JP3137903B2 - Button molding material and button manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button molding material for molding buttons such as cuff buttons and decorative buttons to be attached to clothes and the like, and to a method of manufacturing buttons . More specifically, the molding material for a suitable button for extruding a button having a stem pattern and the
The present invention relates to a method for manufacturing a button using a molding material for a button .

[0002]

2. Description of the Related Art Conventionally, as a button molding material for molding a button attached to clothes or the like, for example,
Urea resins are used.

[0003] However, urea resin is a thermosetting resin that is cured by condensation polymerization, and thus generates water during curing. For this reason, when a thick button is molded by curing the urea resin, there is a disadvantage that the button is cracked. The urea resin, even in the cured urea resin after curing, is undergoing condensation polymerization, albeit slowly. For this reason, a button made of a cured urea resin has a large physical property defect that distortion due to shrinkage gradually occurs due to aging and cracks occur on the surface.

Further, since urea resins are generally used by being mixed with pulp for the purpose of preventing cracks, the resulting buttons have poor transparency and are inferior in design, which is disadvantageous in terms of design value. are doing. In addition, since the cured urea resin is hard and brittle, it cannot be cut.

In order to solve these problems, unsaturated polyester resins have been used as molding materials for buttons.

[0006] The unsaturated polyester resin is a liquid thermosetting resin usually containing 20 to 50% by weight of styrene as a monomer, and is cured without producing by-products by addition polymerization. Therefore, the physical properties of the cured product are excellent in stability over time, and cutting is easy, so that it is very suitable for use as a molding material for buttons. Vinyl ester resins are also very suitable for use as button molding materials that exhibit properties similar to those of unsaturated polyester resins.

[0007] These unsaturated polyester resins and vinyl ester resins are generally formed into buttons by centrifugal molding or rod tube molding, which is a type of casting.

In the case of centrifugal molding, first, a liquid resin is poured into the inside of a drum rotated at a high speed to cause gelation.
By taking it out, a cylindrical molded body having a uniform thickness is formed. Next, the sheet-shaped molded body obtained by cutting the cylindrical molded body is punched into a honeycomb shape using a mold corresponding to the shape of the button to form a button blank. And a button is manufactured by cutting a button blank.

In the case of rod-tube molding, a rod-shaped molded body is formed by pouring a liquid resin into a pipe having a cross section of a predetermined shape and gelling the molded body.
A button blank is created by slicing to a predetermined thickness. And a button is manufactured by cutting a button blank.

When a button having a patterned pattern that is color-coded by centrifugal molding is formed, a plurality of resin compositions having different colors obtained by mixing different coloring pigments with a liquid resin are sequentially poured. Make a pattern. Further, when a button having a patterned pattern that is color-coded by using a rod tube molding is formed, a plurality of liquid resins having different colors are simultaneously fed from separate nozzles to the pattern forming tray at the same time. Resins of different colors are laminated on the above, and the laminated resin is poured into a pipe so that the resins are not mixed with each other to form a pattern.

[0011]

However, since the unsaturated polyester resin and vinyl ester resin are liquid, they can be applied to casting such as the above-mentioned centrifugal molding and rod tube molding, but they are easy to handle (handling). And is unsuitable for extrusion molding.

That is, in extrusion molding, a compound sheet or compound block obtained by molding a resin composition into a sheet or block shape is bundled in a rod shape so that a cross section has a desired pattern, and patterning is performed. To obtain an uncured rod-like compound. Next, the rod-shaped compound is molded into a desired diameter with a ram-type extrusion molding machine, and the extruded uncured rod-shaped molded body is sliced and cut to a predetermined thickness to obtain an uncured plate-shaped molded body. Get. Then, the obtained uncured plate-like molded body is poured into a button molding die and heated and press-molded to obtain a button having a pattern.

As described above, in the extrusion molding, a pattern is formed by combining a compound sheet or a compound block, and the pattern is compressed as it is to a small size, and the extruded rod-shaped compact is hardened by hot pressing. .

Therefore, the molding material used for the extrusion molding of the button having the pattern needs to be a so-called tack-free solid material having low adhesiveness. From this,
When a liquid resin made of an unsaturated polyester resin or a vinyl ester resin is used as a molding material for a button applied to extrusion molding, in order to reduce stickiness and improve handling properties, it is necessary to increase the viscosity of the liquid resin. Become indispensable. In addition, the molding material used for the extrusion molding is required not to be mixed with each other both at the time of molding and after the molding, and to be able to maintain the pattern designed before the molding. Furthermore, the molding material used for extrusion molding needs to be a solid having fluidity to the extent that molding is possible.

In centrifugal molding and rod tube molding, since the pattern is formed by pouring the liquid resin several times, it is relatively easy to prepare a button having a plurality of colors. Only a button having a specific type of pattern such as a pattern, a ripple pattern, a dot pattern, etc. can be formed, whereas in extrusion molding, a button having a desired arbitrary pattern can be easily formed. it can.

Conventionally, as a button molding material applied to extrusion molding, a urea resin thickened material is known, but a button molding material containing an unsaturated polyester resin and / or a vinyl ester resin is not known. . Therefore,
There has been a demand for a button molding material containing an unsaturated polyester resin and / or a vinyl ester resin applied to extrusion molding.

