阅读说明：本技术 一种高强度超柔软砂带及其制备方法 (High-strength super-soft abrasive belt and preparation method thereof ) 是由 卢武 张晓月 戴杰 司文元 刘哲 富凯 齐守保 宋强 赵艳玲 于 2020-12-23 设计创作，主要内容包括：本发明涉及一种高强度超柔软砂带,包括基材、底胶、磨料、复胶及超涂层；基材采用高湿模量人造丝处理的布基；底胶为在基材上涂覆的酚醛改性树脂；底胶植有磨料；磨料涂覆复胶及超涂层；其中,超涂层包括：改性酚醛100份；PVA5-20份；丙烯酸乳液5-20份；吸热材料5-50份；润滑材料1-5份。本发明提供的高强度超柔软砂带,采用高湿模量人造丝处理的布基作为基材提高了砂带的拉伸强度,保证了柔软布砂带在金属抛光磨削时不会断裂；同时复胶提高了粘结强度及扛冲击性,在砂带磨削过程中起到促进磨削、降温、防堵塞等作用；超涂层可以起到吸热、防堵塞,防止磨削烧伤工件的效果。本发明还涉及一种高轻度超柔软砂带的制备方法。(The invention relates to a high-strength super-soft abrasive belt which comprises a base material, a primer, an abrasive, a compound adhesive and a super coating; the base material adopts a cloth base treated by high wet modulus rayon; the primer is phenolic modified resin coated on a base material; the bottom glue is planted with abrasive; coating the abrasive with compound glue and super coating; wherein, the super coating includes: 100 parts of modified phenolic aldehyde; 5-20 parts of PVA; 5-20 parts of acrylic emulsion; 5-50 parts of heat absorbing material; 1-5 parts of lubricating material. According to the high-strength super-soft abrasive belt provided by the invention, the cloth base treated by the high-wet-modulus rayon is used as the base material, so that the tensile strength of the abrasive belt is improved, and the soft cloth abrasive belt is prevented from being broken during metal polishing and grinding; meanwhile, the compound glue improves the bonding strength and the carrying impact property, and plays roles of promoting grinding, cooling, preventing blockage and the like in the abrasive belt grinding process; the super-coating can absorb heat, prevent blocking up, prevent the effect of grinding burn work piece. The invention also relates to a preparation method of the high-light degree super-soft abrasive belt.)

1. A high-strength super-soft abrasive belt is characterized by comprising a base material, a primer, an abrasive, a compound adhesive and a super coating;

the base material adopts a cloth base treated by high wet modulus rayon;

the primer is phenolic modified resin coated on the base material;

the bottom glue is planted with the abrasive; the abrasive material coats the compound glue and the super coating;

wherein the super-coating comprises:

2. a high strength super soft abrasive belt according to claim 1, wherein said heat absorbing material is added sodium fluoride in phenolic resin as filler of super coating.

3. A high strength super soft abrasive belt according to claim 1, wherein said lubricating material is zinc stearate and polyester powder.

4. A high strength super soft abrasive belt according to claim 1, wherein said compound comprises:

5. the high strength ultra soft abrasive belt according to claim 4, wherein the auxiliary agent comprises at least one of a silicone defoamer, a cationic wetting agent, and a silane coupling agent.

6. The high strength ultra soft abrasive belt of claim 4, wherein the active filler comprises at least one of calcium carbonate, kaolin, calcium silicate, cryolite, and quartz powder.

7. The high strength ultra soft abrasive belt according to claim 1, wherein the abrasive is high performance calcined semi-brittle corundum with surface coated with corundum.

8. Method for manufacturing a high strength ultra soft abrasive belt according to any of claims 1-7, comprising:

s1, unwinding the base material;

s2, coating a base glue on the base material, and implanting an abrasive on the base glue;

s3, coating the compound glue and the super coating on the abrasive material;

wherein the base material adopts a cloth base treated by high wet modulus rayon;

the primer is phenolic modified resin coated on the base material;

the super-coating comprises:

9. a method for making a high strength ultra soft abrasive belt according to claim 8,

the drying temperature of the primer is 80-100 ℃, and the drying time is 1.5-2 h;

the drying temperature of the compound adhesive is 90-110 ℃, and the drying time is 1-2 h;

the drying temperature of the super-coating is 90-120 ℃, and the drying time is 1-2 hours.

