JP5207410B2 - How to recycle automotive glass - Google Patents

Description

  The present invention relates to a method for reusing laminated glass and tempered glass used in automobile windows.

  Laminated glass and tempered glass are mainly used as the glass used for automobile windows. Laminated glass is a laminated sheet glass composed of a glass and a thermoplastic polymer film layer that is an intermediate layer thereof. In order to reuse the laminated glass, it was necessary to separate the glass and the film.

  There are various methods for separating glass and film, but depending on the separation method, only glass can be reused or both glass and film can be reused, but there are only very expensive methods.

  Examples of the separation method include immersing a glass piece in an organic solvent, taking out the glass piece from the organic solvent, taking out the resin from the solution in which the film is dissolved, and reusing the glass and the film, respectively.

  As a method of reusing laminated glass without separating, a method used for mixing paving asphalt is used.

  Conventional reuse of laminated glass has the problem that it costs money to separate the glass and film, and the problem that the range of use is very limited to use without separation.

  In order to solve the above problems, the present invention aims to provide a method for reusing waste laminated glass in various applications without separating laminated glass into glass and film. The purpose is to provide a reuse method.

  The method of reusing automotive glass of the present invention is to heat and stir a glass piece obtained by crushing a laminated glass composed of glass and a thermoplastic polymer film, and to soften or pour point temperature of the thermoplastic polymer film. It is characterized in that a solid product is produced by giving a heat history that reaches the temperature of the product, followed by compression molding or assembly molding, and then cooling and bonding.

  In the method for reusing automotive glass of the present invention, the glass pieces are coarse particles having a particle diameter of 6 mm ± 5 mm and / or fine particles having a particle diameter of 0.5 μm to 1 mm. Is preferred.

  Furthermore, it is preferable to add a thermoplastic polymer during the heating and stirring.

  Moreover, it is preferable to coat a photocatalyst on the surface of the solid product.

  The glass recycling method of the present invention comprises a glass piece obtained by crushing a laminated glass composed of glass and a thermoplastic polymer film, and one or more inorganic substances with a water-soluble organic or inorganic gelling agent. It is added as a water-soluble binder and heated and stirred to give a thermal history that reaches the softening temperature or pour point temperature of the thermoplastic polymer film, and after compression molding or assembly molding, it is cooled and bonded to produce a solid product, Water is added to the solid product to melt the water-soluble binder, the binding force of the solid product is released, and artificial soil is produced.

  The inorganic substance is preferably selected from sand and diatomaceous earth.

  In addition, the method for reusing automotive glass according to the present invention includes a glass piece obtained by crushing tempered glass for automobile obtained by heating glass at high temperature, a crushed piece of crosslinked silicone, and a novel silicone and crosslinked A solid molded product having viscoelastic properties is produced by mixing a compound containing an agent and heat molding.

  Mixing 20 to 100 parts by weight of a crushed piece of crosslinked silicone having a particle size of 5 mm ± 4 mm and 5 to 50 parts by weight of a novel silicone + crosslinking agent with respect to 100 parts by weight of the glass piece. preferable.

  The method for recycling automotive glass according to the present invention is to produce a solid product composed of a layer of a solid product composed of a glass piece obtained by crushing the above-mentioned automotive glass and a layer composed of a crosslinked silicone piece. Features.

  The method of reusing automotive glass of the present invention is to heat and stir a glass piece obtained by crushing a laminated glass composed of glass and a thermoplastic polymer film, and to soften or pour point temperature of the thermoplastic polymer film. It is possible to reuse laminated glass in a simpler and less costly manner by producing a solid product by giving a thermal history that reaches a maximum of, then compression molding or collective molding, and then cooling and bonding. .

  When the glass piece is composed of coarse particles having a particle diameter of 6 mm ± 5 mm and / or fine particles having a particle diameter of 0.5 μm or more and 1 mm or less, the flexibility can be further adjusted.

  By adding a thermoplastic polymer during the heating and stirring, the coating thickness of the glass piece by the polymer can be controlled, and the bonding strength, physical strength and viscoelasticity of the solid product can be adjusted.

Further, by coating the surface of the solid product with a photocatalyst, the solid product can have a NO _x and SO ₂ decomposition function.

  The glass recycling method of the present invention comprises a glass piece obtained by crushing a laminated glass composed of glass and a thermoplastic polymer film, and one or more inorganic substances with a water-soluble organic or inorganic gelling agent. It is added as a water-soluble binder and heated and stirred to give a thermal history that reaches the softening temperature or pour point temperature of the thermoplastic polymer film, and after compression molding or assembly molding, it is cooled and bonded to produce a solid product, Water is added to the solid product to melt the water-soluble binder, the binding force of the solid product is released, and artificial soil is produced, so that in the state of the solid product initially obtained, storage, transportation, etc. Then, by releasing the binding force, it is possible to produce artificial soil that can provide an environment suitable for germination and growth of plant seeds.