Conventionally, a molding material obtained by thickening an unsaturated polyester resin using only a pregelling with a thickener has been used for hot press molding of a button. For example, Japanese Patent Publication No. 58-57301 discloses that, as a molding material for a button for hot press molding in a state sandwiched between films, aluminum alkoxide is added to a polyester resin obtained by adding one kind of pearl pigment. 200-2
A resin composition pregelled to a viscosity of 000 poise is disclosed.

However, as a result of investigations by the inventors of the present invention, it has been found that an unsaturated polyester resin is produced only by pregelling with a thickener such as magnesium oxide or aluminum alkoxide which is generally used for an unsaturated polyester resin. Thickened molding materials are unsuitable for extrusion molding. That is, since the rubber material of the above-mentioned button molding material has an increased rubber elasticity with an increase in the molecular weight, an unstable flow called a ballast effect or melt fracture occurs at the time of extrusion molding. Therefore, the extruded rod-like material swells into a rubber-like shape, so that the cross-section becomes jagged or the surface has wavy irregularities, so that the shape is unstablely disturbed. As a result, there arises a problem that the pattern is collapsed during molding and a button having a desired pattern cannot be obtained.

The present invention has been made to solve the above problems, and can form a button having excellent physical properties, has excellent handleability, and has excellent flow stability during molding. Button molding material and button molding
An object of the present invention is to provide a method for manufacturing a button using a material .

[0020]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, have found that a thermosetting resin composed of an unsaturated polyester resin and / or a vinyl ester resin, 3D polystyrene powder or unsaturated polyester to reduce stickiness
That the molding compound for buttons containing an anti-adhesive agent consisting of a resin cured product powder can form a button with excellent physical properties, has excellent handleability, and has excellent flow stability during molding. They have found and completed the present invention.

That is, in order to solve the above problems, the button molding material according to the first aspect of the present invention comprises a thermosetting resin comprising an unsaturated polyester resin and / or a vinyl ester resin; 3D polystyrene powder or unsaturated polyether to reduce the stickiness of
And an anti-adhesion agent comprising a hardened steal resin powder .

According to the above configuration, the tackiness of the thermosetting resin is reduced by the antiadhesive, so that the handleability is excellent. Therefore, for example, a pattern assembly for extruding a button having a pattern can be formed. Also,
Since it has appropriate fluidity, molding is easy.

Further , according to the above configuration , not only the tackiness of the thermosetting resin is reduced by the antiadhesive agent , but also the
The rubber elasticity is relatively low as compared with the case where a thickener such as magnesium oxide is mixed with the thermosetting resin to reduce the tackiness. Therefore, there is no unstable flow at the time of molding, such as a ballast effect at the time of extrusion molding or melt fracture, and the flow stability at the time of molding is excellent.

Further, according to the above configuration, a button having excellent physical properties can be formed since it contains an unsaturated polyester resin and / or a vinyl ester resin.

According to a second aspect of the present invention, there is provided a button molding material according to the first aspect of the present invention, wherein the refractive index of the anti-adhesive agent and the thermosetting are set. The difference between the refractive index of the cured product of the conductive resin and the cured product is 0.1.
03 or less.

According to the above configuration, it is possible to manufacture a button having further excellent transparency.

Furthermore, the molding material for a button according to the invention of claim 3 is the same as the molding material for a button of claim 1 or 2, but does not mix with each other, and can maintain a pattern that has been assembled before molding at the time of molding. Each of which comprises at least two or more resin compositions having different colors, wherein each of the resin compositions has a thermosetting resin composed of an unsaturated polyester resin and / or a vinyl ester resin, and an adhesiveness of the thermosetting resin. Three-dimensional polystyrene powder to reduce
Or an anti-adhesion agent comprising a powder of a cured unsaturated polyester resin .

According to the above arrangement, a button having a pattern can be formed. In addition, because of excellent flow stability at the time of molding, pattern collapse during molding is prevented, and pattern pattern retention is improved. Manufacture of the button of the invention according to claim 4
A method according to any one of claims 1 to 3.
It is characterized in that a molding material for extrusion is extruded.
According to the above configuration, a button having a pattern is pushed out.
Can be molded. In addition, the molding material for the button
Has an appropriate fluidity and is easy to mold. Ma
In addition, the above molding material for buttons has excellent flow stability during molding.
As a result, pattern collapse during molding is prevented.

Hereinafter, the present invention will be described in detail. The molding material for a button according to the present invention reduces the adhesiveness of a thermosetting resin composed of an unsaturated polyester resin and / or a vinyl ester resin (hereinafter, simply referred to as a thermosetting resin) and the thermosetting resin. With three-dimensional bridges for
An anti-adhesion agent comprising a cured fat product .

According to the above configuration, a molding material having low tackiness and excellent handleability is obtained. Also, since it has appropriate fluidity, molding is easy. Further, the rubber elasticity is relatively low, and the flow stability during molding is excellent. In addition, a button having excellent physical properties can be formed.

The thermosetting resin according to the present invention is a thermosetting resin comprising an unsaturated polyester resin and / or a vinyl ester resin (hereinafter simply referred to as a thermosetting resin).

