WO2004052612A1 - ベルト式連続製板装置および板状重合物の製造方法 - Google Patents
ベルト式連続製板装置および板状重合物の製造方法 Download PDFInfo
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- WO2004052612A1 WO2004052612A1 PCT/JP2003/015651 JP0315651W WO2004052612A1 WO 2004052612 A1 WO2004052612 A1 WO 2004052612A1 JP 0315651 W JP0315651 W JP 0315651W WO 2004052612 A1 WO2004052612 A1 WO 2004052612A1
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- Prior art keywords
- belt
- plate
- roll
- polymer
- type continuous
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
- B29C39/16—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length between endless belts
Definitions
- the present invention relates to a belt-type continuous plate-making apparatus for producing a plate-like product (plate-like polymer) by continuously polymerizing a polymerizable raw material, and a method for producing a plate-like polymer using this apparatus.
- plate-like polymers obtained from methyl methacrylate as a main raw material are used in sanitary applications such as signboards, building materials, passes, lighting, and a wide variety of other fields.
- it has also been used as a light guide plate of a display device such as a liquid crystal display, and the demand has been rapidly increasing due to the worldwide adoption of IT.
- Such a light guide plate is, of course, required to have high optical properties as a material.
- the dimensional accuracy in the thickness direction is much higher than that of conventional applications (hereinafter referred to as “ May be abbreviated as “thickness accuracy”).
- a continuous casting method using a belt-type continuous plate making apparatus as a method for continuously producing a plate-like polymer.
- This belt-type continuous plate making machine supplies a polymerizable material from one side between two opposing upper and lower endless belts running at the same speed in the horizontal direction, and heats the same as the endless belt moves.
- a belt surface holding mechanism a plurality of pairs of upper and lower rolls whose axes are orthogonal to the belt running direction are provided along the belt running direction.
- the thickness accuracy of the polymer plate in the width direction is generated by the rigidity of the roll body of the upper and lower roll pairs, the arrangement interval of the upper and lower roll pairs in the belt running direction, and the linear load applied to the belt surface from the upper roll. It is determined by conditions such as the liquid pressure in the raw material between the rolls and the tension of the endless belt.
- a method for improving the thickness accuracy in the width direction in a belt-type continuous plate making apparatus for example, as shown in Japanese Patent Publication No. 51-27467, a belt using a liquid pressure in the raw material between a pair of upper and lower rolls is used.
- the body of the roll is designed to have high rigidity and the shaft is designed to have low rigidity, and the shaft is deformed preferentially to follow the volume shrinkage of the liquid material, so that it can be applied to the belt surface.
- the surface appearance of the product substantially depends on the surface condition of the endless belt on the side in contact with the product, so the smoothness of the surface of the endless belt is extremely important. For example, if the surface of the endless belt is not sufficiently polished and the fine irregularities remain, the fine irregularities are transferred to the mating surface of the plate-like product, which may be seen as small scratches visually. Also, if there are locally large irregularities on the surface of the endless belt, bright spots may be generated on the plate surface. Such plate-shaped products have become more difficult to use for optical applications that require extremely strict surface smoothness in recent years.
- As an endless belt suitable for a belt-type continuous plate making apparatus for example, as shown in Japanese Patent Publication No.
- H02-334490 water is removed under an electrolytic strength of 1.0 V / cm or more.
- a stainless steel sheet that has been subjected to anodic electrolysis through a medium containing 0% or more is exemplified.
- the electrolytic treatment disclosed in Japanese Patent Publication No. H02-334490 is intended to improve the solvent resistance of a plate-shaped product, and has an effect on the smoothness of the surface of an endless belt. Is not touched. That is, this publication does not aim at the smoothness and the suppression of the bright spots of the plate-shaped product which is a problem in the optical application, and does not consider at all what kind of configuration is effective in such a point. Disclosure of the invention
- an object of the present invention is to provide a belt-type continuous plate-making apparatus capable of producing a plate-shaped polymer having extremely high plate thickness accuracy regardless of the belt width of the apparatus, and a method of producing such a plate-shaped polymer. Is to provide.
- a further object of the present invention is to provide a belt-type continuous plate-making apparatus capable of producing a plate-like polymer excellent in optical applications without scratches and bright spots, and a method for producing such a plate-like polymer. .
- the present inventors have found that if the outer diameter of the roll body of the upper and lower roll pairs is within a specific range, the rigidity of the roll body is sufficiently high and the belt travels. It has been found that the distance between the pair of rolls in the direction can be set to an appropriate distance so that the amount of deflection of the belt becomes small, and that a plate-shaped product with extremely high plate thickness accuracy with a reduced medium-thickness shape can be obtained.
- the two endless belts arranged so that the opposite belt surfaces run at the same speed in the same direction are sandwiched between the opposite belt surfaces and the belt surfaces on both sides of the two endless belts.
- the polymerizable material is supplied from one end to a space surrounded by a continuous gasket that runs in a sloping state, and the polymerizable material is solidified while the belt runs in the heating zone.