  By selecting sand or diatomaceous earth as the inorganic substance, an artificial soil having properties more similar to natural soil can be realized.

  Further, the method for reusing automotive glass of the present invention comprises mixing a glass piece obtained by crushing tempered glass for automobile, a crushed piece of crosslinked silicone, a compound containing a novel silicone and a crosslinking agent, and heating. By producing a solid molded product having viscoelastic properties by molding, low-cost elastic glass can be obtained.

  By mixing 20 to 100 parts by weight of a crushed piece of crosslinked silicone having a particle diameter of 5 mm ± 4 mm and 5 to 50 parts by weight of a novel silicone + crosslinking agent with respect to 100 parts by weight of the glass piece. It is possible to obtain elastic glass that is more resistant to bending.

  The method for reusing automotive glass according to the present invention is to produce a solid product composed of a layer of a solid product composed of a glass piece obtained by crushing the above-mentioned automotive glass and a layer composed of a crosslinked silicone piece. It is harmless to humans and has flame retardant or non-flammable properties, and can also be used for desertification prevention mats and hydroponic cultivation equipment.

It is a figure which shows the manufacturing process of the solid product of Example 1 of this invention. It is a schematic sectional drawing of the structure of the solid product which has a photocatalyst layer of Example 2 of this invention. It is a schematic sectional drawing of the structure of the solid product which has a layer of a titanium particle on the surface of Example 3 of this invention. It is a schematic sectional drawing of the building rooftop greening construction example using the artificial soil of Example 4 of this invention. It is the schematic which shows the structure of the elastic glass of Example 5 of this invention. It is a figure which shows the cross section of the solid product which has a layer which consists of a silicone piece of Example 6 of this invention. It is the schematic which shows the cross section of the artificial soil of Example 7 of this invention.

  Below, the Example of the reuse method of the glass for motor vehicles of this invention is described using figures.

  In this example, a glass recycling method for producing a solid product from laminated glass for automobiles will be described. FIG. 1 shows a production process of a solid product.

  The used laminated glass for automobiles is crushed, and a glass piece 3 having a particle diameter of 3 to 5 mm is taken out and stirred.

  The thermoplastic polymer film used as an intermediate layer of laminated glass for automobiles is mainly made of polyvinyl butyral (PVB) or polyvinyl alcohol (PVA). In this embodiment, polyvinyl butyral (PVB) ) Is added when the glass piece 3 is heated and stirred.

The glass piece and the polyvinyl butyral are superheated with the following composition.
Glass piece (particle size distribution 3 to 5 mm): 100 parts by weight PVB 20% solution: 40 parts by weight

  The glass piece 3 and PVB 4 are heated by the burner 2 while stirring the stirrer 1 with the above composition. When the heating temperature reaches 160 ° C., the PVB contained in the glass piece 3 is melted, and the newly added PVB is melted. The aggregate 5 of the glass pieces 3 whose surface is coated with PVB4. It becomes.

  The aggregate 5 of glass pieces 3 coated with PVB 4 is loaded into a rubber container 6 and cooled. As a result, the solid product 7 can be obtained by cooling bonding.

  Here, the recycling method of the glass for motor vehicles which manufactures the solid product which has a photocatalyst layer on the surface using the solid product obtained in Example 1 is demonstrated.

As shown in FIG. 2, an adhesive layer 8 is applied to the surface of the solid product 7 obtained in Example 1, and titanium oxide 9 (anatase type / rutile type) is sprayed on the adhesive layer 8 as a photocatalyst. Titanium oxide 9 can add NO _x and SO ₂ decomposition functions to the solid product 7.

  As the adhesive layer 8, PVB, PVA and thermoplastic resin (hot melt type), as well as emulsion latex and the like are suitable. In particular, from the viewpoint of weather resistance and durability, condensation type and addition type transparent liquid silicone In this example, as the material of the adhesive layer 8, a compact silicone TSE3946 made by Toshiba Silicone Co., Ltd. was used, and thereby flame retardancy standard UL94V-1 could be obtained.

  This example describes a method for reusing automotive glass, in which the surface of the solid product 7 obtained in Example 1 is coated with a photocatalyst without using the adhesive layer 8 used in Example 2. .

  First, 100 parts by weight of a glass piece and 0 to 30 parts by weight of a thermoplastic resin are heated to 160 ° C. while stirring with a stirrer. When heated to 160 ° C., 5 to 30 parts by weight of titanium oxide is added, and the mixture is further cooled with stirring. Then, a glass piece (titanium particles) 10 whose surface is coated with titanium is obtained.