The above-mentioned unsaturated polyester resin comprises a polymer having a polymerizable double bond obtained by condensing an unsaturated polycarboxylic acid and a polyhydric alcohol and / or an epoxy compound by a conventional method, and a vinyl monomer. It is a mixture with a monomer. If necessary, part of the unsaturated polybasic acid can be replaced with a saturated polybasic acid.

The vinyl ester resin comprises a polymer having a polymerizable double bond obtained by reacting an unsaturated monocarboxylic acid such as (meth) acrylic acid with a terminal of an epoxy resin, and a vinyl monomer Is a mixture with

The vinyl monomer used for the unsaturated polyester resin and / or vinyl ester resin includes:
For example, styrene, a styrene derivative, an alkyl methacrylate, or the like can be used. The content of the vinyl monomer in the unsaturated polyester resin and / or the vinyl ester resin is not particularly limited, but is preferably 20 to 50% by weight.

The unsaturated polyester resin and / or vinyl ester resin is a thermosetting resin which is cured by radical polymerization of a terminal double bond of a polymer and a vinyl monomer. Therefore, a curing agent is usually added to the molding compound for buttons. As the curing agent, an organic peroxide or the like generally used for an unsaturated polyester resin or a vinyl ester resin can be used, and is not particularly limited. Also, the amount of the curing agent used is not particularly limited.

In the present invention, the anti-adhesive agent can be dispersed in the thermosetting resin to reduce the adhesiveness,
In addition, any material may be used as long as it is inert to the thermosetting resin. Anti-adhesion made of cured resin with three-dimensional crosslinking
By using the agent, a button having excellent transparency can be formed.

[0037]

As the above-mentioned cured resin, a powder of a cured resin obtained by curing by addition polymerization is preferable. By using the resin cured product having the above configuration, a button having excellent physical properties such as crack resistance can be obtained. Specific examples of the resin cured product powder having three-dimensional crosslinking by addition polymerization include a three-dimensional polystyrene powder ; a cured thermosetting resin powder such as a cured unsaturated polyester resin powder, a cured vinyl ester resin powder ; Can be used.

In order to reduce the stickiness, an anti-adhesive
Even if an inorganic filler is used in combination with the resin cured product as a stopper,
Good. Specific examples of the inorganic filler include hydroxylated alcohol.
Various metal hydroxides such as ruminium and magnesium hydroxide
Material, calcium carbonate, talc, clay, silica, aluminum
Na, quartz, calcium silicate and the like can be used. Up
Of the above examples, aluminum hydroxide is preferred. Nothing
The machine filler may use only one kind, or two kinds
The above may be appropriately mixed and used. The anti-adhesive agent,
It may be in the form of a powder, but preferably has an average particle size in the range of 1.5 μm to 100 μm, and more preferably has an average particle size in the range of 1.5 μm to 50 μm.

[0040] As antiblocking agents described above, the difference in refractive index between the cured product of the thermosetting resin is hard resin is within 0.03
When a compound or a cured resin and an inorganic filler are used, a button having excellent transparency can be manufactured.

As the anti-adhesive agent satisfying the above conditions,
A cured product obtained by curing the thermosetting resin is particularly suitable, but is not particularly limited. For example, when an unsaturated polyester resin (trade name “Epolac RF-9001”, manufactured by Nippon Shokubai Co., Ltd.) is used as the thermosetting resin, the refractive index of the unsaturated polyester resin is approximately equal to the refractive index of the unsaturated polyester resin. -Dimensionalized polystyrene having a refractive index of 1.59 (SGP-150C manufactured by Soken Chemical)
May be used.

The amount of the tackifier added is preferably in the range of 50 to 600 parts by weight, more preferably 100 to 400 parts by weight, based on 100 parts by weight of the unsaturated polyester resin. When the addition amount of the anti-adhesive is less than 50 parts by weight, the stickiness becomes large, and the handleability deteriorates, and it becomes difficult to perform the pattern assembly work,
There is a possibility that the rubber elasticity of the molding material for a button is reduced, and the effect of preventing unstable flow such as a ballast effect or melt fracture during molding may be insufficient. On the other hand, if the amount of the anti-adhesive exceeds 600 parts by weight, the viscosity of the molding material for the button becomes too high, the load applied to the piston at the time of extrusion molding becomes large, and a large-scale apparatus is required, and equipment cost is reduced. It takes too much.

If the amount of the anti-adhesive added to 100 parts by weight of the thermosetting resin is 50 parts by weight or more and the viscosity of the button molding material does not reach 50,000 poise, the viscosity of magnesium oxide or the like is increased. What is necessary is just to thicken so that a viscosity may be set to 50,000 poise or more using an agent.

The above molding material for a button may be mixed with a thickener to further increase the viscosity. Thereby, the adhesiveness can be further reduced and the workability can be improved. The molding material for a button according to the present invention has a relatively low rubber elasticity even in the case where the viscosity is further reduced and the workability is improved by further mixing the viscosity as described above. It does not show such unstable flow.

The above-mentioned thickener is a substance having a chemical thickening action of increasing the viscosity by reacting with a thermosetting resin. Specific examples of the thickener include magnesium oxide and aluminum alkoxide. The amount of the thickener used is not particularly limited, but if it is used too much, the flow stability during molding of the button molding material may be reduced.

