the first flexible 3D abrasive tool: the leveling resin layer prepared in step (3) is laminated with the pre-coating primer layer prepared in step (2), and light-cured molding is performed to prepare a preliminary 3D abrasive tool. Taste;

(5) Preparation of the finished flexible 3D abrasive tool: demoulding the preliminary 3D abrasive tool obtained in step (4), and performing the third thermal curing molding to obtain the finished 3D abrasive tool.

In the step (1), the stirring speed of the mixing and stirring is 1000rpm, the stirring temperature is 30°C, the stirring time is 360min, the curing time of the first thermosetting molding is 3min, and the curing temperature is 103°C;

In the step (2), the curing time of the second thermal curing molding is 3 minutes, and the curing temperature is 103°C;

In the step (4), the photocuring molding is ultraviolet radiation curing molding, the wavelength of the radiation light source for the ultraviolet radiation curing molding is 386 nm, the radiation intensity is greater than 800 mW/cm ² , and the radiation curing time is 3s;

In the step (5), the curing time of the third thermal curing molding is 23 hours, and the curing temperature is 100°C.

Example 4

The difference between this embodiment and the above-mentioned Embodiment 1 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 5 parts

Leveling resin B 18 parts

Adhesive C 160 copies;

The adhesive A includes the following raw materials by weight:

27 parts of light-curable resin a

73 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

18 parts of light-curable resin a

Thermosetting resin a 82 parts.

The photocurable resin a is epoxy acrylate; the photocurable resin b is a mixture of organic acid-modified epoxy acrylate and polyester acrylate in a weight ratio of 12:1; The cured resin a is at least one of a glycidyl ester-based epoxy resin and a glycidyl ether-based epoxy resin.

A flexible 3D abrasive tool prepared from the above-mentioned adhesive composition for flexible 3D abrasive tools, comprising a flexible substrate layer 1, a pre-coating primer layer 2, a leveling resin layer 3 and a 3D abrasive layer 4 that are sequentially attached , the lower surface of the pre-coating primer layer 2 is attached to the upper surface of the flexible substrate layer 1, the lower surface of the leveling resin layer 3 is attached to the upper surface of the pre-coating primer layer 2, so The lower surface of the 3D abrasive layer 4 is attached to the upper surface of the leveling resin layer 3 .

The pre-coating primer layer includes the following raw materials by weight:

27 parts of light-curable resin a

Thermosetting resin a 73 parts

Photoinitiator 1.1 parts.

30 parts of thermal curing agent;

The leveling resin layer includes the following raw materials in parts by weight:

100 parts of light curing resin b

Photoinitiator 1.1 parts

Leveling aid 0.15 parts.

The 3D abrasive layer includes the following raw materials by weight:

18 parts of light-curable resin a

Thermosetting resin a 82 parts

Heat curing agent 30 parts

Photoinitiator 1.1 parts

Abrasive powder 60 parts

Filling 185 parts

Performance modifier 0.7 parts.

The thermal curing agent is an acid anhydride curing agent, and the acid anhydride curing agent is methyltetrahydrophthalic anhydride.

The photoinitiator is a cationic photoinitiator, and the cationic photoinitiator is an iodonium salt photoinitiator.

The abrasive micropowder is alumina; the filler is copper powder; the performance regulator is at least one of a defoaming agent, a leveling agent, a wetting and dispersing agent, and a thixotropic agent; the defoaming agent is a polymer Dimethicone; the thixotropic agent is kaolin.

