KR101047275B1 - A pipe produced by composing polyvinyl chloride and polycarbonate - Google Patents

Abstract

PURPOSE: A pipe produced by synthesizing polyvinyl chloride and polycarbonate is provided to ensure high strength, excellent durability, and transparency and to enable visual inspection of the part solvent-fused between a pipe and a ferrule. CONSTITUTION: A pipe includes a synthetic material including 60~80 weight% of polyvinyl chloride and 10~20 weight% of polycarbonate. The polyvinyl chloride is a transparent CPVC raw material including a chlorinated vinyl chloride-based resin having the chlorine content of 60~70 weight% and an acrylic copolymer latex having the chlorine content of 30~40 weight%. The pipe further includes transparent ferrules(110,120,130,140,150) having a pipe body(101) and a pipe joint portion(112).

Description

A pipe produced by composing Polyvinyl chloride and Polycarbonate}

The present invention relates to a pipe of the present invention, and more particularly to a synthetic pipe obtained by synthesizing polycarbonate to PVC.

The present invention also relates to a transparent pipe having high strength properties and transparency.

Generally, it is manufactured using general polyvinyl chloride (PVC) or transparent polyvinyl chloride (CPVC) as a material of a pipe or a fitting for the piping.

Polyvinyl chloride products have been deemed harmful by some countries and environmental groups because of the concern that outdoor incineration may cause dioxin generation, but the content of the 2004 European PVC Life Cycle Assessment (LCA) report or Japan in 2006 As it is possible to obtain eco-friendly mark for all PVC products, it is attracting attention as eco-friendly product.

In other words, PVC products can be used for a long time to fundamentally reduce the amount of waste generated, and since they are manufactured using salt, it is possible to save resources by reducing consumption such as oil, and can be used as a PVC window system to save energy, and steel pipe Compared to this, it emits very little carbon dioxide and can prevent global warming and can be recycled through separate collection.

However, conventional PVC pipes with low strength have a problem in that they need to be provided with a larger thickness in order to be used in high pressure pipes such as water pipes. In addition, when the PVC pipe is buried underground, when the load applied to the ground and the external pressure by the vehicle are repeatedly applied, the PVC pipe may not be able to withstand the external pressure. The reason for this is that the bent portion is more likely to be damaged when external pressure is applied at the bent boundary with a relatively lower strength than the cast iron pipe.

Polycarbonate (PC), on the other hand, is a thermoplastic polymer, which is lightweight, hard, and easily processed, injection molded, and thermoformed. Polycarbonate is widely used in the exterior materials of IT products such as mobile phones, laptops and monitors, as well as in media optical storage media such as plastic materials of CDs and DVDs, as well as the raw materials of transparent head parts of automobile headlights and lighting equipment. This material is the transparent material that wrapped the iMac when Apple succeeded in recovering it with an iMac designed in the late 1990s.

However, polycarbonate has these advantages, but the surface itself has a weak problem of scratching. Although it is a kind of engineering plastic that is resistant to impact, it has a disadvantage of being scratched. Recently, a technique of treating with a nano-particle coating has been used to compensate for this disadvantage. In addition, it is easy to be discolored by ultraviolet light, and the transparency is difficult to use thick products that are difficult to use for optics. In addition, it is difficult to make a thick plate due to the characteristics of the polycarbonate.

The present invention is to solve the low-strength problem of the pipe formed of the conventional PVC only, to provide a more excellent and flexible pipe by synthesizing a material that can increase the strength to the existing PVC.

In addition, the present invention. The object of the present invention is to provide a pipe having high strength transparency by synthesizing polycarbonate to a transparent CPVC raw material having transparency.

Another object of the present invention is to provide a pipe that can be installed more conveniently and accurately by providing at least one marking portion on the outer peripheral surface of the pipe joint to provide a marking function.

Another object of the present invention is to visually inspect the solvent fusion between the pipe and the joint pipe according to the properties of the transparent CPVC raw material and the high strength characteristics of the polycarbonate, and can check the presence and flow of fluid after construction, UV coating layer The purpose is to provide a CPVC, polycarbonate composite pipe with enhanced UV resistance.