When a thickening agent is used, the resin composition obtained by mixing the thickening agent is allowed to stand in a 40 ° C. air oven for 24 to 48 hours in order to sufficiently exhibit the thickening action. I just need.

The viscosity of the button molding material at 25 ° C. can be controlled by adjusting the amounts of the antiblocking agent and the thickener.
It is preferably adjusted to 10,000 poise or more, and 100,000 to 1
It is more preferably adjusted within the range of 600,000 poise, and further preferably adjusted within the range of 500,000 to 1.3 million poise. Thereby, the adhesiveness can be reduced more reliably, the handleability is excellent, and the molding material is suitable for extrusion molding of a button having a pattern. If the viscosity at 25 ° C. is lower than 50,000 poise, the tackiness may increase, the stickiness may increase, and the handling property may decrease. Therefore, it is difficult to perform a pattern assembling operation for extruding a button having a pattern design. On the other hand, if the viscosity at 25 ° C. exceeds 1.6 million poise, the load applied to the piston or the like of the molding apparatus during molding becomes too large, and a large and expensive molding apparatus is required.

The viscosity of the button molding material at 25 ° C. was 10
In the case of 0 poise or less, it can be used for centrifugal molding and rod tube molding. If the viscosity is higher than 100 poise, it will be difficult to pour in and molding cannot be performed. When the viscosity at 25 ° C. of the molding material for a button is 100 poises or less, if the addition amount of the anti-adhesive is less than 50 parts by weight, the anti-adhesive will settle out, and a uniform cured product may not be obtained. .

The molding material for buttons may further contain a coloring agent, if necessary. This results in a colored button molding material. As the colorant, an organic pigment or an inorganic pigment generally used for an unsaturated polyester resin or a vinyl ester resin, for example, carbon black or the like can be used, and is not particularly limited. The color of the colorant is not particularly limited as long as it is a color suitable for expressing a pattern. Furthermore, the amount of the colorant used is not particularly limited, but generally 1 to 10 parts is preferable.

As described above, the molding material for a button according to the present invention is obtained. In addition, the method of mixing the thermosetting resin, the curing agent, the anti-adhesive agent, the thickener, the coloring agent, and the like when preparing the molding material for the button are not particularly limited.

The molding material for such buttons to the present invention, each other
The pattern that was assembled before molding was not mixed with
The resin composition comprises at least two or more resin compositions having different colors that can be maintained, wherein each of the resin compositions is a thermosetting resin composed of an unsaturated polyester resin and / or a vinyl ester resin, and an adhesive between the thermosetting resin and the thermosetting resin. And an anti-adhesive agent composed of a cured resin having three-dimensional cross-linking for reducing the property. This makes it possible to manufacture a button having a color-coded pattern.

In order to impart different colors to the resin compositions, for example, two or more resin compositions containing colorants of different colors may be used, but there is no particular limitation. When two or more resin compositions are used, components other than the colorant in each resin composition may be the same or different.

Next, a method for manufacturing a button using the molding material for a button according to the present invention will be described with reference to two types of resin compositions (hereinafter referred to as a resin composition A and a resin composition B) having different colors according to the present invention. This will be described below with reference to an example in which a disc-shaped button having a two-color pattern is manufactured using a button molding material made of The “pattern pattern” of the button indicates a pattern viewed from a direction perpendicular to the surface of the article when the button is attached to the article such as clothes.

The button according to the present invention has, for example, as shown in FIG. 2, a two-color pattern formed by a ground color portion 2 and a spiral pattern portion 3 having a different color from the ground color portion 2. It is a disc-shaped button 1.

The ground color portion 2 is made of a resin composition A containing a colorant a.
From the cured resin A 'obtained by curing the resin. The spiral pattern portion 3 is made of a cured resin B ′ obtained by curing a resin composition B containing a colorant a and a colorant b having a different color.

Regarding the method of forming a pattern by combining the resin composition A and the resin composition B, a method of forming the resin composition A and the resin composition B into a sheet shape and laminating the obtained compound sheets, respectively. Will be described with reference to FIG.

First, the resin composition A is formed into a sheet by compression or rollering.
Get. In addition, the resin composition B is formed into a sheet by compression or rollering to obtain a compound sheet 5.

When performing the patterning, as shown in FIG.
A mold for mold assembly 10 is used in which a cylindrical pipe having an inner diameter equal to the inner diameter of the insertion port of the extruder is cut in half.

First, as shown in FIG. 1, a compound sheet 4 and a compound sheet 5 are placed inside each pattern assembling mold 10 in a pattern perpendicular to the longitudinal direction of the pattern assembling mold 10. Then, the layered compound 6 and the layered compound 7 are obtained.

Next, the laminating compound 6 and the laminating compound 7 are integrated into a cylindrical compound (molding material for a button) by combining the pattern assembling dies 10, 10. Remove the column compound. By performing the pattern assembling in this manner, a pattern having a desired cross section, that is, a two-color pattern formed by a ground color portion made of the resin composition A and a spiral pattern portion made of the resin composition B A columnar compound is obtained.

The method of forming the pattern by combining the resin composition A and the resin composition B is not limited to the above method. That is, for example, each of the resin composition A and the resin composition B formed into a rod shape may be bundled, or those formed into a block shape may be combined.

Next, a method of performing extrusion molding using a columnar compound will be described with reference to FIG.

