JP5092620B2 - Processing method of used chip type electronic component packing material - Google Patents

Description

The present invention relates to a method for treating a used chip-type electronic component packaging material, and more specifically, separates pulp used as a raw material for paper and plastic used as thermal energy from a used chip-type electronic component packaging material (carrier tape). The present invention relates to a processing method for used chip-type electronic component packing materials.

There is a chip-type electronic component packaging material that is currently disposed of as industrial waste or is incinerated while recycling / reuse is required. Chip-type electronic component packing materials include trays for aligning parts in a matrix, magazine tubes for aligning parts in a cylinder, bulks for enclosing parts in bags or boxes, and individual parts individually. There are carrier tapes that roll a continuous tape. The trays are reused due to standardization and standardization. The movement of magazine tubes is also progressing, and the results of industrial waste reduction have been achieved.

Among chip-type electronic component packaging materials, carrier tapes are used in large quantities as chip-type electronic component packaging materials that are the most excellent in terms of facility compatibility, diversification, workability, reliability, and space saving. The carrier tape is made of paper, plastic, or the like, and is composed of a tape-like substrate having a width of about 8 mm having a cavity for storing chip-type electronic components and a cover tape for closing the cavity. As a usage method, a carrier tape is wound into a tape reel, and the tape reel is loaded into an electronic component automatic mounting device (mounter). Then, the carrier tape is pulled out from the tape reel, and when the carrier tape is sent to a predetermined position of the electronic component mounting device, the cover tape is peeled off, and the machine hand of the electronic component automatic mounting device is in the cavity formed in the carrier tape. The component is held and taken out from the carrier tape, and the electronic component is mounted at a predetermined position on the circuit board. The used carrier tape from which the electronic components have been removed is discharged from the discharge port of the electronic component automatic mounting device, and the discharged carrier tape can be cut appropriately by the operator or automatically to an appropriate length. It is cut and treated as waste.

There are two types of used carrier tape: the type that the operator cuts appropriately and the type that the machine automatically cuts at the discharge port.In the former case, the used carrier tape is cut in a relatively long unit (long). In the latter case, it is cut into a short length of several millimeters to several centimeters and deposited in a box separately installed through the electronic component automatic mounting device or through a suction hose for collecting dust. Is done.

In any of the above two types of cut lengths, both paper and plastic ones are used depending on the chip-type electronic components used, and most of them can only be collected in a mixed state. At present, it is treated as industrial waste. Also for paper carrier tapes, a thin plastic film called a bottom tape (mainly polyethylene film) is heat-sealed on the back side of the punched type (punched product) when making the cavity. Cavities for storing parts were formed, and it was difficult to obtain waste paper pulp more than the processing of general laminated waste paper.

Another challenge when reclaiming pulp from used carrier tapes that are a mixture of paper and plastic is the high proportion of plastic. The ratio of paper and plastic is characterized by the fact that a lot of plastic embossing is used when the electronic parts are relatively large, and a lot of paper is used when the electronic parts are relatively small. About 40% to 60% of plastic is mixed, which is a factor that hinders pulp recovery.

In Japanese Patent Laid-Open No. 2006-314912 (see Patent Document 1), a cut piece of a carrier tape is separated into a plastic one and a paper one using a vibration sorter and a wind sorter and used as a reusable valuable material. A method is disclosed. However, this method requires large-scale equipment, and is a mechanism that separates according to the difference in specific gravity. Therefore, it is difficult to accurately separate paper and plastic having similar specific gravity. In addition, as a method for effectively using the used carrier tape, Japanese Patent Application No. 2007-31767 (see Patent Document 2) includes a used carrier tape that has been subjected to industrial waste treatment, and boiler combustion ash that has also been subjected to industrial waste treatment. A method is described in which the boiler combustion ash can be effectively used again as a fuel by mixing in the boiler. In addition, Japanese Patent Application No. 2007-83810 (see Patent Document 3) describes wastewater treatment plants and paper mills that are expensive to process due to their high moisture content, or that have been treated for industrial waste. A method of thermal recycling as boiler fuel is described by reducing the moisture in the sludge by mixing with sludge-like insoluble material (sludge) generated by the above. These are effective in reducing the environmental burden by effectively using the used carrier tape that is currently being disposed of as waste and combining it with other waste that is also being disposed of as waste. However, it is desired that the paper portion of the used carrier tape be used as recycled paper if possible.
JP 2006-314912 A Japanese Patent Application No. 2007-31767 Japanese Patent Application No. 2007-83810

At present, chip-type electronic component packaging materials that are disposed of as industrial waste or disposed of by incineration are efficiently divided into paper and plastic parts. The part is used as fuel and provides a way to effectively use it as thermal energy.

