KR102553866B1 - A decorative piping and Manufacturing method thereof - Google Patents

Abstract

The piping according to the present invention is used to cover the rim of a seat, especially a car seat, and has a certain stiffness, elasticity, and abrasion resistance, while manufacturing it in a continuous process, thereby significantly reducing production costs and improving productivity. In particular, by adding titanium oxide and carbon black as fillers in a specific range, mechanical properties such as surface hardness and tensile strength and heat resistance are further improved while maintaining flexibility.

Description

Decorative piping and manufacturing method thereof {A decorative piping and Manufacturing method thereof}

The present invention relates to decorative piping and a method for manufacturing the same, in piping processed to cover the rim of a seat, particularly an automobile seat, while having certain rigidity, elasticity, and abrasion resistance, and manufacturing the piping in a continuous process to significantly reduce production costs and improve productivity. It relates to piping for seat decoration of a vehicle that can be used and a manufacturing method thereof.

In general, a vehicle seat provided in the interior of a vehicle and formed to seat an occupant is formed as a cover covering the outside of a foamed foam pad, and has a structure in which the cover is fixed to the foam pad side.

In addition, the cover forms a seat by connecting several sheets of leather or synthetic leather to each other, and piping may be used to strengthen the connection portion.

The piping is a structure in which a nonwoven fabric is attached to the inner surface of the fabric in an overlapped state by an adhesive, and a support is placed in the center of the nonwoven fabric to wrap the fabric, as in known Patent Registration No. 10-0970320, and connects the cover through this. I'm letting go.

However, in the case of known registered patents, in order to adhere a thin and weak nonwoven fabric onto a fabric, each one has to go through a separate high-cost process, which takes a long time and lowers the process yield, thereby increasing the cost. There was a problem.

That is, in the conventional case, there is a problem in that the process yield is very low because the fabric and the nonwoven fabric are cut to a certain size and then completed by a worker bonding them again using an adhesive.

Republic of Korea Patent No. 10-0970320 (July 7, 2010)

The present invention has been made to solve the above problems, and in detail, in piping processed to cover the rim of a seat, especially a car seat, while having a certain stiffness, elasticity, and abrasion resistance, it is manufactured in a continuous process, thereby reducing production costs. It is an object of the present invention to provide a piping for decorating the seat of a vehicle and a method for manufacturing the same, which can significantly reduce and improve productivity.

The present invention relates to decorative piping and a manufacturing method thereof.

One aspect of the present invention,

a) preparing a composition by mixing a thermoplastic resin, a first plasticizer, magnesium-aluminum hydroxycarbonate, a lubricant, a second plasticizer, an adhesive polymer, and a filler;

b) extruding and primary molding the composition;

c) cooling the extruded composition at 10 to 25° C. for 10 to 20 seconds;

d) rolling the cooled composition by applying a pressure of 2 to 10 MPa; and

e) cutting the rolled composition and performing secondary molding;

It relates to a method for manufacturing decorative piping comprising a.

In the present invention, the thermoplastic resin is selected from polyvinyl chloride, thermoplastic polyurethane, polyvinylidene chloride, polyvinylidene fluoride, chlorinated polyvinyl chloride, polyvinyl alcohol, polyvinyl acetate, polyvinyl butyrate, polyethylene and polypropylene. Including any one or a plurality of being,

The first plasticizer includes one or more selected from diisononyl phthalate, diisodecyl phthalate, diandecyl phthalate, dibutyl phthalate, diisobutyl phthalate and diisooctyl phthalate,

The lubricant includes any one or a plurality of stearic acids selected from zinc stearate, calcium stearate, barium stearate and magnesium stearate, and the second plasticizer is epoxidized soybean oil.

In addition, the adhesive polymer includes any one or a plurality selected from ethylene butyl acrylate copolymer, ethylene vinyl acetate copolymer and polyethylene oxide, and the filler is selected from titanium oxide, carbon black, calcium carbonate, talc and silica It is characterized in that any one or plural.

Another aspect of the present invention is a decorative piping manufactured by the decorative piping manufacturing method, wherein the Shore A hardness measured by ASTM D 2240 is 70 or more, and the tensile strength and elongation measured by ASTM D 638 are 12 MPa or more and 350%, respectively. It is characterized by more than

The piping according to the present invention is used to cover the rim of a seat, especially a car seat, and has a certain stiffness, elasticity, and abrasion resistance, while manufacturing it in a continuous process, thereby significantly reducing production costs and improving productivity. In particular, by adding titanium oxide and carbon black as fillers in a specific range, mechanical properties such as surface hardness and tensile strength and heat resistance are further improved while maintaining flexibility.