First, the extrusion molding machine 20 used for extrusion molding will be described. In addition, the extruder 20
Is not limited only to the configuration shown in FIG.

As shown in FIG. 3, the extrusion molding machine 20 is adapted to produce an uncured cylindrical molded body having a desired diameter, and has an insertion opening 21 for inserting the cylindrical compound 8 therein. Die 2 from which cylindrical moldings are extruded
2. Includes an inclined portion 23 for narrowing the diameter of the cylindrical compound 8 and supplying it to the die 22, a plunger 24 for pressing the cylindrical compound 8, a receiving portion 25 for receiving the extruded cylindrical molded body, and the like. ing.

As described above, the inner diameter of the insertion opening 21 is equal to the inner diameter of the pattern assembling dies 10. In this case, a pattern assembling die 10 having a length of 200 mm and an inner diameter of 125 mm.
・ Length 200mm, diameter 125, patterned using 10
Since the column-shaped compound 8 of mm is used, the inner diameter of the insertion port 21 is 125 mm.

The inner diameter of the die 22 is the desired diameter of the columnar molded body, that is, the desired diameter of the button 1, and in this case, 25 mm. The length of the die 22 may be long enough to make the diameter of the obtained columnar molded body substantially uniform, but in this case, it is 100 mm.

Further, the inclined portion 23 is provided so that the distance from the insertion port 21 is longer than the length of the columnar compound 8. In this case, the distance from the insertion port 21 is 2
00 mm. The length of the inclined portion 23 along the extrusion direction is set so that the inclination angle is such that the diameter of the columnar compound 8 can be gently reduced, and in this case, it is 100 mm.

Next, an extrusion molding method using the extrusion molding apparatus 20 will be described. First, the columnar compound 8 is inserted from the insertion port 21 and the columnar compound 8 is filled in the extruder 20 as shown in FIG. Next, the cylindrical compound 8 is pushed into the die 22 at a predetermined speed by using the plunger 24.
As a result, the cylindrical compound 8 is squeezed gently at the inclined portion 23 and extruded from the die 22.
Accordingly, a columnar molded body having a predetermined diameter (in this case, 25 mm) and having a pattern pattern in which the pattern of the columnar compound 8 is small and compressed is extruded into the receiving portion 25.

Thereafter, the extruded columnar molded body is slice-cut to a predetermined thickness to obtain a disk-shaped compound. Then, the obtained disc-shaped compound is poured into a button molding die and subjected to hot press molding. As a result, the resin composition A is cured to become a cured resin A ′ forming the ground color portion 2, and the resin composition B is cured to become a cured resin B ′ forming the spiral pattern portion 3, resulting in two colors. Thus, a disc-shaped button 1 having the following pattern is obtained. The obtained button 1 can be trimmed as necessary by performing a cutting process.

The shape and the number of the pattern portions of the button manufactured using the button molding material according to the present invention can be arbitrarily selected. Therefore, for example, as shown in FIG. 4, the spiral pattern 3 of the button 1 is replaced with the linear pattern 9.
Can be manufactured.

That is, as shown in FIG.
It has a pattern formed by a ground color portion 2 made of a cured resin A 'and a plurality of linear pattern portions 9 made of a cured resin B' having a different color tone from the cured resin A '. .
The linear pattern portions 9 are formed so as not to contact the outer peripheral edge, and are formed such that both ends in the length direction of each linear pattern portion 9 are separated from each other. As described above, the cured resin A ′ and the cured resin B ′ are obtained by curing the resin composition A and the resin composition B containing the unsaturated polyester resin and / or the vinyl ester resin, respectively.

The button 1 'having the above structure is obtained by curing the resin composition A and the resin composition B containing the unsaturated polyester resin and / or the vinyl ester resin.
Excellent physical properties. In addition, the button 1 'has a pattern with an excellent design that cannot be manufactured by centrifugal molding or rod tube molding.

The shape of the pattern of the button manufactured using the molding material for a button according to the present invention can be, for example, a circle or a wave, in addition to a line or a spiral. It can also be in the shape of a character. Further, the linear pattern portions 9 and the spiral pattern portions 3 are arranged in non-contact with the outer peripheral edge of the button 1, but a button having a pattern portion in contact with the outer peripheral edge can also be manufactured.

In the above description, the case of manufacturing a button having a two-color pattern has been described as an example. However, by combining three or more types of button molding materials having mutually different colors, three or more colors are formed. It is also possible to manufacture a button having a pattern. Therefore, it is possible to manufacture a button having an arbitrary pattern using the molding material for a button according to the present invention.

Further, in the above description, the button has a disk shape, but is not particularly limited. That is, the shape of the die of the extrusion molding machine and the shape of the mold used for hot press molding may be changed according to the shape of the button. Further, the shape of the details can be changed by performing cutting without changing these shapes.

The method for manufacturing a button using the molding material for a button according to the present invention is not particularly limited. That is, when manufacturing a button having a pattern, molding can be performed by using a rod tube molding or centrifugal molding instead of using extrusion molding. When a button having no pattern is manufactured, the button can be formed by, for example, press molding.

[0077]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto. In the examples and comparative examples, "parts" indicates "parts by weight". The buttons were manufactured using the extrusion molding machine described above.