In view of the above problems, the present inventors have found a method for efficiently separating a used chip-type electronic component packaging material that is discarded as waste without being effectively used into a pulp portion and a plastic portion. The present invention has been completed. The present invention includes the following inventions.
(1) Used chip-type electronics that separates the used chip-type electronic component packing material into water, separates pulp and plastic with a screen, regenerates pulp as paper, burns plastic, and collects it as thermal energy Processing method of parts packing material.
(2) A used chip-type electronic component packing material is disaggregated under conditions of a solid content concentration of 5% to 30% and a temperature of 50 ° C. or higher and lower than 70 ° C., and a slit having a slit width of 0.05 to 0.3 mm. The processing method of the used chip-type electronic component packaging material according to (1), wherein the pulp is obtained by passing through a screen.
(3) Immediately after disassembling the used chip-type electronic component packing material, after passing a round hole screen having a hole diameter of 1.0 to 5.0 mm, it passes through a slit screen having a slit width of 0.05 to 0.3 mm. The processing method of the used chip-type electronic component packing material as described in (1) or (2) which obtains a pulp.
(4) The used chip-type electronic component packaging material according to any one of (1) to (3), wherein the used chip-type electronic component packaging material is disaggregated at a high concentration of 15% to 30%. .
(5) The used chip type electronic component packaging material according to any one of (1) to (4), wherein the used chip component packaging material is shredded and crushed into a size of 500 mm or less in length. Processing method.

Chip-type electronic parts packaging materials that are currently disposed of as industrial waste or are incinerated while recycling / reuse is required are recycled as recycled paper for the pulp part, and thermal recycled for the plastic part. It becomes possible to do.

Among the used chip-type electronic component packing materials, what is called a carrier tape is made of paper or plastic depending on the size and application of the chip-type electronic component. The amount of chip-type electronic component packaging used is very large and occurs in large quantities, but both paper and plastic are mixed and difficult to collect individually and are treated as industrial waste There is only the situation.
For plastics other than paper, the raw materials are polyethylene terephthalate, polyethylene, polypropylene, polystyrene, polyphenylene ether, polyamide, polyurethane, acrylonitrile / butadiene / styrene, polycarbonate, polyester sulfone, phenol formaldehyde, polysulfone, polyphenylene sulfide, styrene butadiene rubber, Polyvinyl chloride, polyvinylidene chloride, and the like can be used. Among them, polyethylene terephthalate, polystyrene, polycarbonate, polypropylene, and the like are mainly used. Since these emit a heat amount of 4500 kcal / kg or more during combustion, the plastic after separation from the pulp fiber can be recovered as thermal energy by using the fuel of the heat recovery boiler.

In the present invention, the used chip-type electronic component packing material is disaggregated in water with paper and plastic mixed, and the pulp and plastic are separated with a screen. The pulp is used as recycled paper, and the separated plastic is burned. And recovered as thermal energy.

In the present invention, when the used chip-type electronic component packaging material is disaggregated, the disaggregation is performed under conditions of a solid content concentration of 5 to 30% and a temperature of 50 ° C. or higher and lower than 70 ° C. It is preferable to treat with a slit type screen of 05 to 0.3 mm. The reason for this is that the used carrier tape of the type automatically cut contains paper tape and plastic tape having a length of about 2 mm. There is no particular problem with used carrier tapes obtained by crushing long products. Since the plastic tape, that is, the plastic embossing has a certain thickness, it can be removed relatively easily with a slit-type screen at a later stage, but the bottom tape that is heat-sealed on the back surface of the paper carrier tape is usually 15 to Since it is a tape made of polyethylene with a thickness of about 50 μm, if it is a few millimeters long and it is processed under normal conditions with a slit screen in the subsequent process, it will be accepted if the slit is pulled out in the thickness direction. Will flow to the side. However, in the present invention, since a temperature of 50 ° C. or higher and lower than 70 ° C. is applied by the pulper, the polyethylene film is deformed and is difficult to pass through the screen slit at the subsequent stage.
In the present invention, the solid content concentration during disaggregation is preferably 5 to 30% by mass. If it is less than 5%, the amount of energy consumed is increased when the temperature is applied, which is not economical, and if it is 30% or more, a load is excessively applied when the pulper is stirred, and this is not preferable. Among these, disaggregation at a solid content concentration of 15 to 30% is more preferable in terms of energy and efficiency of disaggregation.