10. A method for making a high strength super soft abrasive belt according to claim 9, wherein said substrate is a cloth substrate treated with high wet modulus rayon, comprising:

adopting rayon as a cloth base raw material for weaving;

performing surface treatment, namely removing fluff on the surface of the cloth substrate;

stretching the fabric base, wherein the warp direction tensile strength is 1150-1250N/5 cm, and the weft direction strength is 450-500N/5 cm, so as to reduce the fabric base elongation;

dipping the cloth base through a dipping tank containing sizing materials;

coating the cloth base by a coating machine;

and performing calendaring treatment and winding on the cloth base to obtain the treated cloth base.

Technical Field

The invention relates to the technical field of grinding wheels, in particular to a high-strength super-soft abrasive belt and a preparation method thereof.

Background

At present, the main soft cloth-based coated abrasive tool products in domestic markets are widely applied to the fields of decoration, paint grinding in the household industry, automobile polishing and the like, and mainly comprise middle and low-end products. The demand for soft and high-strength abrasive belts in high-end fields such as polishing of alloy precision instruments and precision tools is increasing. The domestic technology of soft cloth abrasive belt products with softness and high strength is not broken through all the time.

Therefore, there is a need to develop a high strength ultra-soft abrasive belt and a method for making the same to solve the above problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a high-strength super-soft abrasive belt and a preparation method thereof.

The technical scheme of the invention is summarized as follows:

the invention provides a high-strength super-soft abrasive belt which comprises a base material, a primer, an abrasive, a compound adhesive and a super coating, wherein the base material is a base material;

the base material adopts a cloth base treated by high wet modulus rayon;

the primer is phenolic modified resin coated on the base material;

the bottom glue is planted with the abrasive; the abrasive material coats the compound glue and the super coating;

wherein the super-coating comprises:

further, the heat absorbing material is used as a filler of the super coating, and sodium fluoride is added into the phenolic resin.

Further, the lubricating material is zinc stearate and polyester powder.

Further, the compound glue comprises:

further, the auxiliary agent at least comprises one of an organic silicon defoaming agent, a cationic wetting agent and a silane coupling agent.

Further, the active filler includes at least one of calcium carbonate, kaolin, calcium silicate, cryolite, and quartz powder.

Furthermore, the grinding material is high-performance calcined semi-brittle corundum with the surface plated with corundum.

Correspondingly, the invention also provides a preparation method of the high-strength super-soft abrasive belt, which is used for manufacturing the high-strength super-soft abrasive belt, and comprises the following steps:

s1, unwinding the base material;

s2, coating a base glue on the base material, and implanting an abrasive on the base glue;

s3, coating the compound glue and the super coating on the abrasive material;

wherein the base material adopts a cloth base treated by high wet modulus rayon;

the primer is phenolic modified resin coated on the base material;

the super-coating comprises:

further, the drying temperature of the primer is 80-100 ℃, and the drying time is 1.5-2 hours;

the drying temperature of the compound adhesive is 90-110 ℃, and the drying time is 1-2 h;

the drying temperature of the super-coating is 90-120 ℃, and the drying time is 1-2 hours.

Further, the process of using the cloth base treated by the high wet modulus rayon to the base material comprises the following steps:

adopting rayon as a cloth base raw material for weaving;

performing surface treatment, namely removing fluff on the surface of the cloth substrate;

stretching the fabric base, wherein the warp direction tensile strength is 1150-1250N/5 cm, and the weft direction strength is 450-500N/5 cm, so as to reduce the fabric base elongation;

dipping the cloth base through a dipping tank containing sizing materials;

coating the cloth base by a coating machine; and performing calendaring treatment and winding on the cloth base to obtain the treated cloth base.

Compared with the prior art, the invention has the beneficial effects that:

according to the high-strength super-soft abrasive belt provided by the invention, the cloth base treated by the high-wet-modulus rayon is used as the base material, so that the tensile strength of the abrasive belt is improved, and the soft cloth abrasive belt is prevented from being broken during metal polishing and grinding; meanwhile, the compound glue improves the bonding strength and the carrying impact property, and plays roles of promoting grinding, cooling, preventing blockage and the like in the abrasive belt grinding process; the super-coating can absorb heat, prevent blocking up, prevent the effect of grinding burn work piece.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic structural view of a high strength super soft abrasive belt according to the present invention.