The viscosity of the molding compound for a button was measured by the following method. Further, the pattern pattern retention during molding was evaluated by the following method. Further, the transparency of the button and the cutting workability were evaluated by the following methods.

(A) Viscosity at 25 ° C. A button molding material having a viscosity of 1,000 poise or less was measured by the method specified in JIS K 6901 4.4.1. For molding materials for buttons having a viscosity exceeding 1000 poise, the number of spindle rotations was measured using a helipath rotational viscometer (HBT DV-II type viscometer, manufactured by Brookfield, USA) equipped with a No. F spindle.
The measurement was performed at 0.5 rpm at a temperature of 25 ° C.

(B) Pattern-pattern retention The pattern-pattern retention was evaluated by visually observing a rod-shaped molded product extruded from a die of an extrusion molding machine, and by evaluating the degree of swelling of the rod-shaped molded product due to the ballast effect. And, when the swelling of the rod-shaped molded body is not recognized and the pattern pattern before molding is held, it is regarded as ○, and when the swelling of the rod-shaped molded body is large and the pattern pattern before molding is completely collapsed, it is regarded as ×. , ○, ○ 〜 △, △, △ 〜
×, × was evaluated on a five-point scale.

(C) Transparency The transparency of the button was evaluated by visual observation. When the transparency was extremely excellent, the evaluation was ○, and when the transparency was very poor, the evaluation was ×. The evaluation was made in five stages of Δ to × and ×.

(D) Cutting workability The cutting workability was evaluated as ○ when cutting was possible, and × when cracking or chipping occurred during cutting.

[Refractive index] Table 1 shows the refractive index of the thermosetting resin alone used in the following examples. The refractive index of a thermosetting resin alone is determined according to JIS K
It measured using the measuring method of 7105.

[0084]

[Table 1]

Table 2 shows the refractive index of the antiblocking agent used in the following examples. In addition, the refractive index of the cured unsaturated polyester resin powder was measured using a measuring method of JIS K 7105.

[0086]

[Table 2]

Comparative Example 1 First, 100 parts of an unsaturated polyester resin (trade name “Epolac N-730”, manufactured by Nippon Shokubai Co., Ltd.) as a thermosetting resin, and aluminum hydroxide (trade name) as an anti-adhesive agent "Heidilite H-320" (manufactured by Showa Denko KK) 250 parts, curing agent (trade name "PerhexaTM")
H "; Nippon Yushi Co., Ltd.) 0.5 part, 1.0 part of magnesium oxide as a thickener, and 2 parts of carbon black as a colorant a were uniformly mixed using a kneader,
It was left in an air oven at 40 ° C. for 24 hours to perform thickening by a thickener, thereby producing a black resin composition A to be the ground color portion 2.

The viscosity of the obtained resin composition A at 25 ° C. was 5
It was 60,000 poise. Table 3 shows the composition of the resin composition A (excluding the colorant) and the conditions for thickening with the thickener. Table 4 shows the viscosity at 25 ° C. of the resin composition A. The resin composition A was stretched into a sheet by compression to obtain a compound sheet 4.

Next, except that a white pigment (trade name “TR Color White”; manufactured by Toyo Ink Mfg. Co., Ltd.) is used as the colorant b instead of carbon black, In the same manner, a white resin composition B to be the spiral pattern portion 3 was obtained. Then, the resin composition B is stretched into a sheet by compression,
Compound sheet 5 was obtained.

Next, as shown in FIG. 1, each of the compound sheets 4
And the compound sheet 5 is packed in layers so that the cross section perpendicular to the length direction of the pattern assembling mold 10 becomes a desired pattern, and the laminated compound 6 and the laminated compound 7 are packed.
I got

Subsequently, the laminating compound 6 and the laminating compound 7 were integrated into a columnar compound by combining the pattern assembling dies 10, 10, and then the columnar compound was taken out from the pattern assembling dies 10. .
By performing the pattern assembling in this way, the cross section is formed by a desired pattern, that is, a ground pattern portion formed of the resin composition A and a spiral pattern portion formed of the resin composition B.
A columnar compound with a color pattern was obtained.

Next, the columnar compound 8 was extruded using the extruder 20 described above. That is, first, the columnar compound 8 is inserted from the insertion port 21,
As shown in FIG. 3, the cylindrical compound 8 was filled in the extruder 20. Next, the cylindrical compound 8 was pushed into the die 22 at a predetermined speed using the plunger 24. Thereby, the cylindrical compound 8
The diameter of the die 22 is gradually reduced by the inclined portion 23.
At an extrusion speed of 2500 mm / min. As a result, a columnar molded body having a diameter of 25 mm and having a pattern formed by compressing the pattern of the cylindrical compound 8 was extruded into the receiving portion 25. Table 4 shows the results of evaluating the pattern retention in extrusion molding.

Further, the extruded cylindrical molded body was slice-cut to a predetermined thickness to obtain a disk-shaped molding material for a button. Then, the obtained disc-shaped button molding material was injected into a direct-pressure button molding die having an inner diameter of 25 mm, and was subjected to heat press molding under the conditions of a molding temperature of 135 ° C. and a molding time of 7 minutes, and was post-cured. .

Thus, a disc-shaped button 1 having a two-color pattern formed by the ground color portion 2 and the spiral pattern portion 3 was obtained. Table 4 shows the results of evaluating the machinability of the obtained button 1.

