JP5936835B2 - Recycling method and sheet of vinyl chloride wallpaper and composition comprising the sheet - Google Patents

Description

The present invention relates to a vinyl chloride wallpaper recycling method, a sheet produced by a vinyl chloride wallpaper recycling method, and a structure including the sheet. More specifically, in the present invention, a surface layer material layer made of polyvinyl chloride, a surface material layer made of polyvinyl chloride of a so-called vinyl chloride wallpaper in which the backing material layer is joined and integrated, and a backing material layer, respectively. The present invention relates to a method of recycling through a predetermined process without separation, a sheet manufactured by the method, and a structure including the sheet as one of constituent materials.
The term “construction” used in the present invention is defined as tile carpet or flooring, flooring backing, sound insulation sheet, plastic pallet or the like.

  As waste materials for vinyl chloride wallpaper, “factory waste” generated in the manufacturing process, “construction waste” generated at the construction stage, and “used waste” that became unnecessary after renewal after proper construction. There is. In the present invention, these three types of waste materials are collectively referred to as “vinyl chloride wallpaper waste materials”.

The amount of waste vinyl chloride wallpaper is about 640 million m ² (about 200,000 tons) per year. Vinyl chloride wallpaper is designated as a designated display product by the “Act on Promotion of Effective Utilization of Resources” enacted in April 2001, and is required to display materials to promote separate collection. However, it is said that the recycling rate with respect to the annual recovery rate of vinyl chloride wallpaper waste is 1% or less. The main reason for this is that the mainstream of the conventional method includes a process of separating the surface material layer made of polyvinyl chloride and the backing material layer made of pulp fibers, which increases the cost of equipment and other items, and recycles it. This product was not easily developed for industrial scale use.

  As a conventional recycling method of vinyl chloride-based wallpaper waste material, a surface layer material layer made of polyvinyl chloride and a backing material layer made of pulp fiber or the like are separated and pulverized, or further heated and melted into pellets. There is. For example, Patent Document 1 describes a wallpaper layer or the like in which a vinyl backing resin is coated on a fiber backing paper base material, or a fiber layer of a work glove in which a vinyl chloride resin is applied to the surface of a cloth work gloves and a synthetic resin coating layer. In the method of separating and recovering fiber components and resin components from waste products, and recycling them as recycled raw materials, after first pulverizing, use the difference in specific gravity between vinyl chloride resin pieces and fiber pieces. The method of collecting separately by wind power through a cyclone is described.

  In addition, as in the invention described in Patent Document 1, Patent Document 2 separates and recovers a composite resin waste material containing fibers and resins from a fiber component and a resin component, and recycles them as recycled materials. In the method, a technique is described in which, after first pulverization, separation is performed using a difference in specific gravity between resin pieces and fiber pieces using a cyclone.

  Patent Document 3 describes a technique in which a vinyl chloride wallpaper resin layer is swollen with an organic solvent and separated from a fiber layer to recover a vinyl chloride resin.

  Patent Document 4 discloses a method of cutting and peeling one layer of a laminated body using a rotating body having a cutting blade.

  All of the conventional techniques described in the above-mentioned patent documents require special equipment, machines, tools, etc. developed exclusively for recycling so-called vinyl chloride wallpaper waste materials. Expensive costs are incurred, and the remanufactured products have application on an industrial scale, and are difficult to put into practical use unless the costs can be absorbed sufficiently.

JP 2007-275852 A JP 2008-213423 A JP 09-59423 A Japanese Patent Laid-Open No. 2003-88772

  As described in Patent Documents 1 to 4 described above, the recycling of the vinyl chloride wallpaper waste material is performed by separating and pulverizing the surface material layer made of polyvinyl chloride and the backing material layer made of pulp fiber, or Furthermore, there is a method of heating and melting into pellets. However, the methods described in the above-mentioned patent documents require special equipment, machines, instruments, etc. that have been specially developed. Depending on the use of the final product due to the complicated process, it may be difficult to put into practical use. For example, when vinyl chloride wallpaper waste is reused for products that require cost and simplification of the manufacturing process rather than the finished state, such as floor surface unevenness adjustment materials, base materials, and carpet back layers. This is an example.