Hereinafter, the decorative piping and its manufacturing method according to the present invention will be described in more detail by way of specific examples. However, the specific examples introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art.

Therefore, the present invention may be embodied in other forms without being limited to the specific examples presented below, and the specific examples presented below are only described to clarify the spirit of the present invention, but the present invention is not limited thereto.

At this time, if there is no other definition in the technical terms and scientific terms used, they have meanings commonly understood by those of ordinary skill in the art to which this invention belongs, and will unnecessarily obscure the gist of the present invention in the following description. Descriptions of possible known functions and configurations are omitted.

Also, the singular forms used in the specification and appended claims may be intended to include the plural forms as well, unless the context dictates otherwise.

The decorative piping manufacturing method according to the present invention,

a) preparing a composition by mixing a thermoplastic resin, a first plasticizer, magnesium-aluminum hydroxycarbonate, a lubricant, a second plasticizer, an adhesive polymer, and a filler;

b) extruding and primary molding the composition;

c) cooling the extruded composition at 10 to 25° C. for 10 to 20 seconds;

d) rolling the cooled composition by applying a pressure of 2 to 10 MPa; and

e) cutting the rolled composition and performing secondary molding;

can include

In the present invention, step a) is for preparing a piping composition, and the composition may include a thermoplastic resin, a first plasticizer, magnesium-aluminum hydroxycarbonate, a lubricant, a second plasticizer, an adhesive polymer, and a filler .

In the present invention, the thermoplastic resin is a main component of the piping composition and can be used without limitation as long as it is a material that is ductile through heating and increases moldability.

Examples of the thermoplastic resin include polyvinyl chloride, thermoplastic polyurethane, polyvinylidene chloride, polyvinylidene fluoride, chlorinated polyvinyl chloride, polyvinyl alcohol, polyvinyl acetate, polyvinyl butylate, polyethylene and polypropylene. These may be used alone or in combination of two or more.

Preferably, a polyvinyl chloride resin may be included as the thermoplastic resin. In this case, excellent cushion feeling, high elongation and durability can be secured at the same time.

The polyvinyl chloride (PVC) resin includes a vinyl chloride homopolymer as well as a copolymer obtained by copolymerizing a vinyl chloride monomer with another monomer. vinyl monomers or mixtures thereof.

The copolymer may be selected from those having a vinyl chloride monomer content of 50% by weight or more, preferably 70% by weight or more. Examples of the copolymer include, but are not limited to, a copolymer of vinyl chloride and vinyl acetate, a copolymer of vinyl chloride and acrylic acid ester, and a copolymer of vinyl chloride and ethylene. As a product commercialized with such a copolymer, P-1000 of Hanwha Petrochemical Co., Ltd. in Korea can be usefully used. Such a polyvinyl chloride (PVC)-based resin is not particularly limited, but a polymerization degree of 500,000 or less, for example, 500 to 50,000 can be used.

In the present invention, the thermoplastic resin may be included in 50 to 80% by weight based on 100% by weight of the total composition. When the thermoplastic resin is added in less than the above range, the elastic recovery of the composition may decrease, and when the thermoplastic resin is added in excess of the above range, mechanical properties of the composition, particularly tensile strength, surface hardness, and the like may decrease.

In the present invention, the plasticizer is added to dissolve and soften a thermoplastic resin, particularly a polyvinyl chloride resin, and may be added separately as a first plasticizer and a second plasticizer.

The first plasticizer is added to increase the moldability of the non-plasticized polyvinyl chloride resin, and can be used without limitation as long as it can achieve the above purpose. These plasticizers may mainly use phthalic acid esters, but may also use phosphoric acid esters or fatty acid esters.

Specifically, the first plasticizer may be phthalic acid esters such as diisononyl phthalate, diisodecyl phthalate, diandecyl phthalate, dibutyl phthalate, diisobutyl phthalate, and diisooctyl phthalate; phosphoric acid esters such as tricresyl phosphate, trixylyl phosphate, and triphenyl phosphate; fatty acid esters such as di-2-ethylhexyl adipate and di-2-ethylhexyl sebacate; and the like, and commercialized products include, for example, PA-930 of LG Chem in Korea.