- the upper roll contacting the upper surface of the upper belt and the lower roll contacting the lower surface of the lower belt as a belt surface holding mechanism in the heating zone of the endless belt running opposite
- a plurality of pairs of upper and lower mouths, each axis of which is orthogonal to the belt running direction, are provided along the belt running direction, and the outer diameter D of the mouth of the upper and lower mouths is 10.
- a belt-type continuous plate making apparatus characterized by having a thickness of 0 mm to 50 O mm.
- the surface of the two endless belts in contact with the polymerizable material has a surface roughness Ra defined by JIS roughness shape parameters (JISB 0601-1994) of 0.
- the surface is mirror-polished to 1 m or less, and the maximum diameter of the pinhole is 250 ⁇ m or less.
- the present invention is a method for producing a plate-like polymer, comprising obtaining a plate-like polymer from a polymerizable raw material containing methyl methacrylate using the above-mentioned belt-type continuous plate-making apparatus.
- the upper roll has the opposite direction of its own weight and the repulsive force from the raw material and the hydraulic pressure.
- the lower roll had the same direction of repulsive force from its own weight and the liquid pressure in the raw material, and it was found that the amount of deflection was much larger than that of the upper roll.
- correcting the deflection shape of the lower roll is the most effective way to eliminate the medium thickness shape of the product most effectively and to obtain a very smooth plate with no warpage on both sides. .
- the lower roll body was previously formed into a crown shape in which the center in the width direction was larger than the end by a diameter S.
- the lower roll axis of the upper and lower roll pair is supported by the fixed side wall
- the upper roll axis of the upper and lower roll pair is supported by the vertically movable beam
- the panel is provided in contact with the beam.
- the above-mentioned belt-type continuous plate making device is used to adjust the linear load applied to the belt surface by the upper roll by changing the compression length or the stretching length of the panel to thereby obtain the amount of deflection in the width direction of the upper roll and the lower roll.
- FIG. 1 is a schematic sectional view showing an example of the belt-type continuous plate making apparatus of the present invention.
- FIG. 2 is a schematic diagram showing an example of a crown port used for the lower port 4 of FIG.
- 3 (a) and 3 (b) are schematic cross-sectional views illustrating a pair of rolls having a linear load adjusting mechanism using a flat roll as an upper roll and a crown roll as a lower roll. Represents the two states that have been changed.
- 4 (a) and 4 (b) are schematic cross-sectional views illustrating a pair of rolls having a linear load adjusting mechanism using a flat roll as an upper roll and a crown roll as a lower roll. Shows two states with changed lengths.
- FIG. 5 is a perspective view showing a plate size at the time of evaluation in Examples and Comparative Examples.
- FIG. 6 is a perspective view showing a plate size at the time of evaluation in Examples and Comparative Examples.
- FIG. 1 is a schematic sectional view showing an example of the belt-type continuous plate making apparatus of the present invention.
- two endless belts (stainless steel belts, etc.) 1 and 1 ' are tensioned by main pulleys 2, 3, 2' and 3 ', respectively, and lower belt 1 is pulled by main pulley 3'.
- 'Is activated and run.
- the liquid polymerizable material containing the polymerizable compound is fed by the metering pump 5 and supplied from the nozzle 6 onto the lower belt surface.
- the width of the dress belt 1, 1 is 50 Omn!
- the thickness is preferably from 0.1 mm to 3 mm.
- the tension applied to the endless belts 1 and 1 ′ is preferably 1 kg to 15 kg per 1 mm 2 of a cross-sectional area perpendicular to the running direction.
- the endless belt 1 travels at the same speed in the same direction as the endless belt 1 by frictional force via a gasket and a plate-shaped polymer product described later.
- the running speed is preferably from 0.1 lmZm in to 10 m / min, and can be changed as appropriate according to the circumstances such as the thickness of the plate to be produced and the timing of switching the type.
- the polymerizable material is solidified in the heating zone as the endless belt 1 runs.
- the heating zone for example, the zone heated by hot water spray 8, 8 No.
- Polymerization proceeds in the heating zone, and reaches a temperature peak at a certain position due to polymerization heat.
- the polymerization is completed by heat treatment with, for example, far-infrared heaters 9 and 9 ', and a plate-like product (plate-like polymer) 10 is taken out.
- the hot water spray 8, 8 'section may be in the temperature range of 50 to: L 00 ° C
- the far infrared heater 9, 9' section may be in the temperature range of 100 ° C to 150 ° C. preferable.
- other heating methods such as hot air may be used for both sections.
- the upper and lower roll pairs of the present invention are intended for rolls in a heating zone, but not for rolls in a section to be heat-treated.
- the belt surface holding mechanism in the heating zone of the endless belts 1, 1 is composed of an upper roll in contact with the upper surface of the upper belt and a lower edge in contact with the lower surface of the lower belt.
- An orthogonal upper and lower roll pair 4, 4 ' is used. Then, the outer diameter D of the roll body of the upper and lower roll pairs 4, 4 is set to 100 mm to 5 mm.