The objects of the present invention as described above are achieved by a pipe made of a synthetic material comprising 60 to 80% by weight of polyvinyl chloride and 10 to 20% by weight of polycarbonate, as will be described in detail below.

According to another feature of the present invention, the polyvinyl chloride is a transparent CPVC comprising a chlorinated vinyl chloride resin having a chlorine content of 60 to 70% by weight and an acrylic copolymer latex having a chlorine content of 30 to 40% by weight. to be.

According to another feature of the invention, the pipe further comprises a transparent joint pipe having a pipe and a pipe joint portion, the pipe joint portion to form a scratch mark without a separate writing tool, the marking portion is the circumference of the pipe joint portion It extends along the direction and is formed to have a ring shape.

The marking portion may be formed by a scratched print layer or a heat sensitive label,

The outer surface of the tube and the pipe joint portion may be further formed with an ultraviolet coating layer consisting of 99.9 ~ 99.0 wt% coating agent, and 0.1 to 3.0 wt% sunscreen.

According to another feature of the invention, the pipe joint 112 may be further formed with a marking portion recess recessed in the outer surface of the pipe joint portion to seat the marking portion 200.

According to the pipe synthesized polycarbonate in the polyvinyl chloride of the present invention, it has a high strength characteristics, excellent durability and at the same time satisfies the transparency there is an advantage that can be used in pipe piping system for water and sewage.

In addition, the CPVC and polycarbonate composite transparent pipe of the present invention can visually inspect the solvent fusion between the pipe and the joint pipe according to the characteristics of the raw material of the polycarbonate having a transparent CPVC and transparent properties, and the presence and flow of fluid after construction There is an advantage to check.

In addition, CPVC and polycarbonate composite transparent tube of the present invention is to perform indentation marking using nails, pointed, etc., the marking portion consisting of a scratch scratch printing layer (heat blind label) pipe joints It is formed on the outer circumferential surface of the part, so that the operator can show the pipe direction or angle of the pipe to the pipe or the pipe assembly without having to carry a separate writing tool such as an oily sign pen at the pipe construction site, or facilitate any marking required during the construction work. By making it easy to mark, as a result, there is an advantage that the pipe construction or piping work can be performed accurately and easily.

In addition, the CPVC and polycarbonate composite transparent tube of the present invention has the advantage that the ultraviolet coating layer can be formed on the outer surface of the tube to enhance the ultraviolet resistance performance.

In addition, the CPVC and polycarbonate composite transparent pipe of the present invention can produce the outer surface of the fitting pipe more beautiful and smooth by placing the marking portion in the marking portion seating groove, the outer portion of the marking portion at the time of placing or placing the fitting pipe There is an advantage that can prevent the damage.

1 is an enlarged view of a CPVC and a polycarbonate synthetic transparent joint and a characteristic configuration thereof according to an embodiment of the present invention.
2A to 2D are views for explaining a construction method of the CPVC and the polycarbonate composite transparent joint shown in FIG. 1.
FIG. 3 is a perspective view illustrating a transparent CPVC and polycarbonate composite water and sewage pipe to which the CPVC and polycarbonate synthetic transparent joints shown in FIG. 1 are applied.
4 is an enlarged cross-sectional view showing an ultraviolet coating layer formed on the outer surface of the tube as an application example of the CPVC and the polycarbonate composite transparent joint shown in FIG.
FIG. 5 is an enlarged cross-sectional view illustrating an ultraviolet coating layer, a mounting groove, and a marking part as another application example of the CPVC and the polycarbonate composite transparent joint shown in FIG. 1.

In order to fully understand the present invention, the advantages of the operability of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

Polycarbonate (PC) has been developed by General Eelectric, Union Carbide, Allied Chemical, Eastman Kodak, former Soviet Union, OVSmrnova and GSKolesnkov, etc. Synthetic methods have been developed. Among the more than 200 polycarbonate synthesis methods, BisphenoL A has been synthesized in particular for industrial production.