The pulper used for disaggregation in the present invention is not particularly limited as long as it is usually used in the paper industry, but it has a low concentration (6% or less), a medium concentration (6-10%), and a high concentration (10%). ~ 30%), batch or continuous pulpers can be used. More specifically, low concentration pulper, high concentration pulper, drum pulper, etc. can be used. Low concentration pulper includes hydra pulper, rotor pulper, horizontal pulper, etc., and high concentration pulper includes helicopter rotor, kneading. Examples include, but are not limited to, a pulper.

In the present invention, the pulp-containing slurry that has been disaggregated at a temperature of 50 ° C. or higher and lower than 70 ° C. is diluted, the pulp is taken out by a screen, and the film is removed. As the slit screen, a slit screen for a selection process that is usually used in the paper industry can be used, and the slit width is preferably in the range of 0.05 to 0.30 mm. If it is narrower than 0.05 mm, the probability that the film will pass will be small, but the pulp will be difficult to pass and the throughput will not increase. On the other hand, if it is larger than 0.30 mm, the film is easy to pass.

In the present invention, it is preferable to pass a round hole screen having a hole diameter of 1.0 to 5.0 mm immediately after the used electronic component packing material is disaggregated. The proportion of plastic embossment in the used carrier tape varies depending on the mounting machine (mounter), but on average it is about 40% to 60%, and it is roughly selected with a round hole screen with a hole diameter of 1.0 to 5.0mm. It is possible to remove 90% or more of the plastic in the slurry by performing the screen processing for the purpose. As a result, the slit width in the subsequent stage is in the range of 0.05 to 0.30 mm. In slit screen processing, it is possible to avoid the trouble of clogging the slit due to the film adhering to the screen basket, and efficiently separate pulp and plastic. It becomes possible to do.

Although it does not necessarily limit in this invention, since it can deform | transform a film further when a mechanical shear force is applied at the time of disaggregation or after disaggregation, it is preferable. Specifically, a screw-type single screw mixer or a twin screw mixer, a disperser, a kneader, a mica processor, or the like can be used. The pulp slurry is passed through these devices under conditions such that the temperature is 50 ° C. or higher and lower than 70 ° C., and mechanical shearing force is applied while the film is softened. Thereby, the film is not in a flat state but in a curled state and does not pass through the subsequent screen. If a kneading pulper is used as a disaggregator, the disaggregation process and the process of applying a shearing force can be performed simultaneously while applying temperature, which is efficient.

In the present invention, it is preferable that the used carrier tape is fragmented, and it is particularly preferable to chop or crush in advance to a size of 500 mm or less. The used carrier tape to be treated according to the present invention can be any of the above-mentioned long type and the type automatically cut finely. In such a case, it is preferable to chop or crush it to a length of 500 mm or less because it can be prevented from becoming tangled in the disaggregator and becoming difficult to disaggregate. There is no limitation on the crushing method, and crushers generally used for waste treatment can be used. Specifically, crushing can be performed using a uniaxial crusher, a biaxial crusher, or the like. . As other methods for shredding, a paper shredder or a cutting machine for making paper or plastics fine can be used, but it is not particularly limited as long as it can be shredded to a size of about several tens of centimeters. Absent. On the other hand, as long as a long product is not mixed, the cut product can be used as it is without being fragmented.