  Therefore, the main problem to be solved by the invention is to form a vinyl chloride wallpaper waste material into a recycled sheet without separating the surface material layer made of polyvinyl chloride and the backing material layer made of pulp fibers. .

The above problems are solved by the means described in the following items.
1. The waste material of the polyvinyl chloride resin-based wallpaper in which the surface material layer and the backing material layer made of polyvinyl chloride resin are joined and integrated is cut into a predetermined size to obtain a pulverized product,
A method for recycling a vinyl chloride wallpaper, which comprises pressing a dispersion obtained by kneading the pulverized product together with a polyvinyl chloride resin modifier at high speed to form a sheet.

2. In the above item 1, acrylic-modified polytetrafluoroethylene is used as the polyvinyl chloride resin modifier.

3. The sheet manufactured in the above item 1 or 2.

4). A structure comprising the sheet according to claim 3 as one of constituent materials.

According to the invention described in claim 1, the waste material of the polyvinyl chloride resin-based wallpaper in which the surface material layer and the backing material layer made of polyvinyl chloride resin are joined and integrated into a predetermined size to obtain a pulverized product,
Since the dispersion obtained by kneading the pulverized material together with the polyvinyl chloride resin modifier at high speed is pressed to form a sheet, the surface layer layer made of polyvinyl chloride and the backing are conventionally used. Unlike the method in which the material layer is separated and pulverized, or further heated and melted into pellets, specially developed special devices, machines, tools and the like are not required. Therefore, a large amount of cost is not required for initial capital investment, maintenance cost, and the like. In addition, the recycling process is relatively simple because there is no separation process. Therefore, for example, reuse of vinyl chloride wallpaper waste material requires cost and simplification of the manufacturing process rather than the finished state, such as a floor surface unevenness adjusting material, a base material, and a carpet back layer. There is industrial applicability in the case of products.

  Furthermore, since the invention described in claim 1 includes a step of kneading the vinyl chloride resin-based wallpaper together with the polyvinyl chloride modifier at a high speed, in the subsequent step, the surface material layer made of polyvinyl chloride is efficiently melted. Thus, the backing material layer can be obtained as a kind of cellulose-based filler. The cellulose-based filler thus obtained is used as a filler for rubbers and plastics, and is a fiber floc and cottonseed made of alpha fiber element obtained by alkali-treating and mechanically crushing wood pulp. It can be made to function as a substitute for cotton liters or cotton flocks obtained from the above, or human silk flocks obtained by chopping human silk. This cellulose-based filler has effects such as improved processability, prevention of deformation / shrinkage, and improvement of hardness over polyvinyl chloride.

  According to the invention described in claim 2, by selecting acrylic modified polytetrafluoroethylene as a polyvinyl chloride modifier, the melt tension of polyvinyl chloride is increased, the flow characteristics of the resin in the molding process are improved, and molding is performed. The appearance of the product can be improved.

  According to the invention described in claim 3, a sheet as an effective utilization of used resources can be manufactured at low cost by recycling the vinyl chloride resin-based wallpaper.

  According to the invention described in claim 4, a sheet produced by recycling vinyl chloride resin-based wallpaper at low cost and as an effective use of used resources, a sheet or tile-type backing material and center material of PVC flooring, flooring By applying to a backing material, a sound insulation sheet, or a plastic pallet, material costs in the industrial field can be reduced, and resources can be saved.

Sectional drawing of the tile carpet of the product example 1. FIG. Sectional drawing of the flooring material of Product Example 2. The schematic diagram of an example of a sheet molding process.

  Hereinafter, embodiments for carrying out the invention will be specifically described.

  The vinyl chloride resin-based wallpaper to be treated by the present invention includes a vinyl chloride resin, a plasticizer, a filler, a stabilizer, a foaming agent, a foaming aid, a fungicide, a flame retardant, an ultraviolet absorber, a colorant or a pigment. Polyvinyl chloride surface layer composed of a film or sheet formed by adding a variety of conventional resin additives such as antioxidants and lubricants in consideration of the required purpose and effects, and a backing material The layers are laminated and integrated.