The impact resistance of polycarbonates is exceptionally high among engineering plastics. On the other hand, in the aspect of impact fracture in terms of ductile fracture and brittle fracture, polycarbonate does not always show ductile fracture but also shows brittle fracture. Factors affecting this include molecular weight, temperature, round size at the corner of the product, thickness, additives, and deterioration of the resin. In terms of molecular weight, the impact strength drops sharply at a molecular weight of 20,000 or less, showing the highest impact strength at 28,000 to 30,000. For those parts that require high impact, products with molecular weights between 28,000 and 30,000 are used.

In addition, polycarbonate is a product having transparency among engineering plastics, and has a wide range of applications using it, and it is widely used in optical applications as a product having excellent impact resistance, heat resistance, and dimensional stability compared to acrylic resin. The light transmittance also has a light transmittance of 80% to 90% in the visible part, but almost no infrared light. Since the refractive index of polycarbonate is larger than that of acryl, it has advantages in designing a lens.

On the other hand, the present invention is a polyvinyl chloride (PVC) generally used in the manufacture of pipes by mixing a polycarbonate excellent in mechanical strength, impact strength and transparency in a predetermined ratio, excellent impact resistance and excellent rigidity and dimensional stability reinforced synthetic resin Provide pipe.

The material of the pipe according to the present invention synthesizes 10 to 20% by weight of polycarbonate to 60 to 80% by weight of polyvinyl chloride (PVC). Here, other synthetic elements such as glass fiber or carbon fiber may be included as impurities.

By varying the mixing ratio of polyvinyl chloride and polycarbonate resins below, the experiments were carried out for the breakdown pressure, the mechanical properties, and the conductivity.

Polycarbonate compounding ratio (%) 0 10 12 14 16 18 Breaking pressure
(kgf / mm ² 20 ℃) 1.1 3.8 7.2 7.5 7.9 8.5

As can be seen from Table 1, the breakdown pressure increases as the polycarbonate resin compounding fold increases, but it can be seen that the compounding pressure decreases rapidly when the compounding ratio is 10%.

In another embodiment, pellets were prepared by uniformly mixing polyvinyl chloride and polycarbonate with a mixer and then adding glass fibers or carbon fibers in an extruder. At this time, polyvinyl chloride and polycarbonate were introduced into the powder injector, and glass fibers or carbon fibers were added in an amount of 2 to 8% by weight of the final product using the filler injector separately.

Furtherance Synthetic Resin (%) 77 Polycarbonate resin (%) 11 16 Glass fiber (%) 2 4 6 8 3 5 7 Properties The tensile strength
(kgf / mm ² 20 ℃) 1.8 5.2 6.9 10.1 4.0 6.0 8.4 Elongation (%) 1.9 1.6 1.2 0.5 1.7 1.5 0.8

Furtherance Synthetic Resin (%) 77 Polycarbonate resin (%) 11 16 Carbon fiber (%) 2 4 6 8 3 5 7 Properties The tensile strength
(kgf / mm ² 20 ℃) 3.1 4.8 6.3 9.3 2.8 5.1 7.6 Volume specific resistance (Ωmm) 93.0 *
10 ² 25.4 *
10 ² 12.7 *
10 ² 5.2 *
10 ² 76.6 *
10 ² 20.1 *
10 ² 9.3 *
10 ²

As can be seen from Table 2, tensile strength increases with increasing glass fiber, and elongation decreases with increasing glass fiber, but when the glass fiber is 2% by weight or less, the tensile strength drops sharply and when glass fiber is 7% by weight or less It can be seen that the elongation is sharply lowered.

In addition, as can be seen in Table 3, tensile strength increases with increasing carbon fiber, and volume specific resistance decreases with increasing carbon fiber, but when the carbon fiber is less than 3% by weight, the volume specific resistance rapidly increases and the conductivity decreases sharply. Able to know.