Next, the surface of the solid product 7 obtained in Example 1 is heated to a softening region of 600 ° C. using a burner. The glass pieces (titanium particles) 10 are dispersed on the surface of the solid product 7 heated to the softening region. Thus, the photocatalyst is exposed on the surface of the solid product 7 (see FIG. 3), and the area of the NO _x and SO ₂ decomposition function can be largely secured and added to the solid product 7.

  In this example, a method for reusing automotive glass, in which artificial soil is produced using laminated glass for automobiles, will be described.

  The main component of glass for automobiles is sodium silicate, which is the same as the main component silicic acid of natural soil, so the crushed glass pieces have properties similar to pebbles, gravel and sand, depending on their particle size. Have. Utilizing this property, by adding diatomaceous earth (microporous structure) to the glass piece, it has water permeability and water retention, and by adding clay to the glass piece, it is modified to clay, sawdust, By adding rice husk or hay, it becomes porous and functions as a fertilizer, so that it can be used as artificial soil.

In addition, a chemical fertilizer is appropriately combined with powders containing SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , and Mg (OH) ₂ mainly composed of calcium carbonate or magnesium carbonate made of limestone and cucumber. Combined with the seeds, the properties of artificial soil are strengthened.

  Here, a specific method for producing artificial soil will be described. Add 50 parts by weight of glass pieces, 30 parts by weight of diatomaceous earth, 20 parts by weight of sand, add 20 parts by weight of 30% agar solution, which is a water-soluble binder, and load it into an aluminum tray. In addition, it is then cooled to obtain a solid product. After 24 hours, when the solid product is sprinkled with water, the binder gradually dissolves. The binder is almost dissolved by the watering of a total of nine times, the solid matter is released, and non-solid artificial soil can be obtained.

  The artificial soil of this example is convenient for storage, transportation and movement when in the state of the solid product, and the binder is dissolved by watering after construction and the bond is released, so that the artificial soil Since an environment for seed germination and growth can be secured, an artificial soil optimal for building rooftop greening can be realized.

  An example of building rooftop greening using the artificial soil of this example will be described.

  FIG. 4 shows a cross-sectional view of a building rooftop greening construction example using the artificial soil of this embodiment.

The tray used for the greening of the roof is required to be lighter in consideration of the durable weight limit (180 kg / m ₂ ) on the roof, so the cork tray 11 is used in this construction example. The cork tray 11 is made of a cork waste material using a binder (syndiotack 1,2-polybutadiene) and has a heat insulating effect and a buffering effect. The tray 11 is provided with a water passage hole 12 for water passage.

  In the tray, the glass piece layer 13, the artificial soil 14, and the seedling 15 are stacked in order from the bottom.

  The lowermost glass piece layer 13 is obtained by adding polyvinyl alcohol to a glass piece, heating and stirring, and then cooling and forming, and the procedure is the same as in Example 1. Moreover, this glass piece layer 13 consists of two layers, the lower layer is comprised with the glass piece with a particle size of 5-10 mm, and the upper layer is comprised with the glass piece with a particle size of 3-5 mm.

  The second artificial soil 14 from the bottom is a glass piece having a particle size of 1 mm or less, sand, diatomaceous earth added with agar as a binder, heated and then cooled, and then the binding force is released by watering. Is.

  At the top, sand moss is bonded as a seedling 15 onto the artificial soil 14 using rice paste that does not inhibit the growth.

With the above configuration, the weight reduction (40 kg / m ₂ ) and the ease of maintenance required for building rooftop greening can be realized.

  In this example, a method for reusing tempered glass for automobiles will be described.

  Unlike laminated glass, automotive tempered glass does not contain a thermoplastic polymer film, and even if silicone is used as a binder, it does not contain any factors (organic matter) that inhibit the crosslinking reaction of silicone. Bonding is brought about. This makes it possible to produce elastic glass from tempered glass for automobiles using silicone as the binder.

50 parts by weight of a crushed silicone product 18 having a particle size of 5 mm ± 4 mm obtained by crushing a crosslinked silicone product is mixed with 100 parts by weight of tempered glass piece 17 for an automobile, and a new silicone and a crosslinking agent are used as a binder. Add 10 parts by weight of compound 19 containing.

  The above mixture is loaded into a 300 × 300 × 20 mm mold and press molded at a temperature of 180 ° C. for 15 minutes. Thereafter, secondary crosslinking is performed for 8 hours in an atmosphere at a temperature of 200 ° C. using a hot air dryer to obtain an elastic glass 16 having a structure shown in FIG.