  Various additives for resins such as plasticizers, fillers, stabilizers, foaming agents, foaming aids, fungicides, flame retardants, UV absorbers, colorants or pigments, antioxidants, lubricants, etc., added to vinyl chloride resins Are widely used in the formation of vinyl chloride resin films or sheets, and the description thereof is omitted.

  The surface of the polyvinyl chloride surface material layer, which is the decorative surface, is coated with acrylic resin to improve surface gloss and surface strength, scratch resistance (scratch resistance), chemical resistance, stain resistance, In order to improve weather resistance and the like, a fluororesin coating may be applied, or a PMMA (polymethyl methacrylate) resin film, a polyolefin resin film, or the like may be laminated. Moreover, you may give a deodorizing, antibacterial, humidity control, and luminous function. A pattern or pattern that exhibits the most important aesthetic effect as wallpaper is printed with a printing ink in which a colored pigment is added to an acrylic resin or the like.

  Examples of the backing material layer include plain pulp paper, flame retardant paper obtained by treating plain pulp paper with a flame retardant, inorganic paper such as aluminum hydroxide or magnesium hydroxide, and inorganic paper mixed with glass fiber, woven fabric, and the like. .

  The vinyl chloride resin wallpaper with the above configuration can be selected from a wide range of colors and designs, is mass-productive, can be selected from a wide price range, has good workability, and is easy to maintain. In addition, some of them have been given various functions and have been evaluated for various advantages such as being stable in terms of physical properties. Paper-based wallpaper, fiber-based wallpaper, vinyl chloride resin-based wallpaper, plastic-based wallpaper, inorganic-based It accounts for about 95% of the total production of wallpaper.

  Mainly used as a vinyl chloride resin wallpaper is 31% by weight of polyvinyl chloride resin, 14% by weight of phthalate plasticizer, 1% by weight of calcium stabilizer, 6% by weight of titanium dioxide light shielding agent, and 23% by weight of calcium carbonate filler. % And pulp fiber 25% by weight are formed into a sheet with a thickness of 0.20 to 0.25 mm by a predetermined method, and acrylic resin is applied to the surface for surface gloss adjustment and surface strength improvement. The used vinyl chloride resin-based wallpaper that was applied with a surface treatment, printed with a pattern and pattern with a printing ink in which a colored pigment was added to an acrylic resin or the like was used as the wallpaper to be processed.

  Without separating the surface material layer made of polyvinyl chloride and the backing material layer made of pulp fiber, the screen mesh is pulverized to a screen mesh of 8 mm or less, preferably 5 mm or less, more preferably 4 mm or less by a general-purpose pulverizer. Hereinafter, this is referred to as “raw material”.

  If the pulverized size is too large, the raw material will increase the amount of paper components that do not melt, so clogging is likely to occur in the apparatus. For this reason, production may be hindered and yield may be deteriorated. On the other hand, if the pulverized size of the raw material is too small, the pulverized product tends to float and becomes difficult to handle, and the energy required for the pulverization process increases, which may lead to an increase in cost. Is 2 mm or more.

  The pulverized diameter of the raw material in the present invention is a value that should be determined in consideration of factors such as the state of conveyance of the raw material in the feeder, the state of resin melting, and the ability of the pulverizer, but it is 8 mm or less under normal conditions. The thickness is preferably 5 mm or less, more preferably 4 mm or less, since it is easy to convey and easy to extrude from the extruder.

  The raw material pulverized by the pulverizer is mixed and stirred with the polyvinyl chloride modifier. The mixing and stirring device is preferably a device capable of highly accurate mixing, such as a super mixer, a Henschel mixer, a Nauter mixer, a tumbler mixer, a ready mixer, a V-type blender, an open kneader and the like. In particular, a super mixer can be preferably used in terms of accuracy and processing capability. In order to disperse the fine particles uniformly, it is preferable to include a step of finely dispersing the fine particles from the powder by shearing in a kneader or a die. The mixing and stirring conditions may be appropriately set depending on the type of apparatus, the stirring conditions, the type of raw materials, the pulverization conditions, and the like. Solid mixing by the mixing and stirring device is sufficient if all the input materials are uniformly dispersed by mixing, and can be completed after confirming the finish with a dry feeling visually and by touch.