According to the pipe manufactured by synthesizing polycarbonate to polyvinyl chloride as described above, it is possible to provide a pipe having high strength and excellent durability according to the synthesis of polycarbonate in addition to the advantages of the existing polyvinyl chloride.

In addition, the pipe according to the present invention can be produced by mixing polycarbonate in a predetermined ratio to chlorinated vinyl chloride-based resin (CPVC) to produce a pipe having high strength transparency. In this case, the polyvinyl chloride is a chlorinated vinyl chloride resin having a chlorine content of 60 to 70% by weight, an acrylic copolymer latex having a chlorine content of 30 to 40% by weight, and a conventional molding additive (e.g., a heat stabilizer, Transparent CPVC raw materials, including safety aids, lubricants, processing aids, antioxidants, and pH adjusters.

For example, the acrylic copolymer latex may be an acrylate monomer having a glass transition temperature of the homopolymer of −140 or more and less than 30 ° C., a radical polymerizable monomer having a refractive index of 1.3 to 1.4 of the homopolymer, and a multi-tube. It is preferable that it is formed by mixing and copolymerizing a functional monomer.

Here, as the acrylate monomer, methyl acrylate, ethyl acrylate, n-butyl methacrylate, isopropyl acrylate, or the like may be used.

The polymerizable monomer (monomer) is added to the acrylic copolymer latex to have a refractive index of 1.3 to 1.4, dichloro propyl methacrylate (dichloro propyl methacrylate) and the like can be used.

The polyfunctional monomer is for crosslinking the acrylic copolymer latex, to improve the impact resistance of the pipe of the present invention or to prevent the adhesion of the copolymer latex particles during the manufacturing process, for example, trimethylpropane triacrylate (TMPTA) Can be used

1 is an enlarged view showing a CPVC and a polycarbonate composite transparent joint and its configuration according to an embodiment of the present invention.

2A to 2D are views for explaining a construction method of the CPVC and the polycarbonate composite transparent joint shown in FIG. 1. 3 is a perspective view showing a transparent CPVC and polycarbonate composite water and sewage pipe to which the CPVC and polycarbonate synthetic transparent fittings shown in FIG. 1 are applied, and FIG. 4 is a view of the CPVC and polycarbonate synthetic transparent fittings shown in FIG. 1. As an application example, an enlarged cross-sectional view showing that an ultraviolet coating layer is formed on an outer surface of a tube, and FIG. 5 is an enlarged view showing an ultraviolet coating layer, a marking seating groove, and a marking part as another application example of the CPVC and polycarbonate composite transparent joint tube shown in FIG. It is a cross section.

As shown in FIG. 1, the CPVC and polycarbonate composite transparent joints of the present invention are manufactured using transparent CPVC and polycarbonate composite raw materials, and are manufactured based on a conventional synthetic pipe piping member manufacturing technique including injection molding. Can be produced.

CPVC and polycarbonate composite transparent joint of the present invention is a transparent CPVC and polycarbonate composite raw material to be described below, the marking portion 200, UV coating layer 500 (see Fig. 4), the marking portion seating groove 600 (Fig. It is manufactured to have more constituent features such as 5).

The CPVC and the polycarbonate composite transparent joint pipe means any one joint pipe selected from the joint pipe group 100 mentioned in the above specification or a molded article having a corresponding function.

That is, according to the purpose of use or shape of the pipe, for example, CPVC and polycarbonate composite transparent pipe of the present invention is a straight pipe connection pipe 110, English T-shaped pipe 120, English Y-shaped pipe (130) ), Elbow 90 ㅀ pipe 140, elbow 45 ㅀ pipe 150, and other shapes (cross-shaped, English U-shaped: may be any one of the joint pipe not shown).

CPVC and polycarbonate composite transparent joint pipe of the present invention, such a molded fitting of the present invention is formed in accordance with the above standard with a transparent CPVC and polycarbonate composite raw material, the pipe body 101 having a hollow so as to communicate with the pipe according to the standard, and At least one pipe joint portion 102 formed integrally with the tubular body 101 to connect the pipes in communication.

