JP2019183095A - Adhesive powder, manufacturing method of adhesive tablet, adhesive tablet, and manufacturing method of member or component using the adhesive powder and tablet - Google Patents

Abstract

To provide an adhesive powder capable of achieving operation environment property and component separation resistance since excellent temporary tacking performance and it is easy to make a tablet, a manufacturing method of an adhesive tablet, the adhesive tablet, and a manufacturing method of a member or a content using the adhesive powder and tablet.SOLUTION: There is provided an adhesive powder containing a binder (A) containing at least a ceramic resin, a plasticizer (B), a lubricant (C) and at least one kind of assistant (D) selected from an inorganic compound and a crosslinking resin, a manufacturing method of an adhesive tablet using the adhesive powder and the adhesive tablet, and a manufacturing method of a member or a component using the adhesive powder and the tablet.SELECTED DRAWING: None

Description

  The present invention relates to an adhesive powder, an adhesive tablet manufacturing method, an adhesive tablet, and a member or component manufacturing method using the adhesive powder and tablet.

  Adhesives are various members or parts used in various applications such as home appliances, various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, and automotive equipment. It is used in various applications, such as various industrial applications such as manufacturing. Needless to say, the original performance required of adhesives is adhesiveness, but depending on the application, it exhibits adhesiveness when temporarily fixing various parts, and exhibits exfoliation properties when it is subsequently peeled off. Performance (hereinafter, sometimes referred to as “temporary fixing performance”) may be required. For example, an optical lens is temporarily fixed to a support, and various mechanical processes such as cutting, polishing, cutting, and grinding are performed to obtain a predetermined shape and surface property, and then peeled from the support. The adhesive used in the production of the optical lens is required to have a temporary fixing performance.

  In addition, when performing mechanical processing such as cutting on a magnetic body such as a magnet, it is temporarily fixed to the support and mechanically processed to obtain a predetermined shape and surface properties, and then peeled off from the support. In order to produce, the adhesive used for such a use is also required to have a temporary fixing performance. In addition to mechanical processing of magnetic materials such as optical lenses and magnets, cutting, polishing, cutting and grinding of parts such as wafers and various parts formed of sapphire, gallium arsenide, quartz, metal, glass, resin, etc. In various mechanical processes such as the above, an adhesive having a temporary fixing performance (hereinafter sometimes referred to as “temporary adhesive”) may be desired.

  As the temporary fixing adhesive used in these mechanical processes, a solid type (for example, Patent Document 1) and a powder type (for example, Patent Document 2) are mainly used. The adhesive described in Patent Document 1 is a solid type adhesive composed of a mixture of shellac 60 to 80% by weight and rosin 40 to 20% by weight, and the adhesive described in Patent Document 2 is a shellac resin. A powder adhesive composition comprising: a resin powder comprising a main component of benzene, and at least one compound selected from predetermined benzoic acid esters, alkylbenzenesulfonamides and cyclic alcohol esters of maleic acid, It is.

Japanese Unexamined Patent Publication No. 7-179842 JP 2007-254571 A

  By the way, while technological development related to the above-mentioned various devices is made thinner, smaller, lighter, etc., various parts used in these devices are required to be thinner, smaller, lighter, etc. Yes. In addition, the shapes of various parts are complicated, and for example, round bars, spheres, and other parts having an uneven surface are used. The component having such a shape has a very small bonding area because the bonding with the support is not a surface but a point or a line contact.

  Since the solid-type adhesive as described in Patent Document 1 is used by being pressed onto a heated support and thermally melted and applied, the coating thickness is likely to vary. Adhesive failure is likely to occur due to variations in the film thickness of the adhesive. Also, along with the downsizing and complication of the shape of various parts, for example, when bonding parts whose shape has an uneven surface, the adhesive does not reach the surface of the recess, resulting in poor adhesion, resulting in remarkable adhesion. descend. For this, sufficient attention can be paid to the application of the adhesive to form a uniform film thickness of the adhesive, but the work load is extremely large, and the work efficiency is significantly reduced.

  As described in Patent Document 2, a powder type adhesive is usually used by being dispersed on a heated support, and the adhesive film thickness variation is larger than that of a solid type adhesive. Since it is easy to reduce, it may be possible to cope with the recent downsizing and complexity of various parts. However, there are cases where it is impossible to cope with the complexity of the shapes of various parts, and there is a demand for an adhesive that can cope with any shape of various parts and exhibit excellent temporary fixing performance.

In addition, powder type adhesives are scattered during handling and the working environment is likely to deteriorate, so it is not an advantageous form especially when the working environment is strictly demanded. When transporting, depending on conditions such as vibration and impact during transport, separation of each component may occur due to differences in specific gravity of each component constituting the powder adhesive, and temporary fixing performance (especially adhesion) May deteriorate. Therefore, for example, component separation resistance that does not cause separation of components due to vibration, impact, etc. during conveyance is also required.
Compared to solid-type adhesives, powder-type adhesives can cope with the recent downsizing and complexity of various parts. However, as a further performance, various parts have any shape. However, it is required to exhibit excellent temporary fixing performance corresponding to this, and to exhibit work environment properties and component separation resistance as desired.

  The present invention has been made under such circumstances, and exhibits excellent temporary fixing performance and is easily formed into a tablet. Therefore, the adhesive powder and the adhesive tablet capable of exhibiting work environment and component separation resistance are provided. It is an object of the present invention to provide a manufacturing method, an adhesive tablet, and a method for manufacturing a member or a part using the adhesive powder and the tablet.

  As a result of intensive studies to solve the above problems, the present inventor has found that the above problems can be solved by an invention having the following configuration.

1. An adhesive powder containing at least one auxiliary agent (D) selected from a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C), and an inorganic compound and a crosslinkable resin.
2. A step of obtaining an adhesive composition by mixing a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C) and an auxiliary agent (D), and hitting the adhesive composition; A method for producing an adhesive tablet comprising a step of obtaining a tablet by tableting.
3. A step of melt-kneading a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C) and an auxiliary agent (D) to obtain a melt-kneaded product of adhesive powder, and the melt-kneading A method for producing an adhesive tablet comprising a step of solidifying a product to obtain a solidified product.
4). A temporary fixing step of temporarily fixing a member or a component precursor and a processing substrate using the adhesive powder described in 1 above, and a processing step of mechanically processing the precursor to produce a member or a component Manufacturing method of member or component having

  ADVANTAGE OF THE INVENTION According to the present invention, since it exhibits excellent temporary fixing performance and is easy to be a tablet, an adhesive powder capable of exhibiting work environment properties and component separation resistance, an adhesive tablet manufacturing method, an adhesive tablet, and A method for producing a member or a part using the adhesive powder and the tablet can be provided.