  As the polyvinyl chloride modifier of the present invention, it is desirable to use acrylic modified polytetrafluoroethylene. The polyvinyl chloride modifier is used in an amount of 2 to 7 parts by weight, preferably 3 to 6 parts by weight, more preferably 4 to 5 parts by weight. If the added amount of the polyvinyl chloride modifier is too small, the resin flow during the hot time is good, but the flexibility of the finally formed sheet is good, but on the other hand, the sheet strength during the hot time is soft and brittle. Become. On the other hand, if the addition amount is too large, the finally formed sheet becomes inflexible and hard, the sheet strength during hot time increases, and the resin flow load during hot time increases.

An example of the process of forming into a sheet is shown in FIG. In step 100 of FIG. 3, the kneaded product of the raw material and the polyvinyl chloride modifier is heated and melted by an extruder 23 and extruded from a mold (hereinafter referred to as “extrusion die 25”) that is widened into a sheet. This is a method of forming a sheet through a polishing roll 26. Extrusion molding conditions are the same as the resin sheet molding conditions generally used, and the temperature conditions may be set as appropriate.
The raw material X pulverized by a pulverizer and mixed and stirred by a mixing and stirring device such as a super mixer is conveyed from the service tank 20 by a storage feeder 21 and continuously sent to an extruder 23. Here, each resin composition is heated and melted, and is pumped to the extrusion die 25 through the breakable plate 24. The number of rotations of the screw (not shown) of the extruder 23 is preferably 10 rpm or more and 1000 rpm or less, more preferably 20 rpm or more and 700 rpm or less, and still more preferably 30 rpm or more and 500 rpm or less. If the rotational speed is slower than this, the residence time becomes longer, and the molecular weight may decrease due to thermal deterioration, which is not preferable. On the other hand, when the rotational speed is too high, molecules are likely to be cut by shearing, and problems such as a decrease in molecular weight and an increase in the generation of crosslinked gel are likely to occur. As the extrusion die 25, a T die, a hanger die, a fishtail die, a hanger coat die, a feed block die, a multi-manifold die, or the like is used. The extrusion die 25 may be of any type generally used as long as the molten resin stays in the die less. The extrusion die 25 is preferably one that can accurately adjust the thickness of the sheet. In this way, the raw material is heated and melted and extruded from the extrusion die 25. Moreover, it is preferable to provide a breakable plate 24 as a filter medium at the outlet of the extruder 23 for the purpose of filtering foreign matter in the resin and preventing damage to the gear pump due to foreign matter.

The dispersion extruded from the extrusion die 25 is pressed by the polishing roll 26 and formed into a sheet shape, and then gradually cooled and solidified on the polishing roll 26 to form the sheet 2. Further, when joining with the base material layer 9, the base material layer 9 is fed out at the same speed as the sheet 2 by the transport roll 28, and the surface of the base material layer 9 is in contact with the back surface of the sheet 2 by the place roll 29. Is superimposed on. The base material layer 9 and the sheet 2 are integrated by the polishing roll 26 and discharged.
Note that the step 100 shown in FIG. 3 is merely an example, and the number of polishing rolls 26, place rolls 29, transport rolls 28, and the like may be increased, decreased, or omitted as necessary.
The sheet 2 may be formed by pressure using a commonly used method for forming a resin sheet such as a calender roll, an extruder, or a press, but the method using the polishing roll 26 provides good layer thickness control accuracy. It is most preferable because the resin component of the dispersion is hardly denatured.