More preferably, diisononyl phthalate may be included as the first plasticizer. The diisononyl phthalate is an oily liquid having excellent viscosity stability and is a plasticizer suitable for further increasing moldability by changing polyvinyl chloride into a sol form.

The amount of the plasticizer added is not particularly limited, but may be included in an amount of 30 to 50% by weight based on 100% by weight of the total composition. When the first plasticizer is added in an amount less than the above range, moldability of the composition and miscibility with other components may be greatly reduced, and when the first plasticizer is added in an amount exceeding the above range, mechanical properties such as surface hardness and tensile strength may be deteriorated.

In the present invention, the magnesium-aluminum hydroxycarbonate (Magnesium Aluminum hydroxy carbonate) is to increase the thermal stability of the composition together with a lubricant to be described later, to improve processability and bleeding property (a phenomenon that does not bleed out to the product surface), etc. add to make

The magnesium-aluminum hydroxycarbonate is a base component of a heat-resistant stabilizer for heat stability, which replaces conventional lead (Pb)-based compounds to improve heat stability as well as particularly bleeding properties.

The magnesium-aluminum hydroxycarbonate is not limited to a manufacturing method. For example, after suspending magnesium hydroxide and aluminum hydroxide in water, adding sodium carbonate therein, maintaining and reacting at an appropriate temperature (eg, 70 to 100 ° C.) A prepared one may be used, but is not limited thereto.

The magnesium-aluminum hydroxycarbonate is preferably included in an amount of 1 to 10% by weight based on 100% by weight of the total composition. When magnesium-aluminum hydroxycarbonate is added below the above range, the heat stability and miscibility of the composition may be deteriorated, and when the above range is exceeded, the synergistic effect due to the excessive content is not large and the activity due to the lack of addition of other components may decrease. can

In the present invention, the lubricant is added to increase thermal stability and activity together with the magnesium-aluminum hydroxycarbonate and to prevent initial coloration, in addition to improving processability and at the same time smoothing the surface of the final product and providing gloss to the surface. function to give In addition, the internal lubricant penetrates the inside of the polymer and serves to reduce the viscosity of the melted composition.

The lubricant is not limited to the type as long as it can achieve the above physical properties, but it is preferable to use a lead-free type that is harmless to the human body and environmentally friendly to satisfy environmentally friendly characteristics.

As the lubricant, for example, it is preferable to specifically include a stearic acid metal salt such as zinc stearate, calcium stearate, barium stearate, and magnesium stearate as the stearate, and the amount of these is not limited, but 1 to 10 of 100% by weight of the total composition It is preferable to include the weight % because it can satisfy the above-mentioned characteristics.

In the present invention, the second plasticizer may include the epoxy functional group in the composition through an epoxidation process in a subsequent extrusion process by wrapping the epoxy functional group around the thermoplastic resin softened by the first plasticizer.

Preferably, epoxide soybean oil is used as the second plasticizer. In this case, the epoxidized soybean oil may preferably have an epoxidation index (EI) of 1.5 or more. Here, the epoxidation index means the ratio of the remaining double bonds that do not react to the double bonds epoxidized by the epoxidation reaction of soybean oil, and when the epoxidation index is less than 1.5 or the epoxidation itself is not performed, the hardness increases. As a result, the plasticization efficiency may be greatly reduced.

The second plasticizer is preferably added in an amount of 1 to 10% by weight based on 100% by weight of the total composition. When the second plasticizer is added in an amount less than the above range, epoxidation of the thermoplastic resin is not properly performed, and when the second plasticizer is added in an amount exceeding the above range, mechanical properties of the composition may deteriorate.

In the present invention, the adhesive polymer secures the viscosity control and dispersion stability of the composition, and at the same time, when mixed with a filler to be described later, is bonded to the surface of the filler particles to prevent the filler particles from aggregating with each other, thereby further improving the mechanical properties of the composition. can play a role