For example, in the case of the straight pipe joint 110 of the present invention, the CPVC and the polycarbonate composite transparent pipe, pipe joints 112 are formed on both sides of the tubular socket 111, which will be described in detail below. Marking unit 200, UV coating layer, it can be manufactured to have a configuration of the marking portion mounting groove. In the case of other joint pipes (120, 130, 140, 150) other than the straight pipe connection type, the corresponding pipe body and pipe joint part are also formed corresponding to the straight, English letter type, curved type and cross type, and also the marking part, UV coating layer, marking The seating recess is provided.

Transparent CPVC and polycarbonate composite raw materials for forming the pipe body 111 and the pipe joint portion 112 of the CPVC and polycarbonate composite transparent joint of the present invention is a chlorinated vinyl chloride resin having a chlorine content of 60 to 70% by weight; It is composed of an acrylic copolymer latex having a chlorine content of 30 to 40% by weight and an ordinary molding additive (eg, a heat stabilizer, a safety aid, a lubricant, a processing aid, an antioxidant, a PH regulator, and the like).

It is preferable that the average resin particle diameter of the latex of the said acrylic copolymer has a size of 100-130 nm so that CPVC and polycarbonate synthetic transparent joints of this invention have refractive index similar to water (for example, refractive index 1.3-1.4). Through this, the transparency of the refractive index desired in the present invention can be provided to the pipe bodies 101 and 111 and the pipe joints 102 and 112 of the CPVC and the polycarbonate synthetic transparent joint pipe.

In particular, the marking portion 200 is formed on the pipe joints 102 and 112 of the present invention CPVC and polycarbonate composite transparent joint pipe.

The marking part 200 is a nail or the like for adjusting the coupling direction or angle of the CPVC and the polycarbonate composite transparent joint pipe to be coupled to the pipe or the pipe assembly without having to carry a separate writing tool such as an oily sign pen at the piping construction site. Scraping is used to temporarily form scratch marks 201 such as symbols, letters, numbers, lines, and the like.

For reference, each of the plastic pipes 50, 51, 52, 53 (see FIG. 2A or FIG. 2B) applicable to the present invention or most of the water supply and sewage pipes is a product code, a product name along the same line of any one of its pipe longitudinal directions. The straight product information line 55 (see FIG. 2A or FIG. 2B), such as standard, material, insurance information, and line marking, is printed in advance.

The straight product information line 55 is used as a reference line to perform marking on the marking portion 200.

1, 2A, and 2B, the marking part 200 is extended along the circumferential direction of the pipe joint part 102 at a portion of the outer circumferential surface of the pipe joint part 102 so as to have a smaller width than the pipe joint part 102 ( width of the ring).

The marking part 200 is for marking the scratch mark 201 due to indentation or heat deformation by scratching with nails, sharps, or the like, and may be configured with a scratch scratch printing layer or a heat sensitive label.

Here, a scratch scratch printing or a scratch off ink, which is a form of the marking unit 200, is formed by directly printing the pipe joint 112 using an industrial printer or an offset printer. Subsequently, when the worker scratches the scratched print layer with a nail or the like, a scratch mark 201 corresponding to the scratched portion is formed as compared to the unscratched portion and may be visually identified.

The heat-sensitive label, which is another type of the marking part 200, is formed by applying a pressure-sensitive adhesive for a sticker on the bottom of the heat-sensitive paper to form a label, and then wraps a portion of the pipe joint part 112 to surround an outer circumferential surface thereof. Subsequently, when a worker scratches the upper surface of the heat sensitive label by applying a force to the nail, the white color, which is the color of the label paper, is changed to black according to the temperature change of the scratched portion, so that a scratch mark 201 is formed, which can also be visually identified. .

Hereinafter, the construction method of the CPVC and polycarbonate composite transparent joint according to the present invention will be described in detail.

First, a general pipe and fitting pipe construction method using the present invention will be described.