  Hereinafter, the manufacturing method of the adhesive powder and adhesive tablet of the present invention will be described. In the present specification, the numerical values of the upper limit and the lower limit relating to the description of the numerical ranges in the above description can be arbitrarily combined, and the numerical values in the examples can be the upper limit and the lower limit. it can.

[Adhesive powder]
The adhesive powder of the present invention comprises at least one auxiliary agent (D) selected from a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C), an inorganic compound and a crosslinkable resin. (Hereinafter, “binder (A)” may also be referred to as “component (A)”, and other plasticizers (B) may also be referred to as “˜component”). Since the adhesive powder of the present invention is a powder, it can exhibit superior temporary fixing performance in response to the recent downsizing and complexity of various parts compared to the solid type. .

In addition, the adhesive powder of the present invention is not limited to the components (A) to (D) for various parts having shapes that do not provide sufficient temporary fixing performance (particularly adhesiveness) in the form of powder. By including the four components, it is possible to correspond as a tablet form. When the adhesive is in the form of a tablet, it is easy to obtain the film thickness of the adhesive, so the size and complexity of various parts has progressed, and it is excellent even for parts with extremely small adhesive surfaces A sufficient amount of adhesive can be brought into contact with the adhesive surface to obtain adhesiveness, and even if the adhesive surface has a complex shape such as an uneven surface, the adhesive is applied to the surface of the concave portion. This is because excellent adhesiveness can be obtained. In addition, since the adhesive powder of the present invention is easy to make into tablets, it can meet the performance requirements for working environment related to scattering etc., and the occurrence of separation of each component depending on conditions such as vibration and impact during transportation As a result, stable temporary fixing performance can be obtained.
In this manner, the adhesive powder of the present invention exhibits excellent temporary fixing performance and is easily formed into a tablet, so that it is possible to exhibit work environment properties and component separation resistance.

(Binder (A))
The adhesive powder of the present invention contains a binder (A). The binder (A) contains at least a shellac resin, and is a component that causes the adhesive powder of the present invention to exhibit temporary fixing performance.
Shellac resin is obtained by purifying a resinous substance secreted by the shellworm by a known solution extraction method, soda method, etc., and the resin content is a resin acid such as alleuritic acid, jarlaric acid, laxialaric acid, etc. And natural shellac resin or synthetic shellac resin mainly composed of an ester compound. Specific examples include purified shellac resin, bleached shellac resin, and decolorized shellac resin. Among the above shellac resins, from the viewpoint of obtaining better temporary fixing performance, the thermosetting time is preferably 90 seconds or more at 170 ° C., more preferably 150 seconds or more, further preferably 200 seconds or more, Although there is no limit, what is about 600 seconds or less is preferable. In the present invention, the thermosetting time is a time measured according to the method for measuring the thermosetting time defined in JIS K5909-1994 for shellac resin, until the sample is heated on a hot plate to become rubbery. Indicates the time.

  The shellac resin contained in the binder (A) is preferably a powder, and the particle diameter thereof is preferably 0.1 μm or more, more preferably 10 μm or more, still more preferably 70 μm or more, and the upper limit is preferably 350 μm. Below, it is more preferably 300 μm or less, still more preferably 250 μm or less. When the shellac resin is a powder having the above particle diameter, it is easy to handle when it is made into a tablet, and it becomes easy to mold. In the present invention, the particle diameter can be measured using a commercially available apparatus such as a laser diffraction particle size distribution measuring apparatus (for example, “SALD-1000 (trade name)” (manufactured by Shimadzu Corporation)). .

In the present invention, as the binder (A), a resin that is soluble in a rosin resin, an organic solvent, or an alkaline solution can be used as a resin other than the shellac resin.
Examples of rosin resins include natural rosin such as gum rosin and wood rosin, rosin ester, hydrogenated rosin, hydrogenated rosin ester, polymerized rosin, polymerized rosin ester, maleic acid modified rosin, maleic acid modified rosin ester, rosin modified phenolic resin and the like. Resin. Examples of the resin soluble in an organic solvent or an alkaline solution include resins having a carboxyl group in the molecule, such as acrylic resin, methacrylic resin, polyester resin, urethane resin, and polycarbonate resin. A copolymer resin with a resin, an epoxy resin or the like is also included. The resin having a carboxyl group in these molecules is preferably a resin having an acid value of 60 mgKOH / g or more, more preferably a resin having an acid value of 80 mgKOH / g or more, and still more preferably a resin having 100 mgKOH / g or more. Here, the organic solvent is not particularly limited as long as it is a known organic solvent, and examples thereof include lower alcohols (monohydric alcohols having 5 or less carbon atoms). Moreover, as an alkaline solution, the alkaline solution using a well-known organic alkali and an inorganic alkali is mentioned.
The softening point of these resins is preferably 70 ° C. or higher, more preferably 80 ° C. or higher, and the upper limit is preferably 180 ° C. or lower, more preferably 160 ° C., from the viewpoint of improving the temporary fixing performance, particularly adhesiveness. It is as follows. In this invention, a softening point is the value measured based on the softening point test method (ring ball method) prescribed | regulated to JISK2207: 2006.

  Further, the particle diameter of the other resin used in combination with the shellac resin may be within the preferable range of the particle diameter of the shellac resin, that is, preferably 0.1 μm or more, more preferably 10 μm or more, and still more preferably. Is 70 μm or more, and the upper limit is preferably 350 μm or less, more preferably 300 μm or less, and still more preferably 250 μm or less.

  In the present invention, the binder (A) may be a shellac resin alone or a combination of a shellac resin and another resin, and may be determined according to desired performance. The content of the shellac resin in the binder (A) is preferably 40% by mass or more, more preferably 60% by mass or more. From the viewpoint of obtaining better temporary fixing performance, particularly adhesiveness, the content of shellac resin in the binder (A) is preferably as large as possible, and the upper limit may be 95% by mass or less, but 100% by mass, That is, the binder (A) is preferably a shellac resin only.