The pulp obtained by the present invention has a high whiteness because the pulp used as a raw material for the paper carrier tape has a high content of hardwood- and softwood-bleached kraft pulp. Since there is no need for deinking and there is little decrease in strength because it does not go through the printing process, it can be recycled into paper for various uses, either alone or mixed with other pulp. Other pulps include, for example, unbleached, bleached chemical pulp, cotton pulp, linter pulp, GP (ground pulp), TMP (obtained by kraft pulping, sulfite pulping, alkali pulping of conifers and hardwoods. Thermo-mechanical pulp), etc., and used paper pulp. As used paper pulp, it is prepared from upper white / card, extra white / middle white / white Manila, imitation / color, newspaper, magazine, cut / medium anti-old, tea imitation, corrugated cardboard, mount / tail, ball, etc. The used pulp can be used, but is not limited to waste paper used with the present invention. These waste papers may be used as they are after the disaggregation and dust removal treatments, but can be used as waste paper pulp after passing through the steps of deinking, bleaching, ink dispersion, washing, etc., if necessary.

In the slurry composition containing the pulp obtained in the present invention, a paper strength enhancer, a water-resistant agent, a water-repellent agent, a foamable microcapsule, a sizing agent, a dye, and a yield improver are appropriately added as necessary. , Fillers, pH adjusters, slime control agents, thickeners, antiseptics, fungicides, antibacterial agents, flame retardants, antiseptics, rodenticides, insecticides, moisturizers, freshness-retaining agents, oxygen scavengers, microcapsules, A foaming agent, surfactant, electromagnetic shielding material, antistatic agent, rust preventive agent, fragrance, deodorant and the like can be selected and blended. These can be used in combination.

The pulp obtained according to the present invention can, of course, be made into recycled paper by hand-drawing, but is usually made by a paper machine equipped with one or more wire parts. Examples of the wire type include a circular net type, a short net type, a long net type, an inclined type, and a twin wire type. The pulp obtained in the present invention can also be used in a multi-stage paper machine used for making two or more layers of cardboard, such as paperboard, liner and core. As a drying method, a method generally used for papermaking, for example, a Yankee dryer or a multi-cylinder dryer can be used.

If necessary, the recycled paper can be coated with a surface treatment agent or a pigment coating composition on the front surface or the back surface. There are no particular restrictions on the surface treatment agent, pigment composition, and coating amount.

On the other hand, the plastic portion in the used carrier tape can be separated and recovered as a reject that cannot pass through the screen holes in the above-described process of separating the pulp fibers from the used carrier tape. As a specific example, in the disaggregation process, when the low-concentration pulper is disaggregated, those that do not disintegrate into water continuously are collected. Drum pulpers such as vibrating screens and Jansson screens after dilution can directly discharge soot from the side opposite to the used paper supply side. In the subsequent dust removal process, it can be separated and recovered as each reject of a machine such as a high concentration cleaner, a low concentration cleaner, a coarse selection screen, a fine selection screen, a reject separator, a slash separator, an SS separator, and a double separator. In addition, when a screen is installed in the raw material line just before papermaking, it can be separated and recovered as a reject of the screen.

As described above, the separated and recovered plastic part is, of course, separated and recovered not only with plastic but also with undissolved pulp fibers that could not be disaggregated into water, but because it contains a lot of water, It is desirable to perform a dehydration process before supply. Specific examples include a drum-type dehydrator, a screw press, a cylinder press, a suction press, a drum extract, a filter press, a disk filter, an SP filter, and the like, but are not limited thereto.

Although there will be no restriction | limiting in particular if it is a combustion apparatus which can burn solid fuel about the apparatus to burn, ie, a boiler, It is preferable to burn at a combustion temperature of 800 to 1,100 degreeC. If it is less than 800 degreeC, since generation | occurrence | production of a dioxin etc. is anxious as generally known, it is unpreferable. Further, even if the temperature is 1,100 ° C. or higher, energy is wasted and the furnace is not preferable because it is easily painful. In addition, it is preferable in consideration of the environment that the incinerated ash after combustion removes and seals harmful substances and reuses it as a cement material, a soil improvement material, or the like.
According to the present invention, the plastic in the used carrier tape is thermally recycled.