This will be described in more detail below.
5 parts by weight of “methabrene (registered trademark)” (acrylic modified polytetrafluoroethylene) manufactured by Mitsubishi Rayon Co., Ltd. as a polyvinyl chloride modifier with respect to 100 parts by weight of raw materials pulverized to a pulverization size of 3 to 4 mm, stearin 0.5 parts by weight of acid (trade name “Beadstearic acid cherry” manufactured by NOF Corporation), 1 part by weight of stabilizer (trade name “ADEKA STAB SP-96” manufactured by ADEKA CORPORATION), and DOP ( New Nippon Rika Co., Ltd. product name "Sunsizer DOP") 10 parts by weight, mixed with a general-purpose super mixer "SGM C-300" (Kawata Co., Ltd.) Got. The mixing conditions by the super mixer were set such that the stirring time was 2 to 3 minutes and the finished material temperature was 100 ° C. or lower. Solid mixing by the super mixer was confirmed to be complete when DOP was absorbed into the wallpaper.
A dispersion of the obtained raw material was converted into a twin screw extruder “GT110” (manufactured by Ikegai Co., Ltd .: screw diameter = 110 mm; rotation speed (rpm) = 30; L / D = 17 to 22 reverse groove having a reverse groove shape. Screw element configuration with three light elements, set temperature of cylinder (C1 = 145 ° C .; C2 = 155 ° C .; C3 = 175 ° C .; C4 = 170 ° C .; C5 = 170 ° C.), extrusion amount = 250-600, Twin screw extruder “GS125” (manufactured by Ikekai Co., Ltd .: screw diameter = 125 mm; rotation speed (rpm) = 30; L / D = 25 to 34; set temperature of cylinder (C1 = 165 ° C .; C2 = 170 ° C .; C3 = 170 ° C; C4 = 170 ° C; Adapter = 165 ° C; Die-neck = 165 ° C; Extrusion amount = 100 to 400, Resin pressure = about 200) One stainless steel wire mesh was attached as a breakable plate 24, melted and kneaded, and the resin composition was extruded.

  For the extrusion die 25, there is a T-die “Coat hanger die” manufactured by Uchida Seisakusho (die width = 1550 mm; lip clearance = 4.5 mm; temperature (D1 (end) = 187 ° C .; D2 = 185 ° C .; D3 = 178 ° C .; D4 (center) = 178 ° C .; D5 = 178 ° C .; D6 = 185 ° C .; D7 (end) = 187 ° C.), and then discharged from the extrusion port of the extruder 23 through the breakable plate 24. The resulting extrudate was widened into a sheet.

The resin composition widened by the extrusion die 25 was rolled into a sheet having a thickness of 5 mm by a polishing roll 26 (manufactured by Mitsumata Special Metal Industry Co., Ltd.) under the following conditions.
Rolling conditions:
Speed (m / min): Upper roll = 1.28; Middle roll = 1.28; Lower roll = 1.00
Temperature (° C.): Upper roll = 30; Middle roll = 70; Lower roll = 70
Clearance (mm): Between upper roll and roll = open; Between middle roll and lower roll = 4.5
Crest shape: upper roll = mirror surface; middle roll and lower roll = satin

  It was confirmed that the sheet having a thickness of 5 mm produced in Example 1 could be used for a sheet or tile-type PVC flooring backing material, flooring backing material, sound insulation sheet, plastic pallet and the like.

  In advance, the opening diameter of the breaker plate 24 of the extruder was changed from that of Example 1 to an opening ratio of 37%, the resin pressure was lowered to 120, and the fluidity of the resin was improved.

  Using the dispersion of the raw materials produced in Example 1, a thickness of 2 mm was obtained by a general-purpose sheet molding apparatus comprising the extruder 23, the extrusion die 25 and the polishing roll 26 having the same specifications as in Example 1. Rolled into a sheet.

  It was confirmed that the sheet having a thickness of 2 mm produced in Example 2 could be used for a sheet or tile-type PVC flooring backing material, flooring backing material, sound insulation sheet, plastic pallet and the like.

  FIG. 1 is a cross-sectional view of a tile carpet manufactured using the sheet 2 of the present invention by a sheet lamination method or a single wafer lamination method. In FIG. 1, 1 is a tile carpet, 2 is a recycled sheet of wallpaper produced in Example 1, 3 is a first adhesive layer, 4 is a base fabric, 5 is a second adhesive layer, 6 is a living machine, 7 Is a base fabric, 8 is a carpet texture, and 9 is a base material layer.