(Plasticizer (B))
The adhesive powder of the present invention contains a plasticizer (B). The plasticizer (B) is a component capable of imparting better temporary fixing performance to the binder (A). The plasticizer (B) is not particularly limited as long as it has properties that impart plasticity. For example, phthalic acid esters, sulfonamides, phosphoric acid esters, benzoic acid esters, higher fatty acids, higher alcohols and the like are preferable. These can be used alone or in combination. Here, carbon number of higher fatty acid becomes like this. Preferably it is 12 or more, More preferably, it is 14 or more, More preferably, it is 16 or more. The carbon number of the higher alcohol is preferably 12 or more, more preferably 14 or more, and still more preferably 16 or more.

  More specific examples of the plasticizer (B) include phthalic acid esters such as dicyclohexyl phthalate, diethylhexyl phthalate, dihydroabiethyl phthalate, and dimethyl isophthalate. Examples of the sulfonamide include toluene sulfone. Examples include amide, ethyltoluenesulfonamide, cyclohexyltoluenesulfonamide, etc., phosphate esters include triphenyl phosphate, tricresyl phosphate, etc., and benzoate esters include sucrose benzoate, ethylene glycol dibenzoate. , Tribenzoyl glyceride, pentaerythritol tetrabenzoate, trimethylolpropane tribenzoate, etc., and higher fatty acids include myristic acid, palmitic acid, stearic acid, behenic acid, etc. The Le, stearyl alcohol, behenyl alcohol and the like. Among these, solid plasticizers such as dicyclohexyl phthalate and triphenyl phosphate are preferred.

  The plasticizer (B) is preferably a powder made of the above material, and the particle size is preferably a range of the above-mentioned shellac resin particle size (that is, a preferable range of the particle size of the binder (A)). More specifically, it is preferably 0.1 μm or more, more preferably 10 μm or more, further preferably 70 μm or more, and the upper limit is preferably 350 μm or less, more preferably 300 μm or less, and further preferably 250 μm or less.

  The content of the plasticizer (B) is preferably 5 parts by mass, more preferably 8 parts by mass or more, still more preferably 10 parts by mass or more, and particularly preferably 15 parts by mass with respect to 100 parts by mass of the binder (A). The upper limit is preferably 100 parts by mass or less, more preferably 60 parts by mass or less, still more preferably 40 parts by mass or less, and particularly preferably 25 parts by mass or less. When the content of the plasticizer (B) is within the above range, it is possible to impart better temporary fixing performance to the binder (A).

(Lubricant (C))
The adhesive powder of the present invention contains a lubricant (C). Normally, capping in which the upper side of the tablet is peeled off when the powder is removed after tableting, and the adhesive composition adheres to the upper side at the time of tableting. May stick to the surface of the tablet. In the present invention, by using the lubricant (C), when the adhesive powder is used as a tablet, it is possible to obtain the performance of suppressing the occurrence of capping and sticking (hereinafter referred to as “tablet performance”). In some cases, tablets using the adhesive powder can be more efficiently produced, so that tablet production efficiency can be improved.

  As the lubricant (C), those generally used as a lubricant during tablet production can be used without particular limitation. For example, natural lubricants such as talc, hardened rapeseed oil, beeswax and the like, and fatty acid metal salts , Polyalkylene glycol, polyglycerin fatty acid ester, sucrose fatty acid ester, etc., among which fatty acid metal salt, polyalkylene glycol, polyglycerin fatty acid ester are preferred, fatty acid metal salt, polyalkylene glycol are more preferred, especially fatty acid metal salt Is preferred. In this invention, as a lubricant (C), the said lubricant can be used individually or in combination of multiple types.

  The aliphatic metal salt preferably has a carbon number of 8 or more, more preferably 12 or more, still more preferably 16 or more, and the upper limit is preferably 28 or less, more preferably 24 or less, still more preferably 20 or less. Preferred examples include fatty acid metal salts composed of unsaturated fatty acids and metals such as magnesium, calcium, zinc, aluminum, barium, lithium, strontium, lead, sodium and potassium. Among the above metals, magnesium, calcium, zinc, aluminum, barium, and lithium are preferable in consideration of the effect as a lubricant, availability, and the like.

  Specific examples of the aliphatic metal salt preferably used as the lubricant (C) in the present invention include caprylic acid such as magnesium caprylate, calcium caprylate, zinc caprylate, aluminum caprylate, barium caprylate and lithium caprylate. Metal salts: Magnesium laurate, calcium laurate, zinc laurate, aluminum laurate, barium laurate, lithium laurate, etc .; Magnesium myristate, calcium myristate, zinc myristate, aluminum myristate, myristic acid Metal salts of myristic acid such as barium and lithium myristate; such as magnesium palmitate, calcium palmitate, zinc palmitate, aluminum palmitate, barium palmitate, lithium palmitate, etc. Luminate metal salt; metal stearate such as magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate, lithium stearate; magnesium oleate, calcium oleate, zinc oleate, aluminum oleate, Metal oleate such as barium oleate and lithium oleate; metal behenate such as magnesium behenate, calcium behenate, zinc behenate, aluminum behenate, barium behenate, lithium behenate; magnesium montanate, montanic acid Examples include metal salts of montanic acid such as calcium, zinc montanate, aluminum montanate, barium montanate, and lithium montanate. These may be used alone or in combination. It can be. Among these, metal stearate salts such as magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate, lithium stearate and the like are preferable from the viewpoint of obtaining a more excellent effect of the lubricant.

Examples of the polyalkylene glycol include polyethylene glycol, polypropylene glycol, random polymers and block polymers thereof, and the mass average molecular weight is preferably 1,500 or more, more preferably 2,000 or more, and still more preferably 5. The upper limit is preferably 100,000 or less, more preferably 50,000 or less, and still more preferably 25,000 or less. In this specification, “mass average molecular weight” refers to a molecular weight in terms of polystyrene determined by gel permeation chromatography (GPC) measurement.
The polyglycerol fatty acid ester is preferably a polyglycerol ester of a saturated or unsaturated fatty acid having 12 to 18 carbon atoms, such as polyglycerol laurate, polyglycerol myristate, polyglycerol palmitate, polyglycerol stearate, Polyglycerol oleate, polyglycerol linoleate, and the like can be used.