Workers apply solvent cement in the same way as conventional pipe piping to sequentially join pipes with CPVC and polycarbonate composite transparent joints. At this time, since the pipe joint 112 corresponding to the coupling portion between the pipe and the CPVC and the polycarbonate composite transparent joint is transparent, the squeeze-out state is evenly spread on the adhesive base of the applied solvent cement. The operator can visually check the presence of voids such as voids or residual bubbles, and minimize the coupling error.

As shown in FIG. 2A, the present invention requires precise coupling directions when the one pipe assembly T and the other pipe assembly U are coupled to each other, and the solvent cement coating work and the piping work are divided into the following construction environments. Work construction can be done.

That is, one side pipe assembly (T) is composed of one side pipe (51, 52) and the corresponding CPVC and polycarbonate composite transparent joint pipe (105, 106).

Subsequently, the other side pipe assembly (U), which consists of the other pipe 50, the corresponding CPVC and the polycarbonate composite transparent joint pipe 107, the head pipe 53, and the sprinkler head 60, is a pipe of the one side pipe assembly T. There is a case where piping is required depending on the direction.

In this case, since the solvent cement is almost impossible to dismantle once used, the insertion of the other pipe 50 of the other pipe assembly U to the pipe joint 102 of the CPVC and polycarbonate composite transparent seam 105. It is required that the engagement angle be precisely adjusted (g).

To this end, the operator adjusts the insertion coupling angle by rotating the other piping assembly (U) from side to side while performing the temporary coupling (f) between the other pipe 50 and the CPVC and the polycarbonate composite transparent joint tube 105 (g). )

As shown in FIG. 2B, which enlarges circle A of FIG. 2A, the operator then places the other pipe 50 at the marking portion 200 of the pipe joint 102 of the CPVC and polycarbonate composite transparent seam 105. The scratch mark 201 is formed by scratching the point indicated by the linear product information line 55 of the reference point, that is, the point where the linear product information line 55 and the marking unit 200 intersect with a nail.

As shown in FIG. 2C, the operator pulls the other pipe 50 from the CPVC and polycarbonate composite transparent seam 105 (h), so that one pipe assembly T and the other pipe assembly U are separated. . Thereafter, the worker is applied to the solvent cement 300 and dried in accordance with a predetermined humidity and time conditions in a state suitable for solvent fusion construction.

As shown in FIG. 2D, the operator inserts the end of the other pipe 50 toward the solvent cement 300 into the pipe joint 102 of the CPVC and the polycarbonate composite transparent pipe 105, and then the marking part. The scratch mark 201 of 200 and the straight product information line 55 of the other side pipe 50 are coupled to each other. Through this, unlike the conventional construction method, the operator can accurately and accurately combine the scratch mark 201 and the straight product information line 55 while watching. Upon hardening of the solvent cement 300, the other side pipe 50 and the CPVC and polycarbonate composite transparent joint tube 105 are combined to allow fluid to communicate.

As shown in FIG. 3, the pipe piping system 400 for water and sewage may be configured using the CPVC and the polycarbonate composite transparent joint pipe of the present invention having the marking part 200.

That is, when using the marking unit 200, as described above, the CPVC and polycarbonate composite transparent joint pipe of the present invention is a worker in the solvent fusion construction environment of the pipes 56, 57 are fixed by the solvent cement (300) It can minimize the work mistake of the operator and make it easy to perform the high quality pipe construction.

As illustrated in FIG. 4, the application example of the present invention is described in that the CPVC and polycarbonate composite transparent joints are hollow tubular bodies 111 formed of transparent CPVC and polycarbonate synthetic raw materials, and such tubular bodies 111. At least one pipe joint part 112 that is integrally formed to connect the pipes in communication with each other, the UV coating layer 500 formed on the outer surface of the tube body 111 and the pipe joint part 112, and the pipe joint part. The marking part 200 is formed in the circumferential direction on the outer surface of the UV coating layer 500 based on the reference numeral 112.