  In Example 3, the recycled sheet 2 having a thickness of 5 mm manufactured in Example 1 is used, but this thickness is not particularly limited. That is, the sheet 2 once manufactured to a thickness of 5 mm is cut to a predetermined thickness required as a constituent material of the tile carpet 1, or is formed in advance to another thickness required for the constituent material of the tile carpet 1. Also good.

The 1st adhesive bond layer 3 will not be specifically limited if the sheet | seat 2 and the base fabric raw fabric 4 are completely joined and integrated. For example, a conventional adhesive such as polyvinyl chloride or acrylic can be used. For example, the following blending components using a paste vinyl chloride resin sol having an average degree of polymerization of about 1300 to about 2000 are exemplified. In addition, other additives can be blended in the following blending as necessary, and the blending ratio can be changed.
Compounding ingredient weight%
Paste vinyl chloride resin sol 10-20
Plasticizer (DOP) 10-20
Filler (calcium carbonate) 50-70
Stabilizer (Ba-Ca-Zn) Predetermined amount Epoxidized soybean oil Predetermined amount

  The second adhesive layer 5 is not particularly limited as long as it completely joins and integrates the underlying glass base fabric 4 and the backing of the living machine 6. Therefore, the same compounding components as the first adhesive layer 3 can be used.

  The base fabric raw fabric 4 sandwiched between the first adhesive layer 3 and the second adhesive layer 5 is a woven or non-woven fabric of natural fibers or synthetic fibers, for example, a woven or non-woven fabric of glass fibers, or a plain weave of polyester fibers. That is, it can be arbitrarily selected from a cold chill, a glass net, and the like.

  The living machine 6 is obtained by tufting or joining a carpet texture 8 made of natural or synthetic fibers to a base fabric 7 made of natural or synthetic fibers. In FIG. 1, the texture 8 is described in a loop shape, but is not particularly limited. That is, in the present invention, carpets with piles and carpets without piles are targeted.

  The base material layer 9 is for the purpose of balancing the warp in the construction of the manufactured tile carpet 1, maintaining the durability of the lowermost layer surface, preventing slipping, and the like. It is also possible to bond the layers together. As a manufacturing method, there are a method of previously laminating at the time of manufacturing a recycled sheet of wallpaper, a method of first feeding out at the time of paste processing, coating a vinyl chloride paste, and laminating a recycled sheet of wallpaper. Examples of the material of the base material layer 9 include woven fabrics or nonwoven fabrics of natural fibers or synthetic fibers, for example, woven fabrics or nonwoven fabrics of glass fibers, plain weaves of polyester fibers, that is, cold chills, glass nets, and the like conventionally used. Is done. Naturally, materials originating from recycled products of natural or various synthetic rubbers or various thermoplastic synthetic resin molded products can also be used.

  Examples of the method for producing the tile carpet 1 include the following Production Example 1 and Production Example 2, but are not limited thereto.

Production example 1 (sheet lamination method)
The sheet 2 is fed out, and the surface thereof is coated with the first adhesive layer 3 made of the above-mentioned paste vinyl chloride sol composition with a thickness of about 1 to 5 mm, and the above-mentioned base fabric raw fabric 4 is laminated thereon. The base fabric 4 is coated with the second adhesive layer 5 made of the above-mentioned paste vinyl chloride sol blend, and the living machine 6 is further laminated thereon, and the paste is gelled in an oven device so that the layers are integrated. The tile carpet 1 was manufactured by cutting the raw material manufactured by bonding into a predetermined shape (for example, 500 mm square size) with a cutter.

Production Example 2 (Single wafer stacking method)
The sheet 2 is roughly cut and a single-wafer plate is formed by a press method. The first adhesive layer 3 made of the above-mentioned paste vinyl chloride sol composition is coated on the surface of the plate with a roll coater and the adhesive 100 to 500 g / m ² is coated thereon. The base fabric 4 is coated with the second adhesive layer 5 made of the above-mentioned paste vinyl chloride sol blend, and the living machine 6 is further laminated thereon, and the paste is gelled in an oven device so that the layers are integrated. A large tile carpet is formed by bonding. The tile carpet 1 was manufactured by cutting into a predetermined shape (for example, 500 mm square size) with a cutter after the adhesive was cured. The adhesive used in Production Example 2 is preferably a two-component reactive urethane adhesive or a one-component moisture-curable urethane adhesive. This is because a vinyl acetate-based or acrylic water-based adhesive takes a long time to dry and is likely to cause poor adhesion.