A manufacturing method of the above-mentioned flexible 3D abrasive tool, comprising the following steps:

(1) Preparation of 3D abrasive layer: Mix 18 parts of photocurable resin a, 82 parts of thermosetting resin a, 30 parts of thermosetting agent, 1.1 parts of photoinitiator, 60 parts of abrasive micropowder, 185 parts of filler and 0.7 part of performance modifier Stir evenly to prepare 3D abrasive, and pour the prepared 3D abrasive layer into the molding cavity, and perform the first thermal curing molding to prepare the 3D abrasive layer;

(2) Preparation of pre-coating primer layer: Mix and stir 27 parts of photocurable resin a, 73 parts of thermosetting resin a, 1.1 parts of photoinitiator and 30 parts of thermosetting agent, and apply it to the top of the flexible substrate layer. The surface is subjected to a second thermal curing molding to obtain a pre-coating primer layer;

(3) Preparation of leveling resin layer: Mix and stir 100 parts of photocurable resin b, 1.1 parts of photoinitiator and 0.15 parts of leveling aid, and pour them into the molding surface of the 3D abrasive layer obtained in step (1). Filling the molding cavity to obtain a leveling resin layer;

(4) Preparation of the first flexible 3D abrasive tool: the leveling resin layer prepared in step (3) is laminated with the pre-coating primer layer prepared in step (2), and light-cured molding is performed to prepare a preliminary 3D abrasive tool. Taste;

(5) Preparation of the finished flexible 3D abrasive tool: demoulding the preliminary 3D abrasive tool obtained in step (4), and performing the third thermal curing molding to obtain the finished 3D abrasive tool.

In the step (1), the stirring speed of the mixing and stirring is 1250rpm, the stirring temperature is 25°C, the stirring time is 240min, the curing time of the first thermosetting molding is 4min, and the curing temperature is 93°C;

In the step (2), the curing time of the second thermal curing molding is 4 minutes, and the curing temperature is 93°C;

In the step (4), the photocuring molding is ultraviolet radiation curing molding, the wavelength of the radiation light source for the ultraviolet radiation curing molding is 376 nm, the radiation intensity is greater than 800 mW/cm ² , and the radiation curing time is 2s;

In the step (5), the curing time of the third thermal curing molding is 21h, and the curing temperature is 105°C.

Example 5

The difference between this embodiment and the above-mentioned Embodiment 1 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 5 parts

Leveling resin B 20 parts

Adhesive C 200 copies;

The adhesive A includes the following raw materials by weight:

30 parts of light curing resin a

70 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

15 parts of light-curable resin a

85 parts of thermosetting resin a.

The photocurable resin a is epoxy acrylate; the photocurable resin b is a mixture of organic acid-modified epoxy acrylate and polyester acrylate in a weight ratio of 15:1; The cured resin a is at least one of a glycidyl ester-based epoxy resin and a glycidyl ether-based epoxy resin.

A flexible 3D abrasive tool prepared from the above-mentioned adhesive composition for flexible 3D abrasive tools, comprising a flexible substrate layer 1, a pre-coating primer layer 2, a leveling resin layer 3 and a 3D abrasive layer 4 that are sequentially attached , the lower surface of the pre-coating primer layer 2 is attached to the upper surface of the flexible substrate layer 1, the lower surface of the leveling resin layer 3 is attached to the upper surface of the pre-coating primer layer 2, so The lower surface of the 3D abrasive layer 4 is attached to the upper surface of the leveling resin layer 3 .

The pre-coating primer layer includes the following raw materials by weight:

30 parts of photocurable resin a

Thermosetting resin a 70 parts

Photoinitiator 1.5 parts.

35 parts of thermal curing agent;

The leveling resin layer includes the following raw materials in parts by weight:

100 parts of light curing resin b

1.5 parts of photoinitiator

Leveling aid 0.2 parts.

The 3D abrasive layer includes the following raw materials by weight:

15 parts of light-curable resin a

85 parts of thermosetting resin a

Heat curing agent 35 parts

1.5 parts of photoinitiator

Abrasive powder 65 parts

Filling 190 parts

Performance modifier 1.0 parts.

The thermal curing agent is an acid anhydride curing agent, and the acid anhydride curing agent is methyltetrahydrophthalic anhydride.

The photoinitiator is a cationic photoinitiator, and the cationic photoinitiator is a ferrocene salt photoinitiator.

The abrasive micropowder is cerium oxide; the filler is glass fiber powder; the performance regulator is at least one of a defoaming agent, a leveling agent, a wetting and dispersing agent, and a thixotropic agent; the defoaming agent is Polydimethylsiloxane; the thixotropic agent is kaolin.