  The lubricant (C) is preferably a powder made of the above material, and the particle size is preferably a preferred range of the particle size of the shellac resin (that is, a preferred range of the particle size of the binder (A)). In other words, it is preferably 0.1 μm or more, more preferably 10 μm or more, still more preferably 70 μm or more, and the upper limit is preferably 350 μm or less, more preferably 300 μm or less, and even more preferably 250 μm or less. .

  The content of the lubricant (C) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1.0% by mass or more, based on the total amount of the composition. Preferably it is 5 mass% or less, More preferably, it is 4.0 mass% or less, More preferably, it is 3.5 mass% or less. When the content of the lubricant (C) is within the above range, the tableting performance is improved, and the production efficiency of tablets using the adhesive powder is improved.

(Auxiliary agent (D))
The adhesive powder of the present invention contains at least one selected from an inorganic compound and a crosslinkable resin as an auxiliary agent (D). With the aid (D), the effect of improving the adhesiveness by forming a uniform film thickness of the adhesive powder, the effect of improving the strength of the tablet when made into tablets, and various mechanical processing such as cutting and polishing The effect which suppresses adhesion of the adhesive powder to industrial cutters, such as a diamond cutter used for, is acquired.

  Examples of the inorganic compound employed as the auxiliary agent (D) include inorganic carbonates such as calcium carbonate and magnesium carbonate; inorganic sulfates such as barium sulfate, magnesium sulfate and calcium sulfate; aluminum oxide (alumina) and silicon oxide (silica). In addition, inorganic oxides such as titanium oxide (titania), magnesium oxide, and zinc oxide, and other aluminum silicates, aluminum hydroxides, and the like can be given, and these powders are preferable. Among the above-mentioned inorganic compounds, inorganic sulfates and inorganic oxides are preferable, among which barium sulfate and silicon oxide (silica) are preferable, and barium sulfate and silicon oxide (silica) are more preferably used in combination. Moreover, in this invention, the said inorganic compound can be used individually or in combination of multiple types as auxiliary agent (D).

  Preferred examples of the crosslinkable resin employed as the auxiliary agent (D) include a crosslinked acrylic resin, a crosslinked phenolic resin, a crosslinked epoxy resin, a crosslinked urea resin, and a crosslinked melamine resin, and these powders are preferable. In the present invention, the above-mentioned crosslinkable resin can be used alone or in combination as an auxiliary agent (D), and the above inorganic compound and crosslinkable resin can also be used in combination.

  The auxiliary agent (D) is preferably a powder made of the above-mentioned material, and the particle size thereof is from the preferable range of the particle size of the shellac resin (that is, the preferable range of the particle size of the binder (A)). What is necessary is just to select, ie, Preferably it is 0.1 micrometer or more, More preferably, it is 1 micrometer or more, Preferably it is 100 micrometers or less as an upper limit, More preferably, it is 50 micrometers or less.

  The content of the auxiliary agent (D) is preferably 30 parts by mass, more preferably 60 parts by mass or more, still more preferably 90 parts by mass or more, particularly preferably 100 parts by mass with respect to 100 parts by mass of the binder (A). The upper limit is preferably 200 parts by mass or less, more preferably 160 parts by mass or less, still more preferably 145 parts by mass or less, and particularly preferably 135 parts by mass or less. When the content of the auxiliary agent (D) is within the above range, the effect of improving the temporary fixing performance by the binder (A), the effect of forming a uniform film thickness by the auxiliary agent (D), and the adhesion of the adhesive powder In a well-balanced manner, and better temporary fixing performance can be obtained.

  Further, among the above inorganic compounds, when silicon oxide (silica) is used, when the adhesive powder of the present invention is tableted to form a tablet, the fluidity of the adhesive powder (hereinafter including fluidity). In other words, the tableting performance is improved, and the tablet production efficiency is improved and the hardness of the tablet is increased. When silicon oxide (silica) is used as the auxiliary agent (D), the content of silicon oxide (silica) is based on 100 parts by mass of the binder (A) from the viewpoint of improving the fluidity of the adhesive composition. The upper limit is preferably 5 parts by mass or less, more preferably 4.5 parts by mass or less, preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, still more preferably 1.0 parts by mass or more. More preferably, it is 4.0 parts by mass or less. In the present invention, silicon oxide (silica) can be used alone as the auxiliary (D), and in this case, it may be used within the range described as the content of the auxiliary (D). Further, when barium sulfate and silicon oxide (silica), which are particularly preferable as the auxiliary agent (D), are used in combination, silicon oxide (silica) is used within the range described as the content of the silicon oxide (silica), and barium sulfate and What is necessary is just to use so that the total amount with a silicon oxide (silica) may become in the range described as content of the said adjuvant (D).

(Method for producing adhesive powder)
The adhesive powder of the present invention can be produced by mixing a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C) and an auxiliary agent (D). These components may be mixed using a known powder mixer, and it is preferable to mix them sufficiently until they are uniformly dispersed.
There is no limitation on the order of charging the binder (A), plasticizer (B), auxiliary agent (C) and lubricant (D) into the powder mixer, and all the components may be charged simultaneously. After adding the binder (A), the plasticizer (B), the auxiliary agent (C) and the lubricant (D) may be added in order or simultaneously and mixed.

  Moreover, in order to make the particle size of each said component or adhesive powder uniform before or after the above mixing, sieving may be performed using a sieve or the like. By sieving, a more uniform adhesive powder without uneven distribution of each component is obtained, so that the temporary fixing performance is improved. For example, when obtaining an adhesive composition powder having an average particle diameter of 0.1 μm or more and 350 μm or less, sieving is performed using a sieve having a mesh corresponding to an upper limit (350 μm) particle diameter. Good. In addition, what is necessary is just to use the metal woven net etc. based on JISZ8801-1: 2006 as a sieve.

(tablet)
As described above, the adhesive powder of the present invention is bonded when the temporary fixing performance (particularly adhesiveness) cannot be obtained in the form of powder, or when more severe working environment and long-term storage stability are required. It can be used as a tablet formed of a conductive powder. In the present invention, the “tablet formed of an adhesive powder” is a solid product having a certain shape formed using an adhesive powder, and is used in a normal manner (as an adhesive). In addition to use, storage and transportation are included.) This means that the certain shape can be maintained. Here, “can hold a certain shape” means that even if a defect occurs in a part thereof, it is 3% or less with respect to the total surface area of the tablet and about 5% or less with respect to the depth direction of the tablet. Strictly speaking, it may include an aspect that cannot be said to “can maintain a certain shape”, such as a slight defect.