Description of reference numerals:

1. a substrate; 2. base glue; 3. an abrasive; 4. compounding glue; 5. and (4) super coating.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

The invention provides a high-strength super-soft abrasive belt which comprises a base material 1, a primer 2, an abrasive 3, a compound adhesive 4 and a super-coating 5. The weight ratio of the base glue 2 to the compound glue 4 is 0.75.

The base material 1 adopts a cloth base treated by high wet modulus rayon; the primer 2 is phenolic modified resin coated on the base material 1; the base glue 2 is planted with an abrasive 3; the grinding material 3 is coated with a compound glue 4 and a super coating 5; wherein, super coating 5 includes:

in particular, in the super-coating 5, the proper proportion of the modified phenolic aldehyde and the acrylic acid is the guarantee for realizing high strength and softness. The acrylic emulsion is an acrylic emulsion with ultra-low TG, and the glass transition temperature of the acrylic emulsion with ultra-low TG ranges from-20 to-10. Specifically, the modified phenolic aldehyde is prepared by adding an alkylphenol modifier to graft flexible long-chain molecules with toughness onto a phenolic resin main chain, so that the phenolic aldehyde is connected with the flexible long chain, and then the modified phenolic aldehyde is prepared with formaldehyde.

The heat-absorbing material is used as a filler of the super-coating, and the heat-absorbing material is prepared by adding sodium fluoride into phenolic resin. The weight parts of the phenolic resin and the sodium fluoride are 100: 5-50; preferably, other fluoride salts, such as synthetic cryolite, calcium fluoride and the like, can be added into the filler to improve the heat absorption effect, provide the functions of melting and lubricating and prevent the grinding of burnt workpieces.

The lubricating material is zinc stearate and polyester powder. The cutting performance of the abrasive belt can be improved by adding polyester powder into zinc stearate which is used as a common lubricant, preferably, the weight ratio of the zinc stearate to the polyester powder is 1:1, and after multiple tests, the ratio of the zinc stearate to the polyester powder is 1:1, the abrasive belt has better softness and cutting performance.

The modified phenolic aldehyde is used as a binder of the super-coating, polyvinyl alcohol PVA and ultralow TG acrylic emulsion are added, the binder proportion is preferably selected, when the proportion is 20:1-4:1-4, the binding performance is best, and the strength of the obtained abrasive belt is optimal.

In addition, 1-10 parts of pigment can be added into the super-coating 5 according to individual requirements.

The super-coating 5 with reasonable ingredients can absorb heat, prevent blockage and prevent a burn workpiece from being ground, and the softness and the cutting performance of the abrasive belt are improved.

Specifically, the primer 2 is made of modified phenolic resin, flexible long-chain molecules with toughness are grafted to a phenolic resin main chain by adding an alkylphenol modifier into the modified phenolic resin, so that the phenolic resin is connected with the flexible long chain, and then the modified phenolic resin is prepared from formaldehyde, so that the softness and the bonding strength can be considered at the same time. The test data for various primer formulations of the present invention are as follows:

the phenolic modified resin is better from the chart. Its advantages are high flexibility, toughness, adhesion, water and oil resistance, stable size and good wettability to abrasive and substrate.

The compound glue 4 comprises: 60-100 parts of phenolic resin; 5-30 parts of a non-reactive toughening agent; 50-80 parts of active filler; 0.1-0.5 part of assistant. Specifically, the non-reactive toughener is a polyether polyol.

The phenolic resin is an important binder of the coated abrasive tool, but in the invention, not only the bonding performance is considered, but also different types of fillers and other auxiliary agents are required to be added to improve the impact resistance, improve the heat resistance and reduce the cost, wherein the active filler is an inorganic filler, the active filler comprises at least one of calcium carbonate, kaolin, calcium silicate, cryolite and quartz powder, and the active filler can play roles of promoting grinding, cooling, preventing blockage and the like in the grinding process.