- the effect of the present invention can be obtained. If the outer diameter D is less than 10 O mm, in some cases, the amount of deflection of the roll body becomes large enough to exceed the thickness of the plate-like product, and the upper and lower ends of the endless belt in the width direction are bent. There is a risk of contact. Also, if the outer diameter D exceeds 50 O mm, it is necessary to increase the interval P between the rolls in the belt running direction, and the weight of the rolls increases, so that the rigidity of the entire belt polymerization machine is designed to be extremely high. It becomes necessary, and equipment cost is also unfavorable.
- the outer diameter D of the roll body should be 13 O mn! Preferably, it is set to 50 O mm.
- the dimensional accuracy of the roll body of the flat roll is such that the tolerance of the outermost diameter is within 0.1 mm.
- the difference [P-D] between the arrangement interval P of the plurality of upper and lower roll pairs 4 4 ′ in the belt running direction and the outer diameter D of the roll body should be as small as possible for plate thickness accuracy.
- the difference [P-D] is less than 5 Omm in the heating zone, it may not be possible to secure the contact area between the heating medium such as hot water spray and hot air and the belt surface. This is not preferable because productivity is remarkably reduced due to delay of the process.
- the difference [PD] exceeds 500 mm, the bending of the endless belt between the pair of rolls is promoted, which is not preferable.
- the difference [P—D] between the pitch P in the belt running direction and the outside diameter D of the mouth is 50 m. It is preferable to design so as to be m to 50 O mm. Further, all the roll pairs 4, 4 'may be arranged at equal intervals in the belt running direction, or may be arranged with a partially changed interval.
- the polymerizable raw material is heated as the endless belts 1 and 1 'run, and polymerization and solidification progress, and a temperature peak occurs at a certain position due to polymerization heat.
- the heating zone including the position showing the polymerization exothermic peak is usually provided with a plurality of upper and lower roll pairs 4, 4 '.
- the lower roll 4' is a crown roll
- the upper and lower roll pairs 4, 4 The number of 'is preferably at least 4%, more preferably at least 8%, particularly preferably at least 10% of the total number.
- a plurality of crown rolls may be continuously arranged in the belt running direction, or a flat roll having a roll body outermost diameter tolerance of within 0.1 mm (hereinafter simply referred to as a “flat roll”). May be arranged alternately or intermittently every few lines.
- the polymerizable raw material travels together with the belt and solidifies while traveling.
- the lower barrel body of 4% or more of the upper and lower roll pairs has a crown shape. , More preferably at least 8%, particularly preferably at least 10%.
- the raw material supply is more
- the effective position of the crown mouth is within the 0% to 90% section, and 30% to 90%. It is more effective and preferable to concentrate on the section of%.
- the crown roll When producing a plate-like polymer using the belt-type continuous plate-making apparatus of the present invention, if the introduction position of the crown roll is on the upstream side of the polymerization exothermic peak, solidification of the raw material by the polymerization reaction is not yet completed. Since it is not in the state, the shape of the roll body is effectively transferred to the material shape. In the process where the polymerizable raw material solidifies while traveling along with the belt, when the section from the entrance of the heating zone to the position where the polymerization heat generation peak is set to 0% to 100%, the lower roll body has a crown shape.
- the pair of upper and lower rolls is preferably disposed in a section of 0% to 90%, and more preferably disposed in a section of 30% to 90%.
- FIG. 2 is a schematic sectional view showing an example of a crown roll.
- crown value represented by half the difference in the diameter of the outermost diameter (1 2 of the outermost diameter of 3 E and the central portion of the end of the roll body portion represented by the following formula (1)
- X and the amount of self-deflection y of the roll body calculated by the following equation (2) have the relationship of the following equation (3).
- This crown shape may be either a radial type or a taper type.
- roll body outer diameter D in the present invention in the case of crown roll is outermost diameter d 2 of the central portion.
- the distance in the belt traveling direction is represented by “length”
- the distance in the direction perpendicular to the belt traveling direction that is, the distance in the roll axis direction is represented by “width”.
- a roll body made of various metals such as stainless steel, iron and aluminum may be used, or a carbon-based material such as a carbon roll may be used.
- a roll body made of a composite material may be used.
- the surface of the roll body may be coated with rubber for the purpose of reducing damage to the stainless belt surface due to contact. Further, a structure may be adopted in which the outermost diameter after rubber coating has a crown shape.
- the thickness of the coated rubber is preferably 3 mm to 20 mm.
- the upper roll 4 of the upper and lower roll pairs 4 and 4 ' either a flat roll or a crown roll can be used.
- a crown roll it is desirable that the crown amount X be smaller than that of the lower crown roll 4 'in consideration of the warpage of the plate-like product.
- FIGS. 3A and 3B are schematic cross-sectional views illustrating a roll pair having a linear load adjustment mechanism using a flat roll as the upper roll 4 and a crown roll as the lower roll 4.