Next, the same reaction and operation as described above were performed except that the extrusion speed in the extrusion molding was changed to 1250 mm / min, and the pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results. In addition, the extrusion speed in the extrusion molding is a moving speed of the columnar molded body extruded from the die 22.

Further, using the resin composition obtained by removing the colorant from the resin composition A as a molding material, the same hot press molding as that of the above-mentioned disc-shaped button molding material was carried out, and a button containing no colorant was formed. I got Table 4 shows the results of evaluating the transparency of the obtained buttons.

Comparative Example 2 First, except that magnesium oxide was not used, the amount of aluminum hydroxide was changed from 250 parts to 350 parts, and the aluminum hydroxide was not left in an air oven at 40 ° C. for 24 hours.
The same reaction and operation as in Comparative Example 1 were performed to produce a resin composition A and a resin composition B. Table 3 shows the composition of the resin composition A (excluding the coloring agent). In addition, 25 of the resin composition A
Table 4 shows the viscosity at ° C.

Further, the same operation as in Comparative Example 1 was performed by setting the extrusion speed in the extrusion molding to 2500 mm / min to obtain a button 1. Table 4 shows the results of the evaluation of the pattern retention in the extrusion molding, together with the results of the evaluation of the cutting workability of the obtained button 1.

Next, the same reaction and operation as described above were carried out except that the extrusion speed in the extrusion molding was changed to 1250 mm / min, and the pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Further, the same hot press molding as in Comparative Example 1 was performed using the resin composition obtained by removing the coloring agent from the resin composition A, and the results of evaluation of the transparency of the obtained buttons were shown in Table 4.
Shown in

Example 1 First, an unsaturated polyester resin (trade name “Epolac N-730”; manufactured by Nippon Shokubai Co., Ltd.) was used as an antiblocking agent instead of 250 parts of aluminum hydroxide in Comparative Example 1 . Comparative Example 1 except that 100 parts were used and the amount of magnesium oxide was changed from 1.0 part to 0.8 part.
By performing the same reaction and operation as described above, resin composition A and resin composition B were produced. Table 3 shows the composition of the resin composition A (excluding the colorant) and the conditions for thickening with the thickener. Table 4 shows the viscosity at 25 ° C. of the resin composition A.

Further, the same operation as in Comparative Example 1 was performed by setting the extrusion speed in the extrusion molding to 2500 mm / min to obtain a button 1. Table 4 shows the results of the evaluation of the pattern retention in the extrusion molding, together with the results of the evaluation of the cutting workability of the obtained button 1.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 1250 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in the extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Further, the same hot press molding as in Comparative Example 1 was performed using the resin composition obtained by removing the coloring agent from the resin composition A, and the results of evaluating the transparency of the obtained buttons were shown in Table 4.
Shown in

Example 2 First, as the thermosetting resin, a vinyl ester resin (trade name “Epolac RF-9001”; manufactured by Nippon Shokubai Co., Ltd.) instead of the unsaturated polyester resin in Comparative Example 1 .
Using 100 parts, instead of 250 parts of aluminum hydroxide in Comparative Example 1 , a three-dimensional polystyrene powder (manufactured by Soken Chemical Co., Ltd .; trade name "SGP-1") was used as an antiadhesive.
Resin Composition A and Resin Composition B were produced by using 110 parts of the same composition and reaction as in Comparative Example 1 , except that 110 parts were not left in an air oven at 40 ° C. for 24 hours. Composition of resin composition A (excluding colorant)
Are shown in Table 3. Table 4 shows the viscosity at 25 ° C. of the resin composition A.
Shown in

Further, the same operation as in Comparative Example 1 was performed by setting the extrusion speed in the extrusion molding to 2500 mm / min to obtain a button 1. Table 4 shows the results of the evaluation of the pattern retention in the extrusion molding, together with the results of the evaluation of the cutting workability of the obtained button 1.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 1250 mm / min, and the pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Further, the same hot press molding as in Example 1 was performed using the resin composition obtained by removing the coloring agent from the resin composition A, and the results of evaluation of the transparency of the obtained buttons were shown in Table 4.
Shown in

Comparative Example 3 First, talc (trade name “TARU”) was used as an antiadhesive instead of 250 parts of aluminum hydroxide in Comparative Example 1 .
KAN NHAYSl "(manufactured by Hayashi Chemicals) 180
Resin composition A and resin composition B were produced using the same reaction and operation as in Comparative example 1 , except that the mixture was not left in an air oven at 40 ° C. for 24 hours.
Table 3 shows the composition of the resin composition A (excluding the coloring agent). Table 4 shows the viscosity at 25 ° C. of the resin composition A.

Further, the same operation as in Comparative Example 1 was performed by setting the extrusion speed in extrusion molding to 2500 mm / min, and a button 1 was obtained. Table 4 shows the results of the evaluation of the pattern retention in the extrusion molding, together with the results of the evaluation of the cutting workability of the obtained button 1.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 1250 mm / min, and the pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Further, the same hot press molding as in Comparative Example 1 was performed using the resin composition obtained by removing the coloring agent from the resin composition A, and the results of evaluation of the transparency of the obtained buttons were shown in Table 4.
Shown in

[ Comparative Example 4 ] First, the amount of magnesium oxide was changed from 1.0 part to 1.2 parts without using aluminum hydroxide, and the standing time in an air oven at 40 ° C was changed from 24 hours. Except for changing to 48 hours, the same reaction and operation as in Comparative Example 1 were performed.
Resin composition A and resin composition B were produced. Table 3 shows the composition of the resin composition A (excluding the colorant) and the conditions for thickening with the thickener. Table 4 shows the viscosity at 25 ° C. of the resin composition A.