Wherein, the auxiliary agent at least comprises one of an organic silicon defoaming agent, a cation wetting agent and a silane coupling agent. The phenolic resin mainly has the effects of wetting a base material, improving the bonding strength of an abrasive and a bonding agent, improving the wettability and the dispersibility of a filler in the phenolic resin and the like.

The abrasive is high-performance calcined semi-brittle corundum with corundum plated on the surface.

Correspondingly, the invention also provides a preparation method of the high-strength super-soft abrasive belt, which is used for manufacturing the high-strength super-soft abrasive belt, and comprises the following steps:

s1, unwinding the base material 1;

s2, coating a base material 2 on the base material 1, and implanting an abrasive material 3 on the base material 2;

s3, coating a compound adhesive 4 and a super coating 5 on the grinding material 3;

wherein, the base material in S1 adopts a cloth base treated by high wet modulus rayon;

the primer in the S2 is phenolic modified resin coated on the base material;

the super-coating in S3 includes:

drying the primer at the temperature of 80-100 ℃ for 1.5-2 h;

drying the compound adhesive at the temperature of 90-110 ℃ for 1-2 h;

the drying temperature of the super coating is 90-120 ℃, and the drying time is 1-2 h.

The process of treating cloth base with high wet modulus rayon includes the following steps:

(1) weaving by using high wet modulus rayon as a cloth base raw material;

(2) performing surface treatment, namely removing fluff on the surface of the cloth substrate;

(3) stretching the cloth base, wherein the warp direction tensile strength is 1150-1250N/5 cm; the weft strength is 450-500N/5 cm, so that the fabric base elongation is reduced;

(4) dipping the cloth base through a dipping tank containing sizing materials; after dipping, drying the cloth base at 80-95 ℃, and then shaping at 170-185 ℃;

(5) coating the cloth base by a coating machine; after blade coating, drying the cloth base at 80-95 ℃;

(6) and performing calendaring treatment and winding on the cloth base to obtain the treated cloth base.

In the specific step (1), the fabric base is made of rayon, double-strand air-jet spun yarns are adopted in the warp direction, a thick-thin alternating doubling mode is adopted in the weft direction, the weaving tissue is 2/1 satin, and the weaving density is 90-100 multiplied by 40-60.

The high wet modulus rayon (rayon) is adopted for weaving, and is characterized by high strength, low elongation, high wear resistance and soft texture; the warp direction adopts double-strand air flow spinning yarns, the weft direction adopts a thickness alternating doubling mode, the weaving structure is 2/1 satin, the density of a cloth base is 90-100 x 40-60, the yarn count is (16-40)/2 x 16-30, the gram weight is less than 190G/CM2, the thickness is more than 0.3MM, the warp direction strength is more than 1200N, the weft direction strength is more than 450N, and the warp direction air flow weft direction ring spindle is adopted.

The cloth base passes through a singeing machine, and the singeing machine adjusts the surface treatment process through the distance between a fire hole and the cloth base and the flame intensity to achieve the purpose of removing surface fluff.

In the step 3), the fabric base passes through a stretcher, the warp stretching rate is 6% -12%, and the weft shrinkage rate is 8% -20%, so that the purpose of reducing the elongation rate is achieved. The warp strength of the stretched cloth base is 1150-1250N/5 cm; the weft strength is 450-500N/5 cm, and the soft cloth abrasive belt is prevented from being broken during metal polishing and grinding.

Preferably, in the step 4), the sizing material comprises the following materials:

10-30 parts by weight of modified resin;

70-90 parts by weight of an emulsion;

0.1-1 part by weight of a penetrant;

the viscosity of the sizing material is 10 CPS-200 CPS, the pH value is 7-8, and the optimal pH value is more than 7 and less than 8.

In the steps, the low-boiling-point solvent is removed through drying, then the impregnated rubber material is solidified and formed through high-temperature shaping, the obtained rubber material layer is compact and uniform, and the defect that the low-boiling-point solvent is quickly gasified to form the rubber material layer through direct high-temperature drying is avoided, so that the rubber material layer is easy to fall off at the later stage. And at the drying temperature, the modified resin, the emulsion and the penetrating agent in the sizing material are combined with the rayon.