These adhesive polymers may mainly include water-soluble natural polymers or synthetic polymers, and examples thereof include xanthan gum, guar gum, gum arabic, tragacanth gum, galactan, and carob. Gum, karaya gum, carrageenan, gum acacia, pectin, kannan, quince seed (quince), alcoloid (brown algae extract), starch (derived from rice, corn, potato, wheat, etc.), glycyrrhizin, alginin, Sodium alginate, collagen, alginate, gelatin, Furcellaran, carrageenan, casein, locust bean gum, Pectin, chitosan, albumin, dextran, succinoglucan, bluelan, tragacanthin, hyaluronic acid, pectin, alginic acid, agar ), water-soluble natural polymers such as galactomannans, beta-cyclodextrin, amylase, casein, and chitosan, polyethylene oxide (PEO), polyethylene glycol (PEG), polyvinylpyrroly Don (PVP), polyvinyl alcohol (PVA), polyacrylic acid (PAA), N-(2-hydroxypropyl)methacrylamide (HPMA), divinyl ether-maleic anhydride (DIVEMA), polyphosphate, Polyphosphazene, methylcellulose, methylethylcellulose, ethylcellulose, microcrystalline cellulose, hydroxyethylcellulose, hydroxybutylmethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose, hydroxypropyl Water-soluble such as methyl cellulose stearoxy ether, carboxymethyl hydroxyethyl cellulose, alkyl hydroxyethyl cellulose, nonoxynyl hydroxyethyl cellulose, cellulose sodium sulfate, methyl cellulose, methyl ethyl cellulose, ethyl cellulose, and carboxymethyl cellulose (CMC) and synthetic polymers, which may be used alone or in combination of two or more.

The adhesive polymer is preferably included in an amount of 1 to 10% by weight based on 100% by weight of the total composition. When the adhesive polymer is added in an amount less than the above range, the dispersibility of the filler particles to be described later may decrease, resulting in defects in the composition. When the adhesive polymer is added in an amount exceeding the above range, mechanical properties may decrease due to increased ductility of the composition.

In the present invention, the filler is added to increase the mechanical properties of the composition, particularly heat resistance, surface hardness, tensile strength, etc., and it is preferable to use mainly inorganic fillers.

Examples of the inorganic filler include titanium oxide, carbon black, calcium carbonate, talc and silica, and one or more of the inorganic fillers may be used in combination according to their characteristics.

The titanium oxide is mainly used as a pigment, and is also used as a matting agent for polymers. In addition, it decomposes various bacteria and pollutants through oxidation and reduction reactions using light as an energy source, and is harmless and safe to the human body. Representative functions of titanium oxide include UV blocking performance, antibacterial performance, air pollutant decomposition function, and self-cleaning function.

The carbon black is used as a conductive material in addition to a pigment, and has an effect of increasing electrical and thermal properties and improving surface hardness.

Since the carbon black is mainly composed of carbon, it may be named by various names depending on the manufacturing or reforming method, molecular structure, and the like. Examples of such conductive carbon include graphite, hard carbon, soft carbon, carbon fiber, carbon nanotube, acetylene black, Ketjen black, graphene, and fullerene. In addition to the carbon black, one or more of the above components may be included. good night.

The calcium carbonate (Calcium Carbonate) is added to increase the mechanical properties of the composition and at the same time adjust elasticity such as _contraction and expansion. It can exist as calcite, berth, limestone, chalk, glacial tin, clam shell, egg shell, coral, etc. The calcium carbonate is generally a colorless crystal or white solid, has a specific gravity of 2.93, can be decomposed at 825 ° C, and when heated, carbon dioxide (CO ₂ ) is generated and quicklime can be obtained.

The talc (Talc) is added to increase the mechanical properties of the composition similar to the calcium carbonate and to control elasticity such as contraction and expansion at the same time, and is generally a mineral belonging to the monoclinic system. It is Mg ₃ Si ₄ O ₁₀ (OH) ₂ and forms a plate-like or fibrous aggregate. As a layered mineral, it has a hardness of 1.0 and a specific gravity of 2.58 to 2.83. The pure one is white and has a pearl luster, and the shell is complete in one direction. As the softest mineral, it has a sense of touch. When heated, it becomes an amphibole structure at 700 to 900 ° C, a pyroxene structure at 1,000 to 1,200 ° C, and decomposed into monoclinic pyroxene and cristobalite at 1,250 to 1,350 ° C. It may be accompanied by ultramafic rocks or formed by contact metamorphism of siliceous dolomite.

The silica controls the viscosity and flowability of the composition, improves adhesion, and serves to supplement workability by reducing shrinkage during curing, the chemical formula is SiO ₂ , found in sand or quartz, etc., cell walls of diatoms also distributed in It is the main component of glass and concrete, and is a mineral that occupies most of the earth's crust.

