JPH07309959A - Tape containing waste synthetic resin, cloth member containing waste synthetic resin and production of tape containing waste synthetic resin - Google Patents

Abstract

PURPOSE:To realize the reduction and recycling of waste synthetic resins and to fully utilize waste synthetic resins by combining virgin synthetic resins with waste synthetic resins. CONSTITUTION:This tape is prepared by combining at least a virgin synthetic resin with a waste synthetic resin in a specified ratio. Alternatively, it is prepared by laminating a plurality of tapes made of a virgin synthetic resin and a plurality of tapes made of a waste synthetic resin. A process comprising melting a virgin synthetic resin, grinding a waste synthetic resin into pellets, melting the pellets, extruding these melts into a laminated film, cutting the laminated film into tapes and stretching the tapes is also adopted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a tape by combining a synthetic resin waste material and a new synthetic resin material, and forms a cloth member from the tape to effectively use the synthetic resin waste material. The present invention relates to a synthetic resin waste material-containing tape, a synthetic resin waste material-containing cloth member, and a method for producing a synthetic resin waste material-containing tape, which can contribute to environmental protection by reducing the amount of resin waste material and promoting recycling.

[0002]

2. Description of the Related Art Recently, in order to protect gas pipes buried in the ground from excavating tools in road excavation work such as road construction and other construction, a single unit such as polyethylene or polypropylene is placed directly above the gas pipe. A protective sheet in which a woven fabric is laminated has been used. This is in order to strengthen the protection of the polyethylene pipe in view of the present situation that the gas pipe is recently replacing the conventional steel pipe or cast iron pipe with the polyethylene pipe. The protective sheet is formed by forming a film of polyethylene or polypropylene by an inflation molding method, forming a tape from the film, and weaving the film at a predetermined density. Further, in order to increase the strength, polyethylene is formed on the outer layers 1a and 1b. , So that the inner layer 1c is made of polypropylene 3
It is proposed that the tape 1 (see FIG. 6) laminated in layers is used and formed by weaving. By the way, as mentioned above, the gas pipes buried in the ground are replacing the conventional steel pipes and cast iron pipes with polyethylene pipes, but since polyethylene pipes do not corrode, they can be used for a long time. Moreover, it has various advantages such as being lighter in weight than steel pipes and the like, which is advantageous in working. When burying such polyethylene gas pipes, excess pipes are generated due to the piping work, and such excess pipes must be incinerated or crushed to landfill and discarded without any use. It was Therefore, it has been proposed to reuse the above-mentioned surplus piping as a material for the above-mentioned protective sheet.

[0003]

However, when the excess piping is pretreated and melted, or reprocessed such as molding, molding defects may occur due to mixing of impurities, and the material of the woven fabric is formed only from the excess piping. Was difficult to form into a tape. The present invention has been proposed in order to solve such a problem, in which a tape is formed by combining a synthetic resin waste material and a new synthetic resin material, and a synthetic resin is formed by forming a cloth member from the tape. Synthetic resin waste material-containing tape, synthetic resin waste material-containing cloth member, and synthetic resin waste material-containing tape, which contributes to environmental conservation by promoting effective utilization of waste material, reducing the amount of synthetic resin waste material, and promoting recycling. It is intended to provide a manufacturing method.

[0004]

In order to solve the above-mentioned problems, the present invention is characterized in that at least a new synthetic resin material and a synthetic resin waste material are combined in a predetermined ratio. Further, the present invention is characterized in that a plurality of tapes made of a new synthetic resin material and a tape made of a synthetic resin waste material are laminated. Further, according to the present invention, a synthetic resin waste material-containing cloth member can be configured by combining at least a new synthetic resin material and a synthetic resin waste material in a ratio within a predetermined range. . Further, according to the present invention, it is possible to construct a synthetic resin waste material-containing cloth member by laminating a plurality of tapes made of a new synthetic resin material and a tape made of a synthetic resin waste material, and weaving the laminated tapes. Furthermore, the present invention is, as a method for producing a synthetic resin waste material-containing tape, while melting a new synthetic resin material, crushing and pelletizing the synthetic resin waste material, and melting the synthetic resin new material and the synthetic resin waste material. A step of extruding into a laminated film shape, forming the laminated film into a tape shape, and stretching it can be adopted.

[0005]

[Function] While the new synthetic resin material is melted, the synthetic resin waste material is crushed into pellets and melted, and the synthetic resin new material and the synthetic resin waste material are extruded into a laminated film, and the laminated film is taped. A synthetic resin waste material-containing tape can be obtained by forming it into a shape and stretching it. And
A synthetic resin waste material-containing cloth member can be obtained by weaving this synthetic resin waste material-containing tape. In this way, by using synthetic resin waste materials, forming a combination tape with new materials and forming cloth members, it is possible to effectively use synthetic resin waste materials, and by reducing the amount of waste synthetic resin, environmental conservation Can contribute to.