Further, the same operation as in Comparative Example 1 was performed by setting the extrusion speed in the extrusion molding to 2500 mm / min, and a button 1 was obtained. Table 4 shows the results of the evaluation of the pattern retention in the extrusion molding, together with the results of the evaluation of the cutting workability of the obtained button 1.

Next, the same reaction and operation as described above were performed except that the extrusion speed in the extrusion molding was changed to 1250 mm / min, and the pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Further, using the resin composition obtained by omitting the coloring agent from the resin composition A, the same hot press molding as in Comparative Example 1 was performed, and the results of evaluation of the transparency of the obtained buttons were shown in Table 4.
Shown in

Comparative Example 5 First, 100 parts of a urea resin and 2 parts of carbon black were uniformly mixed using a kneader to prepare a resin composition A.
Table 3 shows the composition of the resin composition A (excluding the coloring agent). Table 3 shows the viscosity at 25 ° C. of the resin composition A.

Next, 100 parts of a urea resin and 2 parts of a white pigment (trade name “TR Color White”; manufactured by Toyo Ink Mfg. Co., Ltd.) were uniformly mixed using a kneader to obtain a resin composition B.

Further, the same operation as in Comparative Example 1 was performed by setting the extrusion speed in the extrusion molding to 2500 mm / min, and a button 1 was obtained. Table 4 shows the results of the evaluation of the pattern retention in the extrusion molding, together with the results of the evaluation of the cutting workability of the obtained button 1.

Next, the same reaction and operation as described above were carried out except that the extrusion speed in extrusion molding was changed to 1250 mm / min, and the pattern retention was evaluated. Table 4 shows the results.

Next, the same reaction and operation as described above were performed except that the extrusion speed in extrusion molding was changed to 500 mm / min, and the pattern / pattern retention was evaluated. Table 4 shows the results.

Further, the same hot press molding as in Comparative Example 1 was performed using the resin composition obtained by removing the coloring agent from the resin composition A, and the results of evaluation of the transparency of the obtained buttons were shown in Table 4.
Shown in

[0129]

[Table 3]

[0130]

[Table 4]

As is clear from the results shown in Table 4, it is understood that the molding material for a button according to the present invention has excellent pattern and pattern retention during extrusion molding. As is clear from the results in Table 4, the molding material for a button according to the present invention is:
It turns out that it is excellent in transparency and cutting workability.

Comparative Example 6 The viscosity of an unsaturated polyester resin (trade name “Epolac G-470”; manufactured by Nippon Shokubai Co., Ltd.) as a comparative molding material for buttons was measured. Table 5 shows the results.

[0133]

[0134]

[0135]

[Table 5]

[0136]

According to the constitution of the present invention, a button having excellent physical properties can be formed, excellent in handleability, and
Molding compositions and the use which is excellent in flow stability during molding button
There is an effect that a method for manufacturing a button using the molding material for a button can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of an example of a molding material for a button of the present invention.

FIG. 2 is a plan view of an example of a button manufactured using the molding material for a button.

FIG. 3 is a schematic sectional view of an extrusion molding machine for molding the molding material for a button.

FIG. 4 is a plan view of another example of a button manufactured using the button molding material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 button 1 'button 2 Background color part 3 Spiral pattern part 4 Compound sheet 5 Compound sheet 6 Laminated compound 7 Laminated compound 8 Column compound 9 Linear pattern part 10 Pattern assembling type

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-119590 (JP, A) JP-A-8-67724 (JP, A) JP-A-5-93070 (JP, A) JP-A 50-119 32258 (JP, A) JP-A-54-131441 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C08L 67/06-67/07 C08L 63/10 C08L 25/06 A44B 1/02 C08F 299/00-299/04

Claims (4)

(57) [Claims] 1. A thermosetting resin comprising an unsaturated polyester resin and / or a vinyl ester resin, and a three-dimensional polystyrene for reducing the tackiness of the thermosetting resin.
A molding material for a button, comprising: an anti-adhesive comprising a powder of a ren or a powder of a cured unsaturated polyester resin . 2. The molding material for a button according to claim 1, wherein a difference between a refractive index of said anti-adhesive agent and a refractive index of a cured product of said thermosetting resin is within 0.03. . 3. An unsaturated polyester resin comprising at least two resin compositions of different colors, which do not mix with each other and can maintain a patterned pattern formed before molding at the time of molding. and/
Or three-dimensionalization to reduce the adhesiveness of the thermosetting resin composed of a vinyl ester resin and the thermosetting resin .
Polystyrene powder or cured unsaturated polyester resin
The molding material for a button according to claim 1 or 2, further comprising a powdery anti-adhesive agent. 4. A button according to claim 1, wherein
Characterized by extruding a tin molding material.
Production method of tongue.