A manufacturing method of the above-mentioned flexible 3D abrasive tool, comprising the following steps:

(1) Preparation of 3D abrasive layer: Mix 15 parts of photocurable resin a, 85 parts of thermosetting resin a, 35 parts of thermosetting agent, 1.5 parts of photoinitiator, 65 parts of abrasive micropowder, 190 parts of filler and 1.0 part of performance modifier Stir evenly to prepare 3D abrasive, and pour the prepared 3D abrasive layer into the molding cavity, and perform the first thermal curing molding to prepare the 3D abrasive layer;

(2) Preparation of pre-coating primer layer: Mix and stir 30 parts of photocurable resin a, 70 parts of thermosetting resin a, 1.5 parts of photoinitiator and 35 parts of thermosetting agent, and apply it to the top of the flexible substrate layer. The surface is subjected to a second thermal curing molding to obtain a pre-coating primer layer;

(3) Preparation of leveling resin layer: Mix and stir 100 parts of photocurable resin b, 1.5 parts of photoinitiator and 0.2 parts of leveling aid, and pour it into the molding surface of the 3D abrasive layer obtained in step (1). Filling the molding cavity to obtain a leveling resin layer;

(4) Preparation of the first flexible 3D abrasive tool: the leveling resin layer prepared in step (3) is laminated with the pre-coating primer layer prepared in step (2), and light-cured molding is performed to prepare a preliminary 3D abrasive tool. Taste;

(5) Preparation of the finished flexible 3D abrasive tool: demoulding the preliminary 3D abrasive tool obtained in step (4), and performing the third thermal curing molding to obtain the finished 3D abrasive tool.

In the step (1), the stirring speed of the mixing and stirring is 1500rpm, the stirring temperature is 20°C, the stirring time is 120min, the curing time of the first thermosetting molding is 5min, and the curing temperature is 85°C;

In the step (2), the curing time of the second thermal curing molding is 5 minutes, and the curing temperature is 85°C;

In the step (4), the photocuring molding is ultraviolet radiation curing molding, the wavelength of the radiation light source for the ultraviolet radiation curing molding is 365 nm, the radiation intensity is greater than 800 mW/cm ² , and the radiation curing time is 1 s;

In the step (5), the curing time of the third thermal curing molding is 20h, and the curing temperature is 110°C.

Comparative Example 1

The difference between this embodiment and the above-mentioned Embodiment 1 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 2 parts

Leveling resin B 5 parts

Adhesive C 50 copies;

The adhesive A includes the following raw materials by weight:

Light curing resin a 5 parts

95 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

30 parts of photocurable resin a

70 parts of thermosetting resin a.

Comparative Example 2

The difference between this embodiment and the above-mentioned Embodiment 2 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 3 parts

Leveling resin B 10 parts

Adhesive C 80 copies;

The adhesive A includes the following raw materials by weight:

40 parts of light-curing resin a

60 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

27 parts of light-curable resin a

73 parts of thermosetting resin a.

Comparative Example 3

The difference between this embodiment and the above-mentioned Embodiment 3 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 4 parts

Leveling resin B 15 parts

Adhesive C 120 copies;

The adhesive A includes the following raw materials by weight:

23 parts of light-curing resin a

77 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

40 parts of light-curing resin a

Thermosetting resin a 60 parts.

Comparative Example 4

The difference between this embodiment and the above-mentioned Embodiment 4 is:

An adhesive composition for a flexible 3D abrasive tool, comprising the following raw materials in parts by weight:

Adhesive A 5 parts

Leveling resin B 18 parts

Adhesive C 160 copies;

The adhesive A includes the following raw materials by weight:

27 parts of light-curable resin a

73 parts of thermosetting resin a;

Described leveling resin B is photocurable resin b;

The adhesive C includes the following raw materials by weight:

Light curing resin a 5 parts

95 parts of thermosetting resin a.