[0006]

EXAMPLES Next, a synthetic resin waste material-containing tape, a synthetic resin waste material-containing cloth member, and a method for producing a synthetic resin waste material-containing tape according to the present invention will be described in detail below with reference to an embodiment. A textile 10 is shown in FIG. 1, and this textile 1
0 is a synthetic resin waste material-containing cloth member, that is, a tape is formed from a polyethylene gas pipe which is a surplus pipe generated during burying work, while a tape is formed from a new synthetic resin material such as high density polyethylene. A laminated tape 11 in which the respective tapes are laminated is woven vertically and horizontally. As shown in FIG. 2, the laminated tape 11 has a two-layer structure in which a high density polyethylene tape 11NPE and a waste tape 11OPE formed from a polyethylene gas pipe are superposed. Also, as shown in FIG.
A waste tape 11OPE may be laminated on the inner layer, and a high-density polyethylene tape 11NPE may be laminated on both outer layers, or a three-layer structure may be used.

Next, the laminated tape 1 constituting the knitted fabric 10
The process of forming No. 1 will be shown and described. The laminated tape 11 is formed by adopting an inflation molding method as shown in FIG. Here, the laminated tape 11 having a three-layer structure is used.
An example will be described. A system for executing such an inflation molding method is an extruder 12 for melting a synthetic resin material, an inflation die 13 having a thin cylindrical slit provided at the tip of the extruder 12, and a tube extruded from the inflation die 13. Cooler for blowing cooling air from around the film material
4 and the film-shaped material swelling in the shape of a tube to the stabilizer 1
5, a nip roll 16 that is folded through 5, a stretching portion 18 that stretches the tape at a predetermined magnification through a slit 17 that is formed from a film-like material into a tape having a predetermined width, and an annealing portion 19 that anneals the stretched tape. Be prepared. The extruder 12 includes an extruder 12A (outer layer), an extruder 12B (intermediate layer), and an extruder 12C (inner layer) so that each layer of the laminated tape 11 is charged and melted with a material corresponding to the layer. ing. The inflation die 13 is a 250φ cylindrical die, and the extruder 1
It is a multi-layer die in which a molten material is introduced from 2A to 12C and a three-layer tubular film is extruded. The extension part 18
Is a hot plate stretching method, and stretches at a predetermined temperature. The annealing part 19 removes the strain of the tape by heating the stretched tape to a predetermined temperature and gradually cooling it.

The system for carrying out inflation molding has been described above. Next, the process of forming the three-layer laminated tape 11 using this system will be described. 1. System conditions Extruder 12A-12C Temperature ... 170-200 ° C (3
Multi-layer die temperature …………………… 190-200 ℃ Stretching temperature ………………………… 80-105 ℃ Stretching ratio …………………… 5-9 times 2. Input material composition Outer layer, inner layer ………… Virgin raw material of high density polyethylene and polypropylene Middle layer …………. Excess piping → Regenerated pellets (high density polyethylene, medium density polyethylene, low density polyethylene, polypropylene, etc.) In the case of a two-layer tape, the outer layer or inner layer: virgin raw material of high-density polyethylene or polypropylene Inner layer or outer layer: excess piping → recycled pellets (same as in the case of three-layer tape)

3. Process Each of the above-mentioned input materials is charged into each of the extruders 12A to 12C to be melted, and then introduced into the inflation die 13 for 3
Extrude the tubular film of layers. In the inflation die 13, compressed air is sent from the inside of the cylindrical slit of the die to inflate it into a tube shape, and at the same time, the cooler 1
4, cooling air is blown from the surroundings to cool it, and it is sent to the nip roll 16 via the stabilizer 15, and the tubular film is folded to complete the film formation. Then, the folded film is fed into the slit 17 to form a tape having a predetermined width. Then, in the stretching section 18,
The tape is drawn at a drawing temperature of 80 to 105 ° C. and a draw ratio of 5
The film is stretched at a stretch ratio of up to 9 times and heat-treated in the annealing part 19 to obtain the desired laminated tape 11, which is wound by a winding machine (not shown), and the process is completed (see FIG. 5).
Then, the woven fabric 10 can be obtained by weaving the laminated tape 11 at a predetermined density (see FIG. 1). As described above, the surplus pipe generated during the pipe burying work is used to form the laminated tape 11 together with the new material, and the knitted fabric 10
Since it is possible to reduce the amount of waste material, it is possible to reduce the amount of waste material and to contribute to environmental protection by effectively using the excess piping. An example of the forming process of the laminated tape 11 having the three-layer structure has been described above, but the laminated tape 11 having the two-layer structure can be formed by the same process, and thus the description thereof will be omitted.