More preferably, a mixture of titanium oxide and carbon black is used as the filler. Since the titanium oxide increases the mechanical properties of the composition and at the same time has quenching properties, it has an effect of preventing glare, but has a problem in that the breaking behavior is poor at a certain strength or more. However, when carbon black is used together, mechanical properties and thermal properties are supplemented, and since the hardness is very high, the tensile strength and surface hardness can be further improved.

Specifically, the filler preferably has a composition ratio of titanium oxide and carbon black in a weight ratio of 5 to 7:3 to 5. If it is out of the above range, the above-mentioned disadvantages may be noticeable, and in particular, when excessive carbon black is added, formability is greatly reduced, and cracks may occur in the molded composition during a cooling process to be described later.

The average particle diameter of the filler is not limited, but is preferably 10 to 100 μm because agglomeration between fillers can be suppressed while securing a specific surface area. In addition, it is preferable to remove irregularities on the surface of the filler and reduce cohesiveness through milling such as ball milling or high frequency milling, if necessary.

The filler is preferably included in an amount of 10 to 25% by weight based on 100% by weight of the total composition. When the filler is added below the above range, the above-described synergistic effect of mechanical properties is insufficient, and when the above range is exceeded, aggregation between fillers increases and the viscosity of the composition increases, resulting in poor moldability.

In addition, the composition may further include various additives such as a glidant, an antioxidant, an external lubricant, a pigment, an impact modifier, a light stabilizer, and a flame retardant, if necessary. At this time, the addition amount of the additives may be freely adjusted within a range that does not impair the object of the present invention.

As the fluidizing agent, for example, methyl methacrylate as a main component, and as an auxiliary component, copolymerization is possible with the main component and free radicals, for example, ethyl acrylate, hydroxyethyl methacrylate, n-butyl methacrylate, Isobutyl acrylate, isobutyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, ethylhexyl acrylate, ethylhexyl methacrylate, n-octyl acrylate, n-octyl methacrylate, decyl acryl A methyl methacrylate-based resin copolymerized with a monomer having a double bond, such as late, decyl methacrylate, dodecyl acrylate, dodecyl methacrylate, stearyl acrylate, or stearyl methacrylate, may be used. It is not limited.

As the antioxidant, for example, at least one selected from the group consisting of diketone compounds, butylated hydroxy toluene (BHT), and diphenyl isodecyl phosphite (DPDP) is preferred. , but is not limited thereto.

The external lubricant may include, for example, a polymer wax such as polyethylene wax (PE-Wax) and paraffin wax, but is not limited thereto.

The pigment is not particularly limited and includes organic pigments and inorganic pigments. For example, the pigment may include organic pigments such as azo-based, phthalocyanine-based, threnic-based, and dye lake-based pigments; Inorganic pigments, such as an oxide type, a molybdenum chromate type, and a ferrocyanide type, etc. can be used. A specific example of the oxide type is rutile type titanium dioxide (R-TiO ₂ ) as a white pigment, and the like, and in addition, color pigments implementing red, blue, etc. may be added.

Examples of the impact modifier include acrylics such as methacrylate-butadiene-styrene (MBS), acrylic, and acrylonitrile-butadiene-styrene (ABS); Ethylene-based plasticizing polymers such as chlorinated poly ethylene (CPE) and ethylene vinyl acetate (EVA); There is an inorganic type in which calcium carbonate is coated with stearin, and the present invention is not limited thereto.

As the light stabilizer, for example, salicylic acid ester-based, benzophenone-based, benzotriazole-based, cyanoacrylate-based substances having UV absorbing properties may be used, but the present invention is not limited thereto, and the flame retardant, for example Halogen-based compounds may be used, but are not limited thereto.

It is important for the formulation of the compositions to have the same physical properties as the uniform dispersion of components in the composition, which greatly affect the stabilization of the processing process and the quality of products. If there is a difference in the dispersion state, the concentration of the formulation is partially different and it may cause scotch or crosslinking stains, resulting in a difference in various properties or functions aimed at in the present invention. It is preferable to carry out for 15 to 20 minutes at a temperature of.

Next, as in step b), the composition may be extruded to form a linear sheet. At this time, the extrusion molding method is not particularly limited, and may be performed by, for example, calendering, extrusion molding, and the like. In one embodiment of the present invention, extrusion may be carried out at a temperature of preferably 120°C to 140°C, more preferably 130°C.