The performance test of the 3D abrasive tools prepared in Examples 1-5 and Comparative Examples 1-4 is shown in the following table: Test items Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Adhesive A shrinkage rate 2.8% 2.1% 0.8% 1.5% 2% 5.8% 6.2% 2.8% 2.1% Adhesive C shrinkage 2.3% 1.7% 0.6% 1.4% 2.2% 5.6% 6.4% 0.6% 1.4% 3D Abrasive Bonding Force strong strong powerful powerful strong weaker weaker weaker weaker

The shrinkage rate of the thermosetting resin a used in the present invention is 1%-3%, and the shrinkage rate of the light-curing resin b is 15%-28%. The function of Adhesive A is to stably bond the pre-coating primer layer to the flexible substrate, and to stably bond the pre-coating primer layer to the leveling resin layer; and it can be seen from the above table that when the adhesive is used When the weight part of the photocurable resin a in A is less than 15 parts (that is, the comparative example 1), the adhesive A will be heated and completely surface-dried during the thermal curing process, resulting in that the adhesive A cannot be combined with the leveling resin B. The liquid components in the liquid-liquid contact cause the pre-coating primer layer and the leveling resin layer to be unable to be cured and bonded together during the photo-curing process (under UV exposure conditions), so that the phenomenon of interlayer separation is prone to occur. ; When the weight portion of the photocurable resin a in the adhesive A is greater than 30 parts (ie, comparative example 2), the shrinkage rate of the adhesive A is greater than 5%, which will cause the adhesive A and the flexible backing. If the force is not enough, the phenomenon of interlayer separation is easy to occur.

In addition, the function of the leveling resin B is to stably bond the leveling resin layer to the pre-coating primer layer, and to stably bond the leveling resin layer to the 3D abrasive layer. Among them, the photocurable resin b in the leveling resin B In the process of light curing (under UV exposure), it is instantly cured (cured within 3s), which can be bonded and fixed with the pre-coating primer layer and the 3D abrasive layer respectively, so as to facilitate the peeling of the first 3D abrasive from the molding cavity, so that it can be To achieve assembly line production, high production efficiency.

In addition, the functions of the adhesive C are: 1. As a binder in the raw material of the 3D abrasive layer, it can consolidate the abrasive micropowder together; 2. It can cross-link with the leveling resin B to ensure that the leveling resin layer and the The bonding strength between the 3D abrasive layers, so that the final molded 3D abrasive can be easily peeled from the molding cavity; and it can be seen from the above table that when the weight part of the photocurable resin a in the adhesive C is greater than 30 (Comparative example 3), the shrinkage rate of adhesive C is greater than 5%. On the one hand, the internal stress of the 3D abrasive layer will be too large, which will affect the wear resistance and life of the abrasive tool. On the other hand, the larger shrinkage rate Causes shrinkage, and then the shape of the 3D abrasive changes, and the preset shape cannot be obtained; when the weight part of the photocurable resin a in the adhesive C is less than 15 parts (that is, the comparative example 4), the adhesive C will be in the During the thermal curing process, it is heated and completely surface-dried, so that the adhesive C cannot have liquid-liquid contact with the liquid components in the leveling resin B, resulting in the 3D abrasive layer and the leveling resin layer in the photocuring process (UV exposure). conditions) cannot achieve co-curing and bonding, which affects the bonding performance and is prone to the phenomenon of interlayer separation.

The above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways, and any obvious replacements are within the protection scope of the present invention without departing from the concept of the present invention.

Claims (5)

1. a kind of manufacturing method of flexibility 3D grinding tool, characterized by the following steps:

(1) 3D abrasive material is prepared: by C, 15-35 parts of thermal curing agents of 90-110 parts of adhesives, 0.1-1.5 parts of photoinitiators, 45-65 Part abrasive micro-powder, 170-190 parts of fillers and 0.1-1.0 parts of properties modifiers are mixed evenly, and 3D abrasive material are made, and will be made 3D abrasive material be perfused into shaping mold cavity, carry out first time heat cure molding, be made 3D abrasive material；