Preferably, in the step 5), the coating used for the coating of the cloth substrate by the coating machine comprises the following materials:

the viscosity of the coating is 1000 CPS-10000 CPS, and the pH value is more than 7 and less than 8.

The coating with the components is adopted to carry out size scraping on the grey cloth, the gap between the cloth base and a scraper of a coating machine is adjusted to control the size of the front side to be 40g/cm2, and the size of the back side to be 50g/cm 2.

Preferably, the modified resin is any one or a mixture of more than two of urea-formaldehyde resin, phenolic resin, melamine resin and acrylic resin.

Preferably, the emulsion is one or a mixture of more than two of butyronitrile, butylbenzene, white latex, acrylic acid, polyvinyl chloride and polyurethane.

Preferably, the filler is one or a mixture of more than two of calcium carbonate, wollastonite, talcum powder and calcium sulfate.

Preferably, the pigment is any one of metal oxide, sulfide, sulfate, inorganic salt, carbon black or phthalocyanine dye.

Specifically, in the step 4), 10-30 parts by weight of modified resin, 70-90 parts by weight of emulsion and 0.1-1 part by weight of penetrant are taken according to the specific gravity, so that the sizing material fully enters the interior of the fiber, the viscosity is adjusted to be 10 CPS-200 CPS, the pH value is 6-8, the mixture is continuously and uniformly stirred and injected into an impregnation tank, the cloth base is bound by the impregnation tank under certain extrusion pressure to be 3BAR-5BAR, the mixture is fully impregnated, so that the sizing material fully enters the fiber, and then the mixture is dried for 3MIN at 70-160 ℃ through a rainbow bridge. Then the blank is put into a drying room for high-temperature setting for 3MIN at the temperature of 160 plus 190 ℃ and is rolled. Wherein the emulsion is pure acrylic emulsion, and the penetrating fluid is an anion penetrating agent.

Taking 10-30 parts by weight of modified resin, 70-90 parts by weight of emulsion, 10-50 parts by weight of filler, 0.1-1 part by weight of defoaming agent, 0.1-1 part by weight of wetting agent and 1-5 parts by weight of pigment according to the specific gravity in the step 5); adjusting the viscosity of the coating to 1000 CPS-10000 CPS, adjusting the pH value to be more than 7, continuously stirring uniformly, injecting the mixture into a coating machine, scraping the cloth base to 40-100g/cm2 through a scraper at a certain gap, drying the cloth base for 3MIN through a rainbow bridge at the temperature of 70-160 ℃, and then rolling.

According to the high-strength super-soft abrasive belt provided by the invention, the cloth base treated by the high-wet-modulus rayon is used as the base material, so that the tensile strength of the abrasive belt is improved, and the soft cloth abrasive belt is prevented from being broken during metal polishing and grinding; meanwhile, the compound glue improves the bonding strength and the carrying impact property, and plays roles of promoting grinding, cooling, preventing blockage and the like in the abrasive belt grinding process; the super-coating can absorb heat, prevent blocking up, prevent the effect of grinding burn work piece.

See in particular the examples below.

Example 1:

the base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 5g of non-reactive toughening agent, 50g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; the super-coating comprises: 100g of modified phenolic aldehyde, 5g of PVA, 5g of ultralow TG acrylic emulsion, 5g of heat absorbing material and 5g of lubricating material. Specifically, the heat absorbing material included 4.76g of phenol resin and 0.24g of sodium fluoride, and the lubricating material included 1g of zinc stearate and 1g of polyester powder.

Example 2:

the base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 15g of non-reactive toughening agent, 65g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; the super-coating comprises: 100g of modified phenolic aldehyde, 12g of PVA, 12g of ultralow TG acrylic emulsion, 28g of heat absorbing material and 3g of lubricating material. Specifically, the heat absorbing material includes 5g of phenol resin, 0.26g of sodium fluoride, and the lubricating material includes 1.5g of zinc stearate and 1.5g of polyester powder.

Example 3:

the base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 15g of non-reactive toughening agent, 65g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; the super-coating comprises: 100g of modified phenolic aldehyde, 20g of PVA, 20g of ultralow TG acrylic emulsion, 50g of heat absorbing material and 5g of lubricating material. Specifically, the heat absorbing material included phenol resin 10, sodium fluoride 0.52g, and the lubricating material included zinc stearate 2.5g and polyester powder 2.5 g.