  FIG. 2 is a cross-sectional view of the flooring 12. Reference numerals 2, 4 and 9 in FIG. 2 are the same materials as those in FIG.

In FIG. 2, 10 is an intermediate layer, for example, a 2.0 mm thick polyvinyl chloride sheet made of the following blending components was used. In addition, you may mix | blend the various additives for polyvinyl chloride used as needed.
Ingredients by weight Polyvinyl chloride (degree of polymerization 1100) 100
Plasticizer (DOP) 10-30
Stabilizer (Ba-Ca-Zn series) 4-5
Colorant 1-2

In FIG. 2, reference numeral 11 denotes a surface protective layer, for example, a polyvinyl chloride film having a thickness of 0.4 mm made of the following blending components. In addition, you may mix | blend the various additives for polyvinyl chloride used as needed.
Ingredients by weight Polyvinyl chloride (degree of polymerization 1100) 80-100
Matte polyvinyl chloride 20-30
Plasticizer (DOP) 10-40
Filler (calcium carbonate) 20-40
Stabilizer (Ba-Ca-Zn series) 1-5
Colorant 1-5

  Examples of the method for producing the flooring 12 include the following Production Example 1 and Production Example 2, but are not limited thereto.

Production example 1 (sheet lamination method)
The sheet 2 is fed out, and the base fabric raw fabric 4 is laminated on the surface. The vinyl chloride resin intermediate layer 10 is laminated on the base fabric raw fabric 4, and a vinyl chloride printed sheet serving as a design layer is formed thereon. Laminate, and a surface protective layer 11 made of a clear vinyl chloride sheet is further laminated thereon, and the layers are bonded together by softening the vinyl chloride resin with a heating oven apparatus and then pressing with an iron roll. Thus, the flooring 12 was manufactured.
If desired, after pressing with an iron roll, the surface may be reheated and crimped with an embossing roll to impart conduit embossing or satin embossing to the surface. In addition, the lower layer sheet 9 can be bonded to the lower side of the sheet 2 for the purpose of balancing the warpage of the structure, maintaining the durability of the lowermost layer, and preventing slipping. As a manufacturing method, a method of previously laminating at the time of manufacturing the sheet 2 or a method of first feeding and laminating the sheet 2 at the time of laminating can be used. Further, by laminating the base fabric 4 between the intermediate layer 10 and the sheet 2, it is possible to improve the dimensional stability of the base material.

Production Example 2 (Single wafer stacking method)
The sheet 2 is roughly cut, and a sheet plate is formed by a press method. A base fabric 4 is laminated on the surface of the plate, the vinyl chloride resin intermediate layer 10 is laminated on the base fabric 4, and a vinyl chloride printed sheet serving as a design layer is further laminated thereon. By laminating a surface protective layer 11 made of a clear vinyl chloride sheet on top and softening the vinyl chloride resin with a heating oven apparatus and then pressing with an iron roll, the layers are bonded together, The flooring 12 can be manufactured by forming a vinyl chloride tile and cutting it into a predetermined shape (for example, 500 mm square size) with a cutter.
The adhesive here is preferably a two-component reaction type urethane adhesive or a one-component moisture-curing type urethane adhesive.

1. A pulverized product obtained by cutting the waste material of the polyvinyl chloride resin wallpaper with the surface layer layer and the backing layer made of polyvinyl chloride joined and integrated together is obtained by high-speed kneading together with the polyvinyl chloride modifier. Since the resulting dispersion is formed into a sheet by pressurization, the surface layer material layer and the backing material layer made of polyvinyl chloride are separated and pulverized or further heated to melt into pellets as in the past. Unlike the method, it does not require specially developed special devices, machines, instruments, etc., and does not require a large cost for initial capital investment, maintenance costs, etc. Therefore, for example, vinyl chloride-based wallpaper waste materials are reused for products that require cost and production process simplification rather than finished state, such as floor surface unevenness adjustment materials, base materials, and carpet back layers. There are industrial applicability in some cases.