(2) preparation precoating primer layer: A, 0.1-1.5 parts of photoinitiators of 90-110 parts of adhesives and 15-35 parts of thermal curing agents are mixed Conjunction stirs evenly, and is applied to the upper surface of flexible substrate layer, carries out second of heat cure molding, and precoating primer layer is made；

(3) it prepares levelling resin layer: 90-110 parts of levelling resin Bs, 0.1-1.5 parts of photoinitiators and 0.01-0.2 parts of levellings is helped Agent is mixed evenly, and is poured at the forming surface of 3D abrasive material made from step (1), fills and leads up shaping mold cavity, and levelling is made Resin layer；

(4) flexibility 3D grinding tool first product is prepared: by levelling resin layer made from step (3) and step (2) precoating primer layer obtained Pressing carries out Stereolithography, and flexibility 3D grinding tool first product is made；

(5) it prepares flexibility 3D grinding tool finished product: 3D grinding tool first product made from step (4) is demoulded, carry out third time heat cure molding, Flexibility 3D grinding tool finished product is made；

The flexibility 3D grinding tool includes the flexible substrate layer being successively bonded, precoating primer layer, levelling resin layer and 3D abrasive material, institute The lower surface for stating precoating primer layer is bonded with the upper surface of the flexible substrate layer, the lower surface of the levelling resin layer and precoating The upper surface of primer layer is bonded, and the lower surface of the 3D abrasive material is bonded with the upper surface of levelling resin layer；

Wherein, adhesive A, levelling resin B, the parts by weight dosage of adhesive C used by above-mentioned flexibility 3D grinding tool are as follows:

2-5 parts of adhesive A

1-20 parts of levelling resin B

50-200 parts of adhesive C；

The adhesive A includes the raw material of following parts by weight:

15-30 parts of light-cured resin a

70-85 parts of heat reactive resin a；

The levelling resin B is light-cured resin b；

The adhesive C includes the raw material of following parts by weight:

15-30 parts of light-cured resin a

70-85 parts of heat reactive resin a；

The light-cured resin a is with weight ratio by modified with organic acids epoxies acrylate and polyester acrylate for 3-15:1 The mixture of group composition；The light-cured resin b is epoxies acrylate, and the heat reactive resin a is glycidol esters At least one of epoxy resin and glycidyl ether type epoxy resin.

2. a kind of manufacturing method of flexibility 3D grinding tool according to claim 1, it is characterised in that: the thermal curing agents are acid Anhydride curing agent, the acid anhydride type curing agent are methyl tetrahydrophthalic anhydride, methylcyclohexene tetracid dianhydride, maleic two At least one of acid anhydrides；The photoinitiator is cation light initiator, and the cation light initiator is that salt compounded of iodine light draws Send out at least one of agent, iron arene complexes photoinitiator.

3. a kind of manufacturing method of flexibility 3D grinding tool according to claim 1, it is characterised in that: the abrasive micro-powder is gold At least one of hard rock, boron nitride, silicon carbide, aluminium oxide, cerium oxide；The filler is calcium carbonate, calcium silicates, copper powder, silicon At least one of powder, glass powder；The properties modifier be defoaming agent, levelling agent, wetting dispersing agent, in thixotropic agent at least It is a kind of.

4. a kind of manufacturing method of flexibility 3D grinding tool according to claim 1, it is characterised in that: the flexibility 3D grinding tool is The flexible 3D grinding tool of fillet.

5. a kind of manufacturing method of flexibility 3D grinding tool according to claim 1, it is characterised in that: in the step (1), institute The mixing speed for stating mixing is 500-1500rpm, and whipping temp is 20-40 DEG C, mixing time 120-600min, described First time heat cure molding curing time is 1-5min, and solidification temperature is 85-120 DEG C；

In the step (2), second of heat cure molding curing time is 1-5min, and solidification temperature is 85-120 DEG C；

In the step (4), the Stereolithography is uv radiation curing molding, and the uv radiation curing is molding Radiating light source wavelength is 365-406nm, and radiation intensity is greater than 800mW/cm², the radiation curing time is 1-3s；

In the step (5), the third time heat cure molding curing time is 20-25h, and solidification temperature is 90-110 DEG C.