Example 4:

the primer used was not modified phenolic as compared to example 2.

The base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 15g of non-reactive toughening agent, 65g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; the super-coating comprises: 100g of modified phenolic aldehyde, 12g of PVA, 12g of ultralow TG acrylic emulsion, 28g of heat absorbing material and 3g of lubricating material. Specifically, the heat absorbing material includes 5g of phenol resin, 0.26g of sodium fluoride, and the lubricating material includes 1.5g of zinc stearate and 1.5g of polyester powder.

Example 5:

relative to example 3, no ultra low TG acrylic emulsion was used in the supercoat.

The base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 15g of non-reactive toughening agent, 65g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; the super-coating comprises: 100g of modified phenolic aldehyde, 20g PVA, 50g of heat absorbing material and 5g of lubricating material. Specifically, the heat absorbing material includes a heat absorbing material including a phenol resin 10, sodium fluoride 0.52g, and a lubricant including zinc stearate 2.5g and polyester powder 2.5 g.

Example 6:

relative to example 3, no modified phenolic was used in the super-coating.

The base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 15g of non-reactive toughening agent, 65g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; the super-coating comprises: 100g of common phenolic aldehyde, 20 of PVA, 12g of ultra-low TG acrylic emulsion, 50g of heat absorbing material and 5g of lubricating material. Specifically, the heat absorbing material includes a phenol resin 10, and the sodium fluoride 0.52g of the lubricant material includes zinc stearate 2.5g and polyester powder 2.5 g.

Comparative example 1:

the base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 5g of non-reactive toughening agent, 50g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; no super coating.

Comparative example 2:

the base material is a cloth base treated by high wet modulus rayon; the primer adopts modified phenolic resin; the grinding material is high-performance calcined semi-brittle corundum with corundum plated on the surface; the compound glue comprises: 100g of phenolic resin, 15g of non-reactive toughening agent, 65g of calcium carbonate, 0.1g of organic silicon defoaming agent, 0.1g of anionic wetting agent and 0.1g of silane coupling agent; no super coating.

The experimental data of the above examples and comparative examples are shown in the following table.

As can be seen from the above table, the abrasive belt with high strength and super softness can be realized by using the modified phenolic aldehyde in the primer and using the reasonable proportion of the modified phenolic aldehyde and the ultralow TG acrylic emulsion in the super coating.

The cloth base processing method adopted in the embodiment is to weave by adopting rayon as a cloth base raw material; performing surface treatment to remove fluff on the surface of the cloth substrate; passing the fabric base through a stretcher, wherein the warp stretching rate is 12 percent, and the weft shrinkage rate is 20 percent; dipping the cloth base through a dipping tank containing sizing materials; after impregnation, the cloth base is dried at 90 ℃ and then shaped at a high temperature of 190 ℃; the sizing material comprises 10 parts by weight of modified resin; 70 parts of emulsion; 0.1 part by weight of penetrant; the viscosity of the sizing material is 10CPS, and the pH value is 6; coating the cloth base by a coating machine; after blade coating, the cloth base is dried at 70 ℃; the coating used for blade coating of the coating machine comprises 10 parts by weight of modified resin; 70 parts of emulsion; 10 parts of a filler; 0.1 part by weight of defoaming agent; 0.1 part by weight of wetting agent; 1 part by weight of pigment; the viscosity of the coating is 1000CPS, and the pH value is 8; and performing calendaring treatment and winding on the cloth base to obtain the treated cloth base.

According to the high-strength super-soft abrasive belt provided by the invention, the cloth base treated by the high-wet-modulus rayon is used as the base material, so that the tensile strength of the abrasive belt is improved, and the soft cloth abrasive belt is ensured not to be broken during metal polishing and grinding; meanwhile, the compound glue improves the bonding strength and the carrying impact property, and plays roles of promoting grinding, cooling, preventing blockage and the like in the abrasive belt grinding process; the super-coating can absorb heat, prevent blocking up, prevent the effect of grinding burn work piece.

While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.