Next, as in step c), the extruded composition may be cooled at 10 to 25° C. for 10 to 20 seconds. The cooling is to gradually lower the internal temperature of the molded composition to increase the stability of the polymer and impart flexibility.

In general, among polymer resins, polyvinyl chloride cannot be processed by itself, unlike other polymer resins. In particular, dechlorination occurs in which chlorine in the main chain is desorbed by heat or light, and since the mobility of the main chain is insufficient, a light stabilizer, a heat stabilizer, or a plasticizer is mainly added.

Among these, a plasticizer is added to facilitate processability of polyvinyl chloride and to impart flexibility to polymer resin. When the electrical attraction between polyvinyl chloride molecules is loosened by heating, the plasticizer molecules penetrate between polyvinyl chloride molecules to It serves to prevent the proximity of vinyl chloride, and requires a cooling process for a certain time and temperature so that plasticizer molecules can be fixed between polyvinyl chloride.

In step c), it is preferable to cool the extruded composition at 10 to 25° C. for 10 to 20 seconds. When the temperature and time are less than the above ranges, the flexibility of the composition may be insufficient, and when the temperature and time are above the above ranges, plasticizer molecules may not be properly fixed, and flexibility may also be poor.

The cooled composition as described above proceeds with a rolling step by applying a pressure of 2 to 10 MPa as in step d). The step d) is performed to increase the bonding strength between the cooled polymer and the composition, and it is preferable to proceed by applying a predetermined temperature and pressure to the surface of the molded composition.

Specifically, in the step d), the molded composition may be placed between a pair of rollers, and the composition may be pressed by the rollers to stabilize the shape of the sheet. At this time, the temperature or pressure of the roller is not limited, but it is preferable to apply a temperature of 80 to 100 ° C and a pressure of 1 to 3 MPa.

Next, as in step e), the rolled composition is cut and molded secondarily. The secondary molding is a step of forming a kind of pattern pattern by cutting both ends along the longitudinal direction of the linearly primary molded composition or cutting the central part in the longitudinal direction instead of both ends, wherein the pattern pattern has alternating peaks and valleys. It can be cut in a certain shape so as to be repeated, and it is possible to give an aesthetic sense to the user through the pattern pattern.

The present invention may include the decorative piping manufactured as described above. The decorative piping is installed to improve the decorative effect and fixing force between the fabric, non-woven fabric, and leather forming the seat to decorate the end of the seat of the vehicle, and if necessary, the core material having a certain bending stiffness, the Fabric such as fabric, non-woven fabric, or leather provided to cover or fuse the longitudinal surface of the core material is included, and the piping may be provided on the surface of the fabric.

At this time, each component may be bonded with an adhesive or film made of a polymer such as polyester or polyurethane, and the core material or fabric may also be made of a polymer such as polyester, polyurethane, or polyamide.

The piping preferably satisfies a certain level of mechanical properties so as to withstand external forces such as tensile force and frictional force that may be received according to the use of a sheet or the like. Specifically, the piping preferably has a Shore A hardness of 70 or more as measured by ASTM D 2240, and tensile strength and elongation of 12 MPa or more and 350% or more as measured by ASTM D 638, respectively.

Hereinafter, the present invention will be described in more detail by way of Examples and Comparative Examples. However, the following examples are only one example for explaining the present invention in more detail, and the present invention is not limited to the following examples.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the following examples are only one example for explaining a preferred embodiment of the present invention, and the present invention is not limited to the following examples.

The physical properties of the specimens prepared in Examples and Comparative Examples were measured as follows.

(Hardness)

Shore hardness was measured at 3T 10s at 25°C according to ASTM D2240.

(tensile strength and elongation)

According to the ASTM D638 method, after pulling the cross head speed at 200 mm/min (1T) using a test device, U.T.M (manufacturer; Instron, model name: 4466), the point where the specimen was cut was measured. . Tensile strength and elongation were calculated as follows:

Tensile strength (kgf/㎟) = load value (kgf) / thickness (㎜) × width (㎜)

Elongation (%) = [length after extension / initial length] × 100

(Example 1)

52% by weight of polyvinyl chloride (polymerization degree DP 700) as a thermoplastic resin 33% by weight of diisononylphthalate as a primary plasticizer 1% by weight of magnesium-aluminum hydroxycarbonate 1% by weight of stearic acid (CAS No. 57-11-4) as a lubricant 1% by weight 1 wt% of epoxidized soybean oil (CAS No. 64742-81-0) as a secondary plasticizer, 1 wt% of polyethylene oxide (CAS No. 68441-17-8) as an adhesive polymer, and titanium oxide (average particle diameter of 25 ㎛) 11% by weight was put into an extruder, and then extruded by heating and kneading at 200 ° C. Then, it was continuously extruded into a size of 5 cm in width and 1.5 cm in thickness by passing it through a roller heated to 175 ° C.