  In the present invention, as the mechanical strength when the adhesive powder is a tablet, the crushing strength is preferably 3N (0.3 kgf) or more. By having such a crushing strength, the adhesive powder can easily form tablets, the generation of dust during handling is reduced, and a better working environment can be obtained. In addition, powder generated by contact between tablets due to vibration, impact, etc. during conveyance can be reduced, so that shape stability (also referred to as dust resistance) as well as component separation resistance can be reduced. As a result, stable temporary fixing performance can be obtained. From the same viewpoint, the crushing strength of the tablet when the adhesive powder of the present invention is used as a tablet is more preferably 10 N (1.0 kgf) or more, further preferably 15 N (1.5 kgf) or more, particularly preferably. Is 20 N (2.0 kgf) or more. The upper limit of the crushing strength is not particularly limited, but is about 100 N (10.2 kgf) or less in consideration of ease of manufacture and use. In the present specification, the crushing strength is an average value of crushing strength measured by the following method for any 10 tablets. More specifically, as a method for measuring the crushing strength, a hardness tester is used, and 10 tablets as test pieces are arbitrarily selected in an atmosphere of normal temperature and normal pressure, and a pressure plate is used at a constant speed for these test pieces. When a compressive load is applied by pressing, the maximum load that can be withstood by the test piece is measured, and this is taken as the crushing strength.

  The shape of the tablet can be appropriately selected in consideration of the shape of various parts and the like. For example, a shape that can be exhibited by a pharmaceutical tablet can be employed. More specifically, a cylinder, an elliptical cylinder, a rectangular parallelepiped, a cube, a triangular prism, a lens shape, or a combination of these shapes, for example, a combination of a dome shape obtained by cutting the lens shape horizontally on the upper and lower horizontal surfaces of a cylindrical plate ( And a dome shape on the upper and lower surfaces of the cylindrical plate). Also, shapes other than the cylinder may be adopted in which the vertical horizontal plane is a dome shape.

As for the size of the tablet, the aspect ratio is preferably 1.0 or more and 6.0 or less. When the aspect ratio is within the above range, it is easy to obtain physical quality such as superior crushing strength, to obtain better work environment, and to handle and use more easily. Further, it is possible to reduce powder generated due to abrasion, chipping or the like due to contact between tablets due to vibration, impact, etc. during conveyance, and stable temporary fixing performance can be obtained.
From the same viewpoint, the aspect ratio is more preferably 1.1 or more, still more preferably 1.4 or more, particularly preferably 1.7 or more, and the upper limit is more preferably 4.0 or less, still more preferably. Is 3.0 or less, particularly preferably 2.5 or less. In the present invention, the aspect ratio is the ratio between the major axis and the minor axis of the tablet. More specifically, the length of the horizontal sectional shape of the tablet is the major axis, and the height of the vertical sectional shape of the tablet (tablet It is calculated as the ratio of the major axis to the minor axis when the (thickness) is the minor axis. Here, the length of the horizontal cross-sectional shape means that if the cross-sectional shape is a circle, the diameter thereof, if it is an ellipse, the long side thereof, and the other shape is the diameter of the circumscribed circle of the shape.

  Moreover, as a magnitude | size of a tablet, it is preferable that the length of a horizontal cross-sectional shape is 2 mm or more and 25 mm or less. When the length of the horizontal cross-sectional shape is within the above range, it is easy to obtain better physical quality such as crushing strength, better working environment and long-term storage stability, and more easy handling and use. It becomes easy. From the same viewpoint, the length of the horizontal cross-sectional shape is more preferably 2.5 mm or more, further preferably 3 mm or more, particularly preferably 4 mm or more, and the upper limit is more preferably 20 mm or less, still more preferably 15 mm or less. Particularly preferably, it is 10 mm or less.

  The weight per tablet may be appropriately adjusted as desired, and is not particularly limited, but is preferably 10 mg or more, more preferably 30 mg or more, still more preferably 50 mg or more, and particularly preferably 100 mg or more. The upper limit is preferably 4000 mg or less, more preferably 1000 mg or less, still more preferably 500 mg or less, and particularly preferably 300 mg or less. When the weight per tablet is within the above range, handling and use become easier.

  When the adhesive powder of the present invention is used in the form of a tablet, it is preferably, for example, an aggregate of the adhesive powder or a melt-kneaded product of the adhesive powder. The adhesive powder aggregate tablet can be produced, for example, by agglomerating the adhesive powder by compression molding or the like, and more specifically, tableting the adhesive powder. Can be manufactured. Moreover, the tablet of the said melt-kneaded material of adhesive powder can be manufactured by melt-kneading and solidifying adhesive powder (or (A) component-(D) component). The method for producing these tablets will be described later as a method for producing adhesive tablets.

(Application of adhesive powder)
Since the adhesive powder of the present invention exhibits excellent temporary fixing performance and easily forms tablets, it can exhibit work environment and component separation resistance. Therefore, the adhesive powder of the present invention is used in applications requiring temporary fixing performance as an adhesive, for example, various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, Members or parts used in various equipment such as automobile equipment, for example, wafers such as silicon wafers, various mechanical processes such as cutting, polishing, grinding, cutting of optical lenses, etc., magnetic materials such as magnets, sapphire, It is suitably used for primary fixing (temporary fixing) in mechanical processing of various members or parts formed of gallium arsenide, crystal, metal, glass, resin, or the like.
As described above, the adhesive powder of the present invention can also be used as a tablet. The form of the adhesive powder and the adhesive tablet may be appropriately selected in consideration of the working environment, various members to be temporarily fixed, the shape of the part, the size of the adhesion area, the work accuracy, and the like.

As a typical example of the method of using the adhesive powder of the present invention, a method of using the magnetic material for cutting will be described.
First, an adhesive powder is spread on a surface plate, or tablets using a predetermined number of adhesive powders are placed on the surface plate, and the surface plate is usually 60 ° C. or higher, preferably 70 ° C. or higher, and the upper limit is usually 180 ° C. ℃ or less, preferably 160 ℃ or less, more preferably 150 ℃ or less, the adhesive powder or tablet is softened or melted, and the magnetic body and the surface plate are heat-pressed, and the magnetic body is placed on the surface plate. To fix. In addition, hot air may be supplied simultaneously with heating the surface plate, and the adhesive powder or tablet may be placed on the surface plate after the surface plate is heated.
Next, the magnetic body is cut by a cutting machine. What is necessary is just to peel a magnetic body from the surface plate of a cutting machine using alkaline solution after completion | finish of a cutting process.