- FIG. Both shaft portions of the lower roll 4 ′ are supported via bearings on a side wall 12 fixed to the base and immovable.
- Both shafts of the upper roll 4 are supported via bearings on a frame 11 that can move up and down smoothly by moving up and down the support rod 13.
- the natural length Z is on both sides of the frame 11.
- Spring 14 of Z It is compressed between the frame 11 and the pedestal 15 so as to have a smaller value Z (compressed length).
- the panel constant of the panel 14 is k
- the force by which the spring 14 pushes the frame 11 up can be expressed by the following equation (4).
- the load per belt unit width transmitted from the upper roll 4 to the upper belt surface 1 Wl can be expressed by the following equation (5).
- a load acts downward on the lower crown roll 4 via the belt surface and the raw material, and the roll body deflects with this load and the roll's own weight.
- the upper side of the mouth barrel becomes convex upward, and the cross section of the liquid in the raw material has a slightly thin shape in the width direction.
- VA root length larger value Z 2 (compression length) than E when fixed by moving the base 15 downward, VA root length larger value Z 2 (compression length) than E, and the force by the following formula (6) changes to mosquito F 2 represented.
- the up-down movable beam 15 to which the panel is connected is adjusted from the extension length to make the extension length Z 2 smaller than this.
- the linear load can be adjusted in exactly the same way as when a compression spring is used.
- a preferred range of the load per unit width transmitted from the upper roll 4 to the belt surface is 10 kgZm to 200 kg / m.
- a method of adjusting a force for supporting the frame supporting the shaft portion of the upper roll from below by a spring 14 as shown in FIG. It is not limited.
- a method may be used in which a force is directly applied to the connection between the upper roll and the shaft.
- the direction of the force may be not only the upward force as shown in FIG. 3 but also a method of increasing the load downward.
- a portion for applying a force may be provided for each pair of rolls, or a plurality of pairs of rolls may be connected by a frame, and a system for applying a force to the frame via a panel may be provided.
- the material of the upper and lower endless belts 1 and 1 ' is not particularly limited as long as the material has sufficient corrosion resistance to the polymerizable material.
- stainless steels such as austenitic steel, martensitic steel, and austenitic steel-martensitic duplex stainless steel are preferable because they have high corrosion resistance to various organic compounds. Among them, austenitic stainless steel is particularly preferable.
- the surface of the upper and lower endless belts 1, 1 on the side in contact with the polymerizable raw material is specified in advance by the JIS roughness shape parameters (JISB 0601-1994). It is preferable that the mirror surface is polished so that the value of the surface roughness Ra is 0.1 ⁇ m or less. Further, the value of the surface roughness Ra is more preferably from 0.001 / m to 0.08 ⁇ .
- the surface roughness Ra was measured at five points for each of the upper and lower endless belts 1 and 1 using a conventionally known surface roughness measuring instrument, and the average of the measured values was obtained. It is.
- the mirror polishing can be performed using a conventionally known polishing machine.
- a rotary type using a grindstone or abrasive grains is preferable.
- the surface is roughly smoothed by a primary polishing using a coarse grindstone or a cannon, and the finishing is performed by a secondary polishing using a grindstone or a fine abrasive having a smaller grain size.
- the particle size of the grindstone or abrasive used in the primary polishing is preferably from 30 to 200 ⁇ , and the particle size of the grindstone or abrasive used in the secondary polishing is preferably from 2 to 30 ⁇ .
- a fluid filtered with a filter having an opening of 200 ⁇ or less is preferred as the fluid.
- the belt surface can be re-ground so as to draw a circle of 20 mm to 20 Omm with the pinhole as the center. It is possible to eliminate only the pinhole while maintaining a good mirror surface state.
- This repolishing is also preferably performed in two stages of primary polishing and secondary polishing. Through such a re-polishing operation, a mirror surface having a maximum diameter of 250 m or less can be obtained. More preferably, the maximum diameter of this pinhole is less than 200 ⁇ m!
- a device for preventing foreign matter from entering between the endless belt and the main buries on the back surface of the endless belt in front of the main pulleys at both ends As a method of the foreign matter intrusion prevention device, a resin plate made of a material that is resistant to cracking such as polycarbonate and does not deform at the surrounding temperature and has high heat resistance is brought into contact over the entire width of the back of the endless belt to form a dam.
- a method in which a brush is brought into contact with the entire width of the back of the endless belt to make a dam, and a rod longer than the width of the endless belt on which a soft cloth such as flannel is wound is brought into contact with the back of the endless belt.
- Examples of the method include damming.
- a method using a resin plate and a method using a brush are preferable, and a method using these methods together is more preferable.
- the method of installing a brush-type foreign matter entry prevention device downstream of the resin plate type foreign matter entry prevention device is as follows.Even if the resin plate is damaged, the damaged resin plate is blocked by the brush-type foreign matter entry prevention device. This is most preferable because the damaged resin plate does not enter the gap between the main pulley and the endless belt.
- the thickness of the platy polymer produced according to the present invention is preferably about 0.3 to 20 mm.