Here, the thickness composition ratios of the laminated tape 11 formed by the above-described forming process will be listed. (1) Thickness composition ratio Composition ratio ・ In the case of 3-layer tape Outer layer (HDPE) Intermediate layer (waste PE) Inner layer (HDPE) Min 1 1 1 Max 1 6 1 1 That is, 33% ≦ Waste PE composition ratio ≦ 75%・ In the case of two-layer tape Outer layer (waste PE) Inner layer (HDPE) Min 1 2 Max 3 1 That is, 33% ≦ waste PE composition ratio ≦ 75% Multilayer tape thickness Min 5μ Max 150μ (stretchable limit)

Next, the laminated tape 11 and the woven cloth 10
, And the physical properties of general products are compared and listed. (2) Physical property comparison General products: Woven fabric for gas pipe caution sheet Prototype: HDPE (25%) / Waste PE (50%) / HD
PE (25%) Tape comparison Prototype general product Strength (g / D) 5.1 4.7 Elongation (%) 25 28 Woven fabric comparison Prototype general product Tensile strength (kgf / 5cm) Length 102.1 110. 2 Horizontal 102.1 96.1 Elongation (%) Longitudinal 18 21 Horizontal 17 20 Comparison result At a mixing ratio of waste PE of about 50%, almost no decrease in strength was seen compared to the normal virgin raw material alone. I know I can't.

The synthetic resin waste material-containing tape, the synthetic resin waste material-containing cloth member, and the method for producing the synthetic resin waste material-containing tape according to the present invention have been described with reference to one embodiment. In addition to the use as a protective sheet, it can be applied as a leisure sheet, an underground buried object marking sheet, a curing sheet, a bag, and the like.

[0013]

As described above, according to the present invention, the synthetic resin waste material can be effectively utilized by forming the cloth member by forming the combined tape with the new material using the synthetic resin waste material. By reducing the amount of discarded synthetic resin, it is possible to contribute to environmental conservation.

[0014]

[Brief description of drawings]

FIG. 1 is a schematic plan explanatory view showing an example of a knitted fabric according to the present invention.

FIG. 2 is a schematic cross-sectional explanatory view showing a structure of a synthetic resin tape applied to the knitted fabric shown in FIG.

FIG. 3 is a schematic cross-sectional explanatory view showing a configuration of a synthetic resin tape applied to the knitted fabric shown in FIG.

FIG. 4 is a schematic explanatory view showing a system configuration for forming a tape which constitutes the knitted fabric in the present invention.

5A to 5C are process explanatory diagrams in the system shown in FIG.

FIG. 6 is a schematic cross-sectional explanatory view showing the structure of a synthetic resin tape applied to a conventional knitted fabric.

[Explanation of symbols]

10 Woven woven fabric 11 Laminated tape 11 NPE High density polyethylene tape 11 OPE Waste tape 12A-12C Extruder 13 Inflation die 14 Cooler 15 Stabilizer 16 Nip roll 17 Slit 18 Stretching part 19 Annealing part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number in the agency FI Technical display location D03D 15/02 C // B29L 9:00 (72) Inventor Yuichi Oki Nakazawa, Asahi-ku, Yokohama-shi, Kanagawa Machi 56-36 (72) Inventor Yuji Chiba 3-23-5-106 Maeno-cho, Itabashi-ku, Tokyo (72) Inventor Takuya Maeda 2-2-20-3-212 Shioyaki, Ichikawa-shi, Chiba (72) Inventor Shitara Kunio 2-6-13 Kyobashi, Chuo-ku, Tokyo (72) Inventor Toshikazu Shimamura 4-10-13 Inayoshi, Chiyoda-cho, Shinji-gun, Ibaraki Prefecture 7-72 Inventor Yuji Haga 3-6-Inayoshi, Inayoshi, Chiyoda-cho, Ibaraki Prefecture No. 33-205

Claims (5)

[Claims] 1. A synthetic resin waste material-containing tape comprising at least a new synthetic resin material and a synthetic resin waste material combined in a predetermined ratio. 2. A tape containing a synthetic resin waste material, characterized in that a plurality of tapes made of a new synthetic resin material and a tape made of a synthetic resin waste material are laminated. 3. A synthetic resin waste material-containing cloth member comprising at least a new synthetic resin material and a synthetic resin waste material which are combined in a predetermined ratio. 4. A synthetic resin waste material-containing cloth member, characterized in that a plurality of tapes made of a new synthetic resin material and a tape made of a synthetic resin waste material are laminated, and the laminated tapes are woven and formed. 5. The synthetic resin new material is melted, the synthetic resin waste material is crushed and pelletized and melted, and the synthetic resin new material and the synthetic resin waste material are extruded into a laminated film form, and the laminated film is obtained. A method for producing a tape containing a synthetic resin waste material, which comprises forming the tape into a tape shape and stretching the tape.