  The adhesive powder of the present invention exhibits an adhesive property that the magnetic material does not peel off from the surface plate during the cutting process, and after the cutting process is finished, the magnetic material can be easily removed from the surface plate using an alkaline solution or the like. It has peelability that can be peeled. In addition, the adhesive powder of the present invention does not need to be hand-painted or used as a hot melt applicator when forming a film, and is excellent in work efficiency. Then, since the adhesive film can be formed simply by placing it on the surface plate, the working efficiency superior to that of the powder can be obtained. Furthermore, in the form of tablets, it is easy to form an adhesive film as well as a solid type as well as a solid type. Future demands such as fully automatic operation in mechanical processing of various parts It is possible to cope with the above more easily.

[Method for producing adhesive tablet]
In the method for producing an adhesive tablet of the present invention, a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C), and an auxiliary agent (D) are mixed to produce an adhesive powder. And a step of tableting the adhesive powder to obtain a tablet. The binder (A), plasticizer (B), lubricant (C) and auxiliary agent (D) containing at least a shellac resin used in the tablet production method of the present invention are added to the adhesive powder of the present invention. The same as those described as the components that can be included.

(mixture)
The mixing of the binder (A) containing at least a shellac resin, the plasticizer (B), the lubricant (C) and the auxiliary agent (D) is a known powder as described above as a method for producing an adhesive powder. What is necessary is just to perform using a mixer, and it is preferable to mix thoroughly until it disperse | distributes uniformly. The order of charging the binder (A), plasticizer (B), auxiliary agent (C) and lubricant (D) into the powder mixer, sieving using a sieve, etc. is also described above. It is as follows.

(Tablet)
The adhesive powder obtained by the above mixing is tableted to obtain a tablet using the adhesive powder. For tableting, a device having a mechanism capable of filling an adhesive powder into a fixed mold, etc., compressing, and releasing, such as a single-shot tableting machine, a multi-stage tableting machine (for example, a two-stage compression tableting) Machine), a rotary tableting machine, and a multi-stage and rotary tableting machine may be used.
The tablet obtained by the above mixing and tableting corresponds to the aggregate of the adhesive powder.

Further, the tablet production method of the present invention comprises a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C), and an auxiliary agent (D) by melt-kneading the adhesive powder. A step of obtaining a melt-kneaded product and a step of solidifying the melt-kneaded product to obtain a solidified product.
In the melt kneading of the components (A) to (D), the components (A) to (D) may be mixed in advance to form an adhesive powder, and then melt kneaded. Component to component (D) may be melt-kneaded. For example, the melt kneading is preferably 90 ° C. or higher, more preferably 100 ° C. or higher, and the upper limit is preferably 160 ° C. or lower, more preferably 150 ° C. or lower, still more preferably 140 ° C. or lower, preferably 3 minutes. Above, more preferably 5 minutes or more, the upper limit is preferably 1 hour or less, more preferably 30 minutes or less, the adhesive powder or (A) component ~ (D) component, batch type kneader, kneading function The other components are fed while melting components (mainly binder (A)) that can be supplied to a kneading machine such as a single screw extruder, twin screw extruder, three rolls, etc. It can be carried out by kneading and kneading.

Solidification of the melt-kneaded product of the adhesive powder containing the components (A) to (D) obtained by the melt-kneading is performed by, for example, pouring the melt-kneaded product into a mold corresponding to a desired tablet shape. Then, it is cooled to room temperature and solidified to obtain a solidified product, and it may be used as a tablet as it is, or it is not a shape corresponding to the shape of the desired tablet, for example, the molten kneaded product is poured into a rectangular parallelepiped mold, The solidified product may be obtained by cooling to room temperature to obtain a solidified product, and the resulting solidified product may be punched out into a desired tablet shape.
The tablet obtained by the mixing, melt-kneading, and solidification corresponds to the melt-kneaded product of the adhesive powder.

[Adhesive tablets]
The adhesive tablet of the present invention is formed by the above-mentioned adhesive powder of the present invention. For example, it can be produced by the above-described method for producing an adhesive tablet of the present invention. Various properties of the adhesive tablet of the present invention are the same as those of the tablet formed of the adhesive powder described as one of the usage forms of the adhesive powder of the present invention.

[Manufacturing method of member or part]
The member or component manufacturing method of the present invention includes a temporary fixing step of temporarily fixing a member or component precursor and a processing substrate using the above-described adhesive powder or adhesive tablet of the present invention. It has the processing process which gives a member or a part by giving mechanical processing, It is characterized by the above-mentioned.

The temporary fixing step is a step of temporarily fixing a precursor of a member or component and a processing substrate using the adhesive powder or adhesive tablet of the present invention, more specifically, the precursor and the processing substrate. In the process, a coating film using the adhesive powder of the present invention is formed between the precursor and the processing substrate. As a method for forming a coating film, an adhesive powder is dispersed on a processing substrate such as a surface plate, or an adhesive tablet is arranged, and the processing substrate is usually 60 ° C. or higher, preferably 70 ° C. or higher, upper limit. And a method of forming a coating film by heating the adhesive powder to a softened or molten state by heating to 180 ° C. or lower, preferably 160 ° C. or lower, more preferably 150 ° C. or lower. After forming the coating film, by placing the precursor on the coating film, the precursor can be temporarily fixed to the processing substrate via the coating film. The precursor may be roughened with a polishing agent or the like before being temporarily fixed to the processing substrate, and surface treatment may be performed by chemical etching as necessary.
Hot air may be supplied simultaneously with heating the processing substrate, and the adhesive powder may be placed on the surface plate after the surface plate is heated.

  The processing step is a step of processing the processed surface of the precursor temporarily fixed to the processing substrate in the temporary fixing step. Examples of the processing in the production method of the present invention include various mechanical processing such as cutting, polishing, cutting, grinding, drilling and the like, and may be processing alone or a combination of these processing.