- the raw material of the platy polymer can be appropriately selected depending on the intended platy polymer.
- the continuous plate making apparatus of the present invention is particularly suitable for producing a methacrylic resin plate using methyl methacrylate as a main raw material.
- a polymerizable raw material containing 50% by mass or more of methyl methacrylate. Typical examples include methyl methacrylate alone or a mixture with other monomers copolymerizable with methyl methacrylate.
- a syrup obtained by dissolving a methyl methacrylate-based polymer in methyl methacrylate or a mixture thereof, and a syrup obtained by previously polymerizing a part of methyl methacrylate or a mixture thereof are also included.
- copolymerizable monomers include, for example, acrylate esters such as methyl acrylate, ethyl acrylate, n-butyl acrylate, and 2-ethylhexyl acrylate; ethyl methacrylate, n-metharyl acid Methacrylic esters other than methyl methacrylate such as -butyl and 2-ethylhexyl methacrylate; biel acetate, acrylonitrile, methacrylonitrile, styrene and the like.
- the polymer content is preferably adjusted to 50% by mass or less in consideration of the fluidity of the polymerizable raw material.
- a chain transfer agent may be added to the polymerizable raw material.
- the chain transfer agent for example, primary, secondary or tertiary mercaptan having an alkyl group or a substituted alkyl group can be used. Specific examples thereof include n-butyl mercaptan, i-butyl mercaptan, n-octyl mercaptan, n-dodecyl mercaptan, s-butyl mercaptan, s-dodecyl mercaptan, t-butyl mercaptan, and the like.
- a polymerization initiator is usually added to the polymerizable raw material.
- a polymerization initiator includes tert-hexinoleperoxypivalate, tert-hexinoleperoxy-2-ethynolehexanoate, di-isopropylpropylperoxydicarbonate, tert-butynolenonedecanoate, -Ptinoleperoxypiparate, lauroyl peroxide, benzoyl peroxide, tert-butylperoxylsopropyl carbonate, tert-butylinoleoxybenzoate, dicumyl peroxide, di-tert Organic peroxides such as -butyl peroxyside; 2,2,2-azobis (2,4-dimethyl'pallet nitrile), 2,2'-azobisisobutyronitrile, 1-1, -azobis (1 -Siku Azo compounds such as hexanecarbonitrile)
- additives such as crosslinking agents, ultraviolet absorbers, light stabilizers, oxidation stabilizers, plasticizers, dyes, pigments, release agents, acrylic multi-layer rubbers, etc. should be added to the raw materials. You can also.
- the apparatus shown in FIG. 1 has a total length of 10 m, and two stainless steel endless belts 1, 1, have a thickness of 1.5111111 and a width of 2 m. mm 2 tension.
- gasket 7 a polyvinyl chloride gasket is installed.
- the first half of the device has a heating zone of 5m with hot water spray 8, 8 'at 76 ° C.
- a total of 12 pairs are arranged at equal intervals so that the arrangement interval P of the upper and lower roll pairs 4, 4 and the force roll pair is 40 Omm.
- Each of the upper and lower roll pairs 4 and 4 ' is composed of a stainless steel hollow body whose surface is covered with rubber, and stainless steel solid shafts on both sides thereof.
- the outer diameter of the stainless steel body of each of the upper and lower roll pairs 4 and 4 ' is 16 Omm, the outermost diameter including the rubber part is 18 Omm, the width is 220 Omm, the stainless steel wall thickness is 4.5 mm, and the outermost It is a flat roll with a diameter tolerance of less than 0.1 mm, the outer diameter of the solid shaft is 20 mm, and the width of the solid shaft is 125 mm.
- the shaft of the upper roll 4 is supported via a bearing on a frame that can move up and down by the vertical movement of a support rod.
- the shaft of the lower roll 4 is supported via a bearing on a side wall 12 fixed to the base.
- the frame 11 supporting the shaft of the upper roll 4 and the support rod are provided.
- a panel 14 is attached between the pedestal 15 of 13 and a mechanism that can adjust the linear load from the upper side. During operation, the 6th and 7th upper and lower roll pairs 4, 4 from the raw material supply side in the heating zone, The panel 14 was adjusted so that the load from the top was 20 kg / m per belt unit width in both 4 '.
- the running speed of the endless belt 1, 1 was driven at 13 O mmZmin.
- a thermocouple was inserted together with the raw material from the raw material supply side, and the time-dependent change in the temperature of the raw material liquid near the thermocouple was measured and matched with the position of the polymerization apparatus.
- the polymerization exothermic peak was located 4.2 m from the raw material supply side of the heating zone by the hot water spray 8,8.
- crown rolls were used instead of flat rolls as the second and third upper and lower roll pairs 4, 4, and lower roll 4, from the raw material supply side.
- a plate-like product 2 was obtained in the same manner as in Example 1 except that a crown roll was used in a section of 12% to 28% of a hot water zone as viewed from the side and 17% of the total number of lower rolls.