2. Since it includes a step of kneading the polyvinyl chloride wallpaper at a high speed together with the polyvinyl chloride modifier without separating the surface material layer and the backing material layer made of polyvinyl chloride, respectively, in the subsequent step, from the polyvinyl chloride The resulting surface layer material layer can be efficiently melted, and the backing material layer can be obtained as a kind of cellulose-based filler. The cellulose-based filler thus obtained is used as a filler for rubbers and plastics, and is a fiber floc and cottonseed made of alpha fiber element obtained by alkali-treating and mechanically chopping wood pulp. It can be made to function as a substitute for cotton liters or cotton flocks obtained from the above, or human silk flocks obtained by chopping human silk. This cellulose-based filler has effects such as improved processability, prevention of deformation / shrinkage, and improvement of hardness over polyvinyl chloride.

3. By selecting acrylic modified polytetrafluoroethylene as the polyvinyl chloride modifier, the melt tension of the polyvinyl chloride is increased, the flow characteristics of the resin in the molding process are improved, and the appearance of the molded product is improved. In the case of products that require cost and simplification of the manufacturing process rather than the finished state, such as floor surface unevenness adjustment materials, base materials, carpet back layers, etc., by recycling vinyl chloride wallpaper waste materials Has industrial applicability.

4). Since the polyvinyl chloride wallpaper is crushed to the smallest possible size without separating the surface layer layer and the backing layer made of polyvinyl chloride, for example, 8 mm or less, desirably 5 mm or less, more desirably 4 mm or less. There is no hindrance in the subsequent molding process such as pressing. Therefore, for example, by recycling vinyl chloride wallpaper waste material, cost and simplification of the manufacturing process are required rather than the finished state, such as floor surface unevenness adjusting material and base material, carpet back layer, etc. There is industrial applicability in the case of products.

5. The recycled sheet according to the present invention can be used as a constituent material for tile carpets or flooring materials, flooring backing materials, sound insulation sheets, plastic pallets, and the like, which can contribute to effective use of resources and cost reduction of material costs. it can.

DESCRIPTION OF SYMBOLS 1 Tile carpet 2 Wallpaper recycling sheet 3 1st adhesive layer 4 Base cloth original fabric 5 2nd adhesive layer 6 Raw machine 7 Base cloth 8 Carpet texture 9 Base material layer 10 Middle layer 11 Surface protection layer 12 Flooring material 20 Service tank 21 Storage Feeder 23 Extruder 24 Breakable Plate 25 Extrusion Die 26 Polishing Roll 28 Transport Roll 29 Place Roll 100 Sheet Forming Process

Claims (4)

The waste material of the polyvinyl chloride resin-based wallpaper in which the surface material layer and the backing material layer made of polyvinyl chloride resin are joined and integrated is cut into a predetermined size to obtain a pulverized product,
Comprising pressing the dispersion obtained by kneading the pulverized product with a polyvinyl chloride resin modifier at high speed to form a sheet,
The backing material layer is a flame retardant paper obtained by treating plain pulp paper or plain pulp paper with a flame retardant,
The polyvinyl chloride resin modifier is acrylic modified polytetrafluoroethylene;
Does not contain wood flour,
A method for recycling vinyl chloride wallpaper. The method for recycling a vinyl chloride wallpaper according to claim 1, wherein in the high-speed kneading, the pulverized product is finely divided and finely dispersed. A crushed material of a waste material of a polyvinyl chloride resin-based wallpaper including a surface layer layer and a backing layer made of polyvinyl chloride resin, and a polyvinyl chloride resin modifier
The backing material layer is a flame retardant paper obtained by treating plain pulp paper or plain pulp paper with a flame retardant,
The polyvinyl chloride resin modifier Ri acrylic-modified polytetrafluoroethylene der,
Does not contain wood flour,
A sheet characterized by that. A structure comprising the sheet according to claim 3 as one of constituent materials.

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