  The processing in the processing step of the manufacturing method of the present invention is roughly classified into general processing that does not require special precision and precision processing that requires high precision. For example, mechanical processing of a wafer such as a silicon wafer, an optical lens, and a semiconductor device member, for example, polishing of the surface of a wafer such as a silicon wafer, requires processing by precision processing. In the production method of the present invention, since the tablet of the present invention having excellent temporary fixing performance is used, it can be temporarily fixed to the processing substrate without inclining the precursor, and the coating film of the adhesive can be used. The in-plane film thickness difference is small, and the non-contact area is very small. For this reason, in the processing step, the pressure applied to the precursor from the jig for mechanical processing can be made substantially uniform with respect to the surface to be processed of the precursor. As a result, since the precursor can be processed with high accuracy, a high-quality member or component can be manufactured.

  The manufacturing method of the member or component of this invention may have the peeling process which peels the member or component in which the mechanical processing was given after the said process process from the board | substrate for a process. For peeling, for example, the member or component may be peeled from the processing substrate using an alkaline solution or the like, using a razor, a scraper, or the like, or by heating and melting.

  Examples of members and parts obtained by the member or part manufacturing method of the present invention include various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, automotive equipment, and the like. Members or parts used in various devices, such as wafers such as silicon wafers, optical lenses, etc., various members formed of magnetic materials such as magnets, sapphire, gallium arsenide, crystal, metal, glass, resin, etc. Parts.

  EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.

(Evaluation and measurement method)
(1) Adhesive evaluation About the adhesive powder and tablet obtained in each Example and Comparative Example, the tablet was powdered, or the adhesive powder was spread evenly on one stainless steel substrate. After being heated and melted at 120 to 130 ° C., it was bonded to the other stainless steel substrate, cooled to room temperature, and then the shearing force of the bonded substrate was measured according to “Tensile shear bond strength test method” defined in JIS K6850: 1999. ”Using a tensile strength measuring instrument, and evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: The shearing force was 5 MPa or more.
B: The shearing force was 1 MPa or more and less than 5 MPa.
C: Shear force was less than 1 MPa.
(2) Evaluation of Uniform Dispersibility Ease of the adhesive powder obtained in each Example and Comparative Example was applied to a stainless steel substrate (30 cm × 30 cm) and evaluated according to the following criteria. In this example, if it was A evaluation, it was considered as acceptable.
A: It was possible to spray evenly easily.
C: It was difficult to spray uniformly, or it took time to spray uniformly.
(3) Evaluation of component separation resistance 100 tablets arbitrarily selected from the examples and comparative examples, 10 g of powder was placed in a 30 ml glass bottle, and lightly struck 100 times from the side to give vibration. The separated state of the adhesive composition was evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: The form of the adhesive composition before vibration was maintained, and no separation occurred.
B: Although there was some change in the form of the adhesive composition, no separation occurred.
C: Separation of the components of the adhesive composition occurred.
(4) Evaluation of work environment property The following criteria evaluated the generation | occurrence | production and scattering of the dust etc. at the time of mounting the adhesive powder and tablet obtained by each Example and the comparative example on a stainless steel board | substrate. In this example, it was determined to be acceptable if it was B or higher.
A: Dust was not generated at all.
B: Dust was hardly generated and the working environment was not deteriorated.
C: Dust was generated and the working environment was significantly deteriorated.
(5) Measurement of crushing strength Ten tablets obtained in each example and comparative example were arbitrarily selected, and a universal compression tester (“AG-10TBR (trade name)”, manufactured by Shimadzu Corporation) was used. The compression pressure was applied to the tablets from the height direction to measure the compression pressure when the tablets were broken, and the average value of the crushing strength measured for 10 tablets was taken as the crushing strength of the tablets. .
(6) Evaluation of dust resistance About the occurrence of powdering when 30 tablets selected in each example and comparative example are arbitrarily selected, placed in a 30 ml glass bottle and shaken 30 times to the left and right, Evaluated by criteria. In this example, it was determined to be acceptable if it was B or higher.
A: Powdering did not occur.
B: Although pulverization occurred a little, the tablet did not crack.
C: Tablet cracking and / or many powdering occurred.
(7) Tableting performance 1 (Evaluation of fluidity of adhesive powder)
The fluidity when the adhesive powders obtained in each Example and Comparative Example were poured into a mold of a tableting machine was evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: It was possible to pour into the mold without any delay.
B: Although there was a slight delay, there was no practical problem.
C: It was difficult to pour into the mold.
(8) Tableting performance 2 (capping evaluation)
About the occurrence situation of capping of tablets when the adhesive composition obtained in each Example is tableted with a tableting machine (problem that the upper side of the tablet peels off when demolding after tableting) Evaluation based on the criteria. In this example, it was determined to be acceptable if it was B or higher.
A: Capping occurred when less than 3 pieces out of 100 pieces.
B: Capping occurred at 3 to less than 10 out of 100.
C: Capping occurred at 10 or more out of 100.
(9) Tableting performance 3 (Evaluation of sticking)
Sticking of the tablet when the adhesive composition obtained in each example was tableted with a tableting machine (the adhesive composition was adhered to the upper punch during tableting, and it was Occurrence of a defect in which a part of the tablet adheres and the surface of the tablet is damaged was evaluated according to the following criteria. In this example, it was determined to be acceptable if it was B or higher.
A: Sticking occurred in less than 3 out of 100.
B: Sticking occurred at 3 to less than 10 out of 100.
C: Sticking occurred in 10 or more of 100 pieces.

Examples 1-4, Comparative Examples 1-3
Each component was mixed in the blending amount (% by mass) shown in Table 1 to prepare an adhesive powder. About the obtained adhesive powder, temporary fix | stop performance, uniform spraying ease, component separation resistance, and work environment property were evaluated by the method of said (1)-(4). The evaluation results are shown in Table 1.
Moreover, about these adhesive powder, the tablet using this adhesive composition which has a magnitude | size (a diameter, thickness, and mass) shown in Table 1 using the tableting machine was produced. The shape of the tablet was a shape obtained by combining a dome shape obtained by cutting the lens shape in the horizontal direction on the upper and lower horizontal surfaces of the cylindrical plate (the upper and lower surfaces of the cylindrical plate were formed into a dome shape). About the obtained tablet, by the method of said (1)-(4), (6)-(9), temporary fix | stop performance, component-separation resistance, work environment property, long-term storage stability, powdering resistance, and impact The tablet performance was evaluated, and the crushing strength was measured by the method (5) above. The evaluation results and measurement results are shown in Table 1.