- the crown roll, an outermost diameter d 2 is 1 8 0 containing rubber of the central portion. 0 mm (stainless cylinder outer diameter 1 6 0.
- 1 is the outermost diameter including the rubber end 7 9 It has the same structure and size as the flat roll used in Example 1 except that it is .8 mm (stainless steel body outer diameter 160.0 mm). The weight deflection of this crown roll is 0.06 mm according to the equation (2).
- a crown roll was used instead of a flat roll as the lower roll 4, with the roll pair 4, 4 and (with a line load adjustment mechanism), that is, a hot water zone of 44% to 60% when viewed from the raw material supply side. Section, 17% of the total number of lower mouths use crown! Except for / and the octopus, a plate-like product 3 was obtained in the same manner as in Example 1.
- This crown roll has the same structure and size as the crown roll used in Example 2.
- a plate-shaped product 4 having a thickness of 3 mm and a width of 280 Omm was manufactured using the apparatus shown in FIG.
- the apparatus of FIG. 1 has a total length of 100 m, and the two stainless steel endless belts 1 and 1 have a thickness of 1.5 mm and a width of 3000 mm. It is given a tension of 2 . Further, as the gasket 7, a gasket made of polychloride vinyl is installed.
- the first half of the device has a heating zone for 48 m with a hot water spray 8, 8 'at 80 ° C.
- a total of 120 pairs are arranged at equal intervals so that the arrangement interval P of the upper and lower roll pairs 4, 4, and the force roll pair is 40 Omm.
- Each of the upper and lower roll pairs 4, 4 ' is composed of a hollow body made of iron having a surface covered with rubber, and a solid stainless steel shaft on both sides thereof.
- the outer diameter of the iron body of each of the upper and lower roll pairs 4 and 4 is 264 mm, the outermost diameter including the rubber part is 28 Omm, the width is 3200 mm, the thickness of the iron part is 7.6 mm, and the outermost diameter Is a flat roll with a tolerance of within 0.1 mm, the outer diameter of the solid shaft is 8 Omm, and the width of the solid shaft is 40 Omm.
- the weight deflection of this flat roll is 0.08 mm according to equation (2).
- the shaft of the upper roll 4 in the pair of upper and lower rolls 4 and 4 ' is supported via a bearing on a frame that can move up and down by a vertical movement of a support rod.
- the shaft of the lower roll 4 ' is supported via a bearing on a side wall 12 fixed to the base.
- the frame 11 supporting the shaft of the upper roll 4 and the pedestal 15 of the support rod 13 are provided.
- Panel 14 is attached, and a mechanism that can adjust the line load from above is used. The panel 14 was adjusted so that the load from the upper side of the pair of upper and lower rolls 4, 4 'in the section of 20 to 28m from the raw material supply side in the heating zone was 30 kg Zm per unit width of the belt.
- the temperature at the end of the lower endless belt 1, in the ⁇ direction was measured every 4m with a total of 12 points of thermocouples, and the zone with the highest temperature was polymerized. It was assumed to be the position of the exothermic peak.
- the peak of the exothermic polymerization was located in the section of 40 to 44 m.
- the crown roll was used in place of the flat roll as a total of 20 lower rolls 4 in the section 20 to 28 m from the raw material supply side of the heating zone by the hot water sprays 8 and 8 of the apparatus in Fig. 1,
- a plate-like product 5 was obtained in the same manner as in Example 4 except that a crown roll was used in a section of 42% to 58% of the hot water zone as viewed from the supply side and 17% of the total number of lower rolls.
- the crown roll an outermost diameter (1 2 280.
- the rubber end including an outermost diameter di is 279.6 mm (iron cylinder part outer containing rubber of the central portion) It has the same structure and size as the flat roll used in Example 4 except that the iron part thickness is 7.6 mm and the iron part thickness is 7.6 mm.
- the set value of the spring 14 attached to the frame 11 was changed for the upper and lower roll pairs 4 and 4 from 20 to 28 m from the raw material supply side to the belt surface.
- a plate product 8 was obtained.
- the crown roll was used in place of the flat roll as a total of 70 lower rolls 4 'in the section from 0 to 28m from the raw material supply side of the heating zone by the hot water sprays 8, 8' of the apparatus in Fig. 1, In other words, the hot water zone from 0% to 5 A plate-like product 9 was obtained in the same manner as in Example 4, except that a crown roll was used in the section of 8% and 58% of the total number of lower rolls. This crown roll has the same structure and size as those used in Example 5.
- Plate products 10 and 11 were obtained in the same manner as in the case of obtaining plate product 9, except that the running speed of the endless belt was changed to 1.8 mZmin and 1.3 mZmin. At this time, the exothermic polymerization peak positions were in the sections of 32 to 36 m and 2 to 24 m, respectively.
- the outer diameter of the stainless steel body was changed to 8 Omm, and the outermost diameter including the rubber part was changed to 96 mm for 12 pairs of upper and lower rolls 4 and 4 'in the heating zone by hot water spray 8 and 8'. Except for this, the plate-like product 12 was obtained in the same manner as the example 1.