The UV coating layer 500 is formed of a conventional coating agent and a sunscreen (eg Tinuvin 1130), and is formed by coating the outer surface of the tube body 111 and the pipe joint 112.

UV coating layer 500 is preferably composed of 99.9 to 97.0% by weight of the coating agent, 0.1 to 3.0% by weight of the sunscreen.

The sunscreen effect is generated by adding 0.1% by weight of the sunscreen to the coating, and the UV protection effect is increased when the ratio of the weight% is increased, but the coating peeling occurs when containing 3.0% by weight of the sunscreen. As it can be seen that the most preferred content of the sunscreen is 3.0% by weight.

The CPVC and polycarbonate composite transparent tube of the present invention can prevent photolysis and corrosion more effectively through the UV coating layer 500, and maintain the life of the fitting product even if exposed to UV light for a long time during the load management process. You can do it.

That is, the ultraviolet coating layer 500 absorbs ultraviolet rays first before the ultraviolet rays reach the plastic surface such as CPVC and polycarbonate composite transparent joint tube, thereby preventing the ultraviolet rays, and free radicals already formed by photolysis are chained together. It is possible to satisfy all of the healing functions that destroy the reactivity of free radicals so as not to cause a reaction.

In addition, as shown in Figure 5, in another application of the present invention, in order to prevent the marking portion 200 protrudes out of the CPVC and polycarbonate composite transparent joint pipe by the marking portion thickness to be damaged, the marking portion mounting groove It is preferable to form (600) further.

For example, the marking part mounting groove 600 is formed to be recessed at the outer surface of each pipe joint part 112 to seat the marking part 200.

In this case, the CPVC and polycarbonate composite transparent pipe according to another application of the present invention is formed of a hollow tube body 111 formed of a transparent CPVC and polycarbonate composite raw material, and integrally formed in such a tube body 111 to communicate the pipe. At least one pipe joint 112 and a marking part mounting groove 600 formed along the circumferential direction of the pipe joint 112 at a portion of the outer circumferential surface of each pipe joint 112, and the tube ( 111, the UV joint layer 500 formed on the outer surface of the pipe joint 112, the marking portion mounting groove 600 and the outer surface of the UV coating layer 500 on the marking portion mounting groove 600. It includes a seating marking 200.

Since the marking part 200 is located in the marking part seating groove 600, it is possible to produce an outer surface of a relatively smooth and smooth fitting pipe, and the outer portion of the marking part 200 in the process of loading the fitting pipe or the like. There is an advantage that can prevent the local damage or tampering.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

50, 51, 52, 53, 56, 57: pipe 55: product information line
101, 111: pipe 102, 112: pipe joint
200: marking unit 201: scratch mark
300: solvent cement 400: water and sewage piping system
500: UV coating layer 600: Marking part seating groove

Claims (6)

delete delete 60 to 80% by weight of polyvinyl chloride, and 10 to 20% by weight of polycarbonate includes a synthetic material,
The polyvinyl chloride is a transparent CPVC raw material including a chlorinated vinyl chloride resin having a chlorine content of 60 to 70 wt% and an acrylic copolymer latex having a chlorine content of 30 to 40 wt%,
The pipe further includes a transparent joint pipe having a pipe body and a pipe joint part,
The pipe joint portion, characterized in that the marking portion is formed to extend in the circumferential direction of the pipe joint portion to have a ring shape in order to scratch the scratch mark without a separate writing tool.
The method of claim 3, wherein
And said marking portion is formed by a scratched print layer or a heat sensitive label.
The method of claim 3, wherein
The outer surface of the pipe and the pipe joint portion, characterized in that the UV coating layer consisting of 99.9 ~ 99.0% by weight of the coating agent, 0.1 to 3.0% by weight of the sunscreen agent is further formed.
The method of claim 3, wherein
The pipe joint portion 112 is characterized in that the pipe mounting portion recessed in the outer surface outside the pipe joint portion to seat the marking portion 200 is further characterized in that the pipe is formed.

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