The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto.
Example 1
300 kg of used carrier tape long product made of paper and plastic emboss was prepared. The ratio of paper and plastic was 6: 4 by mass. Moreover, the kind of resin contained in this used carrier tape was polyethylene terephthalate, polystyrene, polycarbonate, and polyethylene. What was crushed into small pieces with an average of about 30 cm by crushing with a biaxial crusher was put into a kneading pulper (manufactured by Nippon Vehicle Manufacturing Co., Ltd., model: KNP-10 type) and diluted with water to obtain a solid content concentration (mass) At the same time as 20%, steam was added, and the temperature during disaggregation was 67 ° C. Dissolved sample came out from the take-out screw at the bottom of the pulper 30 minutes after the injection, and this was diluted with water and diluted to a solid content concentration of 1.5%, and then put into a vibrating screen with a 5mmφ round hole. Was stored in the raw material tank. The accept raw material was passed through a screen having a 0.25 mm slit basket to obtain a slit screen accept raw material. The amount of plastic contained in 100 g of this dry raw material was measured and found to be 0 g. This accept raw material was used as the raw material for the second layer (bottom) of the white liner five-layer paper making machine, and a white liner was made.
On the other hand, those rejected by the vibrating screen after disassembling the kneading pulper and those rejected by the slit screen were mainly plastic embossed or bottom tape, and were deformed by heat. These were dehydrated to a solid concentration of about 20% with a screw type dehydrator, then supplied to the boiler as fuel and recovered as thermal energy.

Example 2
300 kg of used carrier tape cut products made of paper and plastic embossing were prepared. The ratio of paper and plastic was 6: 4 by mass. The types of resin were polyethylene terephthalate, polystyrene, polycarbonate, and polyethylene. Although it applied to the biaxial crusher, there was no change in shape, and it was put into a kneading pulper (manufactured by Nippon Vehicle Manufacturing Co., Ltd., model: KNP-10 type) and diluted with water to obtain a solid content concentration (mass) of 20%. Steam was added and the disaggregation temperature was 67 ° C. Dissolved sample came out from the take-out screw at the bottom of the pulper 30 minutes after the injection, and this was diluted with water and diluted to a solid content concentration of 1.5%, and then put into a vibrating screen with a 5mmφ round hole. Was stored in the raw material tank. The accept raw material was passed through a screen having a 0.15 mm slit basket to obtain an accept raw material. The amount of plastic contained in 100 g of this dry raw material was measured and found to be 0 g. The accept raw material was used as a solid content for 10% of the raw material of the core base paper single layer paper making machine to make the core base paper, but it could be made without any particular problem.
On the other hand, those rejected by the vibrating screen after disassembling the kneading pulper and those rejected by the slit screen were mainly plastic embossed or bottom tape, and were deformed by heat. These were dehydrated to a solid concentration of about 20% with a screw type dehydrator, then supplied to the boiler as fuel and recovered as thermal energy.

Comparative Example 1
300 kg of used carrier tape cut products made of paper and plastic embossing were prepared. The ratio of paper and plastic was 6: 4 by mass. The types of resin were polyethylene terephthalate, polystyrene, polycarbonate, and polyethylene. Although it applied to the biaxial crusher, there was no change in shape, and it was put into a kneading pulper (manufactured by Nippon Vehicle Manufacturing Co., Ltd., model: KNP-10 type) and diluted with water to obtain a solid content concentration (mass) of 20%. Steam was added and the disaggregation temperature was 45 ° C. Dissolved sample came out from the take-out screw at the bottom of the pulper 30 minutes after the injection, and this was diluted with water and diluted to a solid content concentration of 1.5%, and then put into a vibrating screen with a 5mmφ round hole. Was stored in the raw material tank. The accept raw material was passed through a screen having a 0.15 mm slit basket to obtain an accept raw material. The amount of plastic contained in 100 g of this dry raw material was measured and found to be 0.32 g. Since this accept raw material is mixed with plastic, it could not be used because it may be a disadvantage when used as a paper raw material.

At present, used chip-type electronic component packaging materials that are disposed of as industrial waste or disposed of by incineration are efficiently recycled from recycled pulp to recycled paper and supplied to the boiler. Thermal recycling is possible.

Claims (2)

Immediately after the used chip-type electronic component packing material is disaggregated under conditions of a solid content concentration of 15% to 30% and a temperature of 50 ° C. or higher and lower than 70 ° C., a round hole screen having a hole diameter of 1.0 to 5.0 mm is formed. And then pass through a slit screen with a slit width of 0.05 to 0.3 mm to separate the pulp and plastic, regenerate the pulp as paper, burn the plastic and recover it as thermal energy. A method of processing a used chip-type electronic component packing material, which is characterized. The processing method of used chip type electronic component packing material according to claim 1, wherein the used chip type electronic component packing material is shredded or crushed in advance to a size of 500 mm or less.