When the properties of the elastic glass 16 of this example were confirmed by experiments, it was found that it was possible to withstand a bending angle of 20 degrees, and the compressive strain rate at a load of 20 MPa was 15 % from the following formula.
Compressive strain rate = [20 mm (thickness when no test piece is loaded) −17 mm (thickness when the load is 20 MPa)] / 20 mm (thickness when the test piece is not loaded) × 100 = 15 %

  In this example, the mixture used in Example 5 (50 parts by weight of a crushed silicone product obtained by crushing a crosslinked silicone product was mixed with 100 parts by weight of a tempered glass piece for automobiles, and a new silicone and a crosslinking agent were used as a binder. The invention relates to a method for recycling automobile glass, which uses a compound containing 10 parts by weight of a compound to obtain a solid product having a layer of crosslinked silicone pieces.

  100 parts by weight of crushed silicone, 20 parts by weight of millable silicone rubber TSE-270-5U (manufactured by Toshiba Silicone Co., Ltd.), 0.4 weight of 2,5-dimethyl-2,5 di (tert-butylperoxin) hexane And 5 parts by weight of the valve stem are kneaded with a kneader so that the silicone crushed pieces are included in the petrol (brown) -colored millable silicone rubber.

  200 × 300 × 12 mm was charged with 200 g of the kneaded composition of the above-mentioned silicone crushed pieces, spread evenly on the bottom of the mold, and the mixture used in Example 5 (reinforced glass pieces for automobiles). 50 parts by weight of a crushed silicone product obtained by crushing a crosslinked silicone product is mixed with 100 parts by weight, and 10 parts by weight of a compound containing a novel silicone and a crosslinking agent is added as a binder). Furthermore, 200 g of the kneaded composition of the silicone crushed pieces was charged as the upper layer portion, and press molding was performed at a pressure of 50 kg / cm 2 and a temperature of 170 ° C. for 10 minutes. As a result, an elastic mat 22 having a three-layer structure composed of two pieces of a silicone fragment piece 20 and one piece of a glass piece 21 as shown in FIG.

  In this example, the mixture of Example 5 was used, but it is also possible to use the mixture used in other examples. Further, in this embodiment, a three-layer structure is used, but a two-layer structure shown in FIG. 6B may be used, and a structure in which a layer made of silicone crushed pieces as shown in FIG. Is possible.

  In the present embodiment, another embodiment of the artificial soil using a fragment of automobile glass will be described.

  Solid or solid mixture of crude glass pieces and fine glass pieces obtained by crushing automobile glass, compost or chemical fertilizer such as sand, diatomaceous earth, sawdust or hay, natural soil, water retention agent, water-soluble gelling agent Man-made soil 26 is manufactured in a state where it is not converted, and loaded into a container 23 shown in FIG.

  The container has a drain groove 24 for drainage and a germination hole 25 for plants, and is preferably made of a material containing rubber or cork.

  When the above mixture is not solidified, it is necessary to close the opening of the container with a film such as wafer after loading the mixture into the container for transportation and storage. When seeds are loaded at the same time, it is necessary to shield the sunlight during storage by using a black or red film as the film.

  The kind of each material of the said mixture, a combination ratio, etc. can be adjusted arbitrarily, and various combinations are possible in order to satisfy | fill the property required for artificial soil.

  The conditions described in each example are merely examples, and it goes without saying that various changes and improvements within the scope of the present invention are possible.

1 Stirrer 2 Burner 3 Glass piece 4 PVB
5 Aggregate 6 Rubber container 7 Solid product 8 Adhesive layer 9 Titanium oxide 10 Glass piece (titanium particles)
DESCRIPTION OF SYMBOLS 11 Tray 12 Water flow hole 13 Glass piece solid product 14 Artificial soil 15 Seedling 16 Elastic glass 17 Glass piece 18 Silicone crush piece 19 Compound 20 Silicone crush piece layer 21 Glass piece layer 22 Elastic mat 23 Container 24 Drainage groove 25 Germination hole 26 Artificial soil

Claims (3)

  By mixing and heat-molding a glass piece obtained by crushing tempered glass for automobiles obtained by heating glass at a high temperature, a crushed piece of crosslinked silicone, and a compound containing a novel silicone and a crosslinking agent A method for reusing automotive glass, characterized by producing a solid molded product having viscoelastic properties.   Mixing 20 to 100 parts by weight of a crushed piece of crosslinked silicone having a particle diameter of 5 mm ± 4 mm and 5 to 50 parts by weight of a novel silicone + crosslinking agent with respect to 100 parts by weight of the glass piece. The method for recycling glass for automobiles according to claim 1, wherein   It produces a solid product composed of a layer of a solid product composed of a glass piece crushed from the glass for automobiles described in claim 1 or 2, and a layer composed of a crosslinked silicone piece, How to reuse automotive glass.