- Example 5 Out of a total of 20 lower rolls 4 ′ within a section 20 to 28 m from the raw material supply side of the heating zone by the hot water sprays 8, 8, four of the rolls from the raw material supply side were used in Example 5 for the crown opening.
- the crown roll was used for the section of 42% to 45% of the warm water zone from the raw material supply side, and 3.3% of the total number of lower rolls, Shaped product 14 was obtained.
- the thickness accuracy of products 4 to 11 and 14 was as follows, with the size of 50 plates set to 2800 mm X 1000 mm X 3 mm. Evaluation was performed in the same manner as above, except that B 2 points were within 20 Omm from both ends.
- Table 1 shows the evaluation results. Table 1 Evaluation results
- the mid-thickness shape ⁇ of the plate-shaped product 1 (Example 1) was a low value and had sufficient flatness for use as a light guide plate. Furthermore, the medium thickness T of the plate-shaped product 2 (Example 2) was a lower value, and the thickness T of the plate-shaped product 3 (Example 3) was even lower.
- the plate-shaped product 4 (Example 4) had a low value of the medium-thickness shape T and had sufficient flatness for light guide plate use.
- the thickness T of the plate-shaped products 5, 6, 7, and 8 (Example 5) is low, and the plate-shaped product 6 has extremely high flatness. I was
- the medium thickness shapes T of the plate-like products 9, 10, and 11 were all low values. This indicates that changing the continuous production speed during operation does not change the high flatness of the plate product.
- the middle thickness T of the plate-shaped product 12 (Comparative Example 1) was a high value, and the plate had poor thickness accuracy.
- the value of the medium thickness T of the plate-shaped product 13 (Example 7) was higher than that of the plate-shaped product 1 (Example 1), and the plate was not a plate having excellent thickness accuracy. It was better than a board.
- the medium thickness T of the plate-shaped product 14 (Example 8) is almost the same as that of the plate-shaped product 4 (Example 4). Because the effect was less than 4%, the effect was not great! /
- the polymerization rate of 20 mass 0/0 of methyl methacrylate syrup (the viscosity l P a ⁇ s, 20 ° C) 1 00 parts of cyclohexyl peroxide O carboxymethyl pin Pareto 0.35 parts to tert- as a polymerization initiator, a release agent was added and mixed uniformly to obtain a liquid polymerizable raw material.
- This polymerizable raw material is defoamed in a vacuum vessel, and a plate-like product (plate-like polymer) having a thickness of 2 mm, a width of 1800 mm, and a length of 1000 mm is produced using the same apparatus as that set in Example 3. did.
- the entire surface of the austenitic steel stainless steel upper and lower endless belts 1 and 1 'in contact with the polymerizable material was polished five times as primary polishing using abrasive particles having a particle size of 40 ⁇ m.
- polishing was performed twice using a grindstone having a particle size of 20 / iin.
- the surface roughness Ra of the upper and lower endless belts 1 and 1 'after the mirror polishing was determined by the JIS roughness shape parameter (JIS B0601—1994) to be 0.01 ⁇ .
- JIS B0601—1994 JIS B0601—1994
- the hot water sprays 8, 8 were operated at 80 ° C. for 2 days at a running speed of the upper and lower endless belts 1, 1 ′ of 20 OmmZmin.
- the time that the product can be obtained by continuous operation excluding the start-up operation is 37.5 hours, which means that 450 sheet products (sheet polymer) Got.
- the thickness accuracy of the product measured according to Example 3 was good, with the medium thickness T of 450 sheets being 0.02 mm.
- the 450 sheet products were visually inspected for scratches and bright spots. Specifically, the light of a fluorescent lamp was irradiated from one side of the plate-shaped product with a width of 180 mm and a length of 1000 mm, and those that were observed as streaks when visually inspected from the other side were counted as scratches. What was observed as a white spot was counted as a bright spot. As a result, out of 450 sheets, 1 to 5 small scratches were found on 7 products, and 1 to 2 bright spots were found on 8 products. there were. No product had both scratches and bright spots.
- 450 plate-like products with a thickness of 2 mm, a width of 180 Omm and a length of 1000 mm were manufactured in the same manner as in Example 9, And the presence or absence of a bright spot was visually inspected.
- 39 (about 9% of the total) products had 1 to 5 small scratches, and 198 (44% of the products) had 1 to 2 bright spots.
- 26 products had both scratches and bright spots. In other words, either scratches or bright spots In total, there were 2 1 1 products with both, but 1 4 7 (approximately 33% of the total) were at a level that was not suitable for optical applications.