* 1, Content based on 100 parts by mass of binder (A).
I) Details of each component shown in Table 1 used in this example are as follows.
Binder (A): shellac resin powder (thermosetting time (170 ° C.): 200 seconds)
・ Plasticizer (B): Dicyclohexyl phthalate
Lubricant 1 (C): Magnesium stearate Lubricant 2 (C): Polyethylene glycol Auxiliary agent 1 (D): Barium sulfate powder (0.1-200 μm, average particle size: 15 μm)
Auxiliary agent 2 (D): silica powder (particle size: 0.1 to 10 μm, average particle size: 4 μm)

  From the results of the examples, the adhesive powder of the present invention has excellent adhesiveness, and both can be easily peeled off, so that the temporary fixing performance has both excellent adhesiveness and peelability. It turns out that it is what has. In addition, in the case of powder, although it does not have sufficient performance in terms of component separation resistance and work environment, the use of tablets improves excellent component separation resistance, work environment and powder resistance. Confirmed to do. In addition, the tableting performance is excellent, and the adhesive powder of the present invention is suitable for making a tablet form. Even if the environmental properties are not sufficient, it is possible to obtain excellent temporary fixing performance, component separation resistance, work environment and powder resistance by using tablets, so that stable temporary fixing performance can be obtained. It was confirmed that it was obtained. Also, as shown in Table 1, the adhesive powder is difficult to spread evenly, and as a result, there may be unevenness in the adhesive coating film. It can be said that the adhesive tablet is superior in this respect because it can form a uniform adhesive coating more easily by arranging.

On the other hand, since the adhesive powder of Comparative Example 1 does not contain the plasticizer (B), it does not have sufficient adhesiveness and does not have excellent temporary fixing performance. Immediately after that, it was in the form of a tablet. However, since the tablet was broken due to shaking or the like and changed in shape due to powdering, it could not be said that the characteristics as a tablet were retained. Therefore, it cannot be said that the working environment is excellent, most of them do not remain in the form of tablets, and cannot be said to have excellent powder resistance. Therefore, the crushing strength was not measured.
Since the adhesive powder of Comparative Example 2 does not contain the auxiliary agent (C), the adhesiveness is not sufficient and it does not have excellent temporary fixing performance. The work efficiency at the time of tableting became extremely poor. Therefore, the crushing strength was not measured. In addition, the adhesive powder of Comparative Example 3 that does not contain the lubricant (D) has good temporary fixing performance, but has poor tableting performance and is suitable for use as a tablet form. It couldn't be said.

  The adhesive powder of the present invention has excellent temporary fixing performance, is easy to be used as a tablet, and can exhibit work environment and component separation resistance. , For example, various electronic devices such as OA equipment, information equipment, home appliances, optical equipment such as optical lenses, medical equipment, parts or parts used in various equipment such as automobile equipment, for example, wafers such as silicon wafers Various mechanical processing such as cutting, polishing, grinding, cutting, etc. of optical lenses, etc., and various members or parts made of magnetic materials such as magnets, sapphire, gallium arsenide, crystal, metal, glass, resin, etc. It is preferably used for primary fixing (temporary fixing) during mechanical processing.

Claims (18)

  An adhesive powder containing at least one auxiliary agent (D) selected from a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C), and an inorganic compound and a crosslinkable resin.   The adhesive powder according to claim 1, wherein the binder (A) contains a rosin resin and a resin having a carboxyl group in the molecule.   The adhesive powder according to claim 1 or 2, wherein the content of the shellac resin contained in the binder (A) is 40% by mass or more and 100% by mass or less.   The plasticizer (B) is at least one selected from phthalic acid esters, sulfonic acid amides, phosphoric acid esters, benzoic acid esters, higher fatty acids having 12 or more carbon atoms, and higher alcohols having 12 or more carbon atoms. 4. The adhesive powder according to any one of 3 above.   The adhesive powder according to claim 1, wherein the lubricant (C) is at least one selected from fatty acid metal salts and polyalkylene glycols.   The adhesive powder according to claim 5, wherein the fatty acid metal salt is at least one selected from magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate and lithium stearate.   The adhesive powder according to any one of claims 1 to 6, wherein the auxiliary (D) is at least one inorganic powder selected from inorganic carbonates, inorganic sulfates, and inorganic oxides.   The adhesive powder according to any one of claims 1 to 7, wherein the auxiliary agent (D) is a barium sulfate powder and a silica powder.   The said auxiliary agent (D) is at least 1 type chosen from crosslinked acrylic resin powder, crosslinked phenol resin powder, crosslinked epoxy resin powder, crosslinked urea resin powder, and crosslinked melamine resin powder. The adhesive powder according to any one of the above.   The adhesive powder according to any one of claims 1 to 9, wherein a softening point measured in accordance with a softening point test method defined in JIS K2207: 2006 is 60 ° C or higher and 120 ° C or lower.   The adhesive powder according to any one of claims 1 to 10, wherein a content of the plasticizer (B) with respect to 100 parts by mass of the binder (A) is 5 parts by mass or more and 100 parts by mass or less.   The adhesive powder according to any one of claims 1 to 11, wherein the content of the auxiliary (D) with respect to 100 parts by mass of the binder (A) is 30 parts by mass or more and 200 parts by mass or less.   The adhesive powder according to any one of claims 1 to 12, wherein a content of the lubricant (C) based on the total composition is 0.1% by mass or more and 5% by mass or less.   The adhesive powder according to any one of claims 1 to 13, which is used for producing an adhesive tablet.   A step of obtaining an adhesive composition by mixing a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C) and an auxiliary agent (D), and hitting the adhesive composition; A method for producing an adhesive tablet comprising a step of obtaining a tablet by tableting.   A step of melt-kneading a binder (A) containing at least a shellac resin, a plasticizer (B), a lubricant (C) and an auxiliary agent (D) to obtain a melt-kneaded product of adhesive powder, and the melt-kneading A method for producing an adhesive tablet comprising a step of solidifying a product to obtain a solidified product.   The adhesive tablet formed with the adhesive powder of any one of Claims 1-14.   A temporary fixing step of temporarily fixing a precursor of a member or a part and a processing substrate using the adhesive powder according to any one of claims 1 to 14 or the adhesive tablet according to claim 17, A method for manufacturing a member or a component, which includes a processing step of producing a member or a component by subjecting a precursor to mechanical processing.