The extruded composition was cooled at 20° C. for 15 seconds, and then passed through a roller set at 90° C. and 3 MPa to prepare a specimen having a width of 6 cm and a thickness of 1 cm. After cutting the prepared specimen to a length of 15 cm, the physical properties of the specimen were measured.

(Example 2)

Specimens were prepared in the same manner as in Example 1, except that carbon black having the same average particle diameter was used as a filler when preparing the specimen.

(Example 3)

Specimens were prepared in the same manner as in Example 1, except that titanium oxide having an average particle diameter of 25 μm and carbon black were mixed in a weight ratio of 6:4 as a filler.

(Example 4)

Specimens were prepared in the same manner as in Example 1, except that titanium oxide having an average particle diameter of 25 μm and carbon black were mixed in a weight ratio of 4:6 as a filler.

(Comparative Example 1)

Specimens were prepared in the same manner as in Example 1, except that 53% by weight of polyvinyl chloride was added without adding the second plasticizer when preparing the specimen.

(Comparative Example 2)

Specimens were prepared in the same manner as in Example 1 except that 53% by weight of polyvinyl chloride was added without adding an adhesive polymer when preparing the specimen.

(Comparative Example 3)

Specimens were prepared in the same manner as in Example 1, except that the cooling step was not performed during the preparation of the specimen.

[Table 1]

As shown in Table 1, it can be seen that the specimens prepared according to the present invention show excellent values in hardness, tensile strength and elongation. Specifically, Example 3, in which titanium oxide and carbon black were added as fillers in an appropriate composition ratio, showed the best physical properties, and Example 4, in which the amount of carbon black added was more than the standard value, had a relatively increased hardness, but due to an increase in the hardness of the composition Tensile strength and elongation decreased, and in addition, Comparative Example 1 without the addition of the second plasticizer, Comparative Example 2 without the addition of the adhesive polymer, and Comparative Example 3 without the cooling step satisfied the hardness and tensile strength, respectively. It can be seen that the plasticizing effect is decreased and the elongation is relatively decreased.

In the above, preferred embodiments of the present invention have been described, but the scope of the present invention is not limited only to the specific embodiments as described above, and those skilled in the art can appropriately within the scope described in the claims of the present invention. change will be possible.

Claims (8)

a) Any one or more selected from polyvinyl chloride, thermoplastic polyurethane, polyvinylidene chloride, polyvinylidene fluoride, chlorinated polyvinyl chloride, polyvinyl alcohol, polyvinyl acetate, polyvinyl butyrate, polyethylene and polypropylene A first plasticizer containing one or more selected from diisononyl phthalate, diisodecyl phthalate, diandecyl phthalate, dibutyl phthalate, diisobutyl phthalate and diisooctyl phthalate, magnesium- Lubricant containing one or more stearic acids selected from aluminum hydroxycarbonate, zinc stearate, calcium stearate, barium stearate and magnesium stearate, a second plasticizer containing epoxidized soybean oil, ethylene butyl acrylate copolymer, ethylene vinyl acetate Preparing a composition by mixing an adhesive polymer comprising any one or a plurality thereof selected from a copolymer and polyethylene oxide and a filler comprising any one or a plurality thereof selected from titanium oxide, carbon black, calcium carbonate, talc and silica ;
b) extruding and primary molding the composition;
c) cooling the extruded composition at 10 to 25° C. for 10 to 20 seconds;
d) rolling the cooled composition by applying a pressure of 2 to 10 MPa; and
e) cutting the rolled composition and performing secondary molding;
Decorative piping manufacturing method comprising a.
delete delete delete delete delete delete Decorative piping manufactured by the decorative piping manufacturing method according to claim 1, having Shore A hardness of 70 or more as measured by ASTM D 2240, and tensile strength and elongation of 12 MPa or more and 350% or more as measured by ASTM D 638, respectively. Features decorative piping.