- a belt-type continuous plate making apparatus capable of producing a plate-shaped polymer having extremely high thickness accuracy regardless of the belt width of the apparatus, and production of a plate-shaped polymer We can provide a method.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/537,919 US20060078640A1 (en) | 2002-12-10 | 2003-12-08 | Belt type continuous plate manufacturing apparatus and method of manufacturing sheet polymer |
Applications Claiming Priority (4)
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JP2002357915A JP4187517B2 (ja) | 2002-12-10 | 2002-12-10 | ベルト式連続製板装置および板状重合物の製造方法 |
JP2002-357915 | 2002-12-10 | ||
JP2003-58555 | 2003-03-05 | ||
JP2003058555A JP2004268288A (ja) | 2003-03-05 | 2003-03-05 | 板状製品の製造装置および製造方法 |
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WO2004052612A1 true WO2004052612A1 (ja) | 2004-06-24 |
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PCT/JP2003/015651 WO2004052612A1 (ja) | 2002-12-10 | 2003-12-08 | ベルト式連続製板装置および板状重合物の製造方法 |
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US (1) | US20060078640A1 (ja) |
WO (1) | WO2004052612A1 (ja) |
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CN100572026C (zh) * | 2005-07-25 | 2009-12-23 | 三菱丽阳株式会社 | 传送带式连续制板装置及传送带式连续制板方法 |
JP4528231B2 (ja) * | 2005-09-20 | 2010-08-18 | 富士フイルム株式会社 | 溶液製膜設備及び方法 |
AR093118A1 (es) * | 2012-10-25 | 2015-05-20 | Noven Pharma | Composiciones y metodos para la administracion transdermica de anfetamina |
DE102016116010C5 (de) | 2016-08-29 | 2023-12-21 | Fritz Egger Gmbh & Co. Og | Doppelbandpresse und Verfahren zum kontinuierlichen Pressen einer Holzwerkstoffmatte zur Bildung einer Holzwerkstoffplatte oder eines Laminats |
TW202030072A (zh) * | 2018-11-27 | 2020-08-16 | 奧地利商百德福鋼帶公司 | 製造薄片或薄膜之方法 |
CN115284511B (zh) * | 2022-10-08 | 2023-03-07 | 宿迁万佳橡胶制品股份有限公司 | 一种高弹性硅胶板的加工设备 |
Citations (7)
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JPS5849167B2 (ja) * | 1976-11-05 | 1983-11-02 | 三菱レイヨン株式会社 | 対向ベルト式連続製板方法 |
US4415509A (en) * | 1981-07-07 | 1983-11-15 | Mitsubishi Rayon Company, Ltd. | Acrylic laminated diffuser panel having high light-diffusing property and process for preparing same |
US4626187A (en) * | 1983-06-29 | 1986-12-02 | Mitsubishi Rayon Company Ltd. | Apparatus for preparing a synthetic resin plate of different colors |
US4839125A (en) * | 1986-05-16 | 1989-06-13 | Mitsubishi Rayon Co., Ltd. | Process for preparation of light-diffusing methacrylic resin plates |
JPH07137054A (ja) * | 1993-11-17 | 1995-05-30 | Sekisui Chem Co Ltd | 長尺成形体の製造方法 |
JPH08300382A (ja) * | 1995-05-08 | 1996-11-19 | Teijin Ltd | サンドイッチ構造を有する複合成形品の製造方法 |
JP2561576B2 (ja) * | 1991-06-18 | 1996-12-11 | 株式会社クボタ | 熱硬化性樹脂発泡板の製造装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2732591A (en) * | 1956-01-31 | whittum | ||
US3988098A (en) * | 1968-12-30 | 1976-10-26 | Mitsubishi Rayon Co., Ltd. | Apparatus for continuously casting a sheet and the like |
EP0165388B1 (en) * | 1981-06-16 | 1989-09-27 | Dansk Eternit-Fabrik A/S | Shaped article and composite material for its preparation |
-
2003
- 2003-12-08 US US10/537,919 patent/US20060078640A1/en not_active Abandoned
- 2003-12-08 WO PCT/JP2003/015651 patent/WO2004052612A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5849167B2 (ja) * | 1976-11-05 | 1983-11-02 | 三菱レイヨン株式会社 | 対向ベルト式連続製板方法 |
US4415509A (en) * | 1981-07-07 | 1983-11-15 | Mitsubishi Rayon Company, Ltd. | Acrylic laminated diffuser panel having high light-diffusing property and process for preparing same |
US4626187A (en) * | 1983-06-29 | 1986-12-02 | Mitsubishi Rayon Company Ltd. | Apparatus for preparing a synthetic resin plate of different colors |
US4839125A (en) * | 1986-05-16 | 1989-06-13 | Mitsubishi Rayon Co., Ltd. | Process for preparation of light-diffusing methacrylic resin plates |
JP2561576B2 (ja) * | 1991-06-18 | 1996-12-11 | 株式会社クボタ | 熱硬化性樹脂発泡板の製造装置 |
JPH07137054A (ja) * | 1993-11-17 | 1995-05-30 | Sekisui Chem Co Ltd | 長尺成形体の製造方法 |
JPH08300382A (ja) * | 1995-05-08 | 1996-11-19 | Teijin Ltd | サンドイッチ構造を有する複合成形品の製造方法 |
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