KR100838968B1 - A kind of polyester sheet and a manufacturing method thereof - Google Patents

Abstract

The present invention relates to a polyester sheet excellent in light resistance and a manufacturing method thereof, and more particularly, to a polyester sheet formed of a polyester composition containing a composite UV stabilizer as a base sheet, the composite sheet on the base sheet It relates to a polyester sheet having excellent light resistance made of a surface layer formed of an acrylic resin composition containing an ultraviolet light stabilizer and a method for producing the same.

The polyester sheet according to the present invention has little discoloration and is useful as a surface finish sheet material due to less scratches.

Polyester Sheet, Polyacrylic Coating Layer, Light Resistance, Damage Resistance, Surface Finish Sheet

Description

A polyester-based sheet having excellent light resistance and a method for manufacturing the same

1 is a cross-sectional view of a polyester sheet according to a first embodiment of the present invention.

2 is a cross-sectional view of a polyester sheet according to a second embodiment of the present invention.

3 is a cross-sectional view of a polyester sheet according to a third embodiment of the present invention.

4 is a cross-sectional view of a polyester sheet according to a fourth embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: polyester sheet 10: substrate sheet

20: surface layer 30: printed layer

40: adhesive layer 50: primer layer

The present invention relates to a polyester sheet excellent in light resistance and a method for manufacturing the same, and more particularly, to a polyester sheet formed of a polyester composition containing a composite UV stabilizer as a base sheet, It relates to a polyester sheet having excellent light resistance made of a surface layer formed of an acrylic resin composition containing a composite ultraviolet light stabilizer and a method for producing the same.

In general, polyester-based sheets used as polyester-based surface finish sheet has been attracting attention in the market because it is environmentally friendly and excellent post-processability, such as moldability, such as vinyl chloride resin surface finish sheet. However, the polyester surface finish sheet has a problem that light resistance and damage resistance due to the properties of the polyester resin is weak.

In order to solve this problem, a vinyl chloride resin having increased damage resistance by forming a surface treatment layer using a composition containing spherical synthetic resin beads or spherical silica beads that are densely crosslinked to a thermosetting resin on a vinyl chloride resin layer. A technique for sheeting (Korean Patent Publication No. 2002-066647) is known, and an ultraviolet absorbent coating composition for mixing light stabilizers with transparent resins such as epoxy and acrylic resins for improving light resistance (Korean Patent Application No. 1992-013312) Japanese Patent Application No. 1991-040778) and a UV stabilizer-containing resin molded article (Japanese Patent Application No. 1993-320994) molded from a resin composition containing a benzotriazole-based UV stabilizer in a polyester resin and a UV absorbing monomer. To form an ultraviolet absorbent polymer, and coat the film with an ultraviolet stabilizer that is the ultraviolet absorbent polymer. The technology relating to the construction material that generated the polyester (Japanese Patent Application No. 2000-357831) is disclosed.

However, the above conventional techniques still remain unsatisfactory in weather resistance such as light resistance and surface scratch resistance.

The present invention is to solve the problems of the prior art to provide a polyester-based sheet excellent in the light resistance significantly improved light resistance and its manufacturing method.

The present invention provides a polyester-based sheet having excellent light resistance, comprising a polyester base sheet molded from a polyester composition containing a composite UV stabilizer, and a surface layer formed of an acrylic resin composition containing a composite UV stabilizer on the base sheet. It is to provide a manufacturing method.

The above object of the present invention can be achieved by configuring the base sheet and the surface layer with a resin composition containing a composite ultraviolet stabilizer.

The polyester sheet having excellent light resistance of the present invention comprises a polyester base sheet molded from a polyester composition containing a composite UV stabilizer, and a surface layer formed of an acrylic resin composition containing a composite UV stabilizer on the substrate sheet. It is characterized by.

In the polyester sheet having excellent light resistance according to the present invention, a printing layer may be formed on an upper surface of the base sheet.

In the polyester sheet having excellent light resistance according to the present invention, an adhesive layer for increasing adhesion of a surface layer may be formed on an upper surface of the base sheet.

In addition, a polyester-based sheet having excellent light resistance according to the present invention may have a primer layer for increasing adhesive strength when used on the lower rear surface of the base sheet.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 1, FIG. 1 shows a structure in which a surface layer 20 is formed on a polyester base sheet 10 and the base sheet.

The polyester base sheet 10 according to the present invention is composed of a sheet (or film) molded of a polyester composition containing a composite UV stabilizer excellent in light resistance.

The polyester-based base sheet may be made of a single layer or multiple layers, in the case of a multilayer, the base sheet may be laminated or laminated through a thermal plywood process. The thickness of the polyester-based base sheet 10 according to the present invention is preferably in the range of 100 microns (μm) to 700 microns (μm).

The polyester composition containing the composite UV stabilizer for constituting the polyester base sheet 10 according to the present invention is that the composite UV stabilizer is contained in glycol modified polyethylene terephthalate (PET-G). Characterized in that, the composition may further comprise (containing) additives such as antioxidants, lubricants, flame retardants.

The glycol-modified polyethylene terephthalate (PET-G), which is a base synthetic resin used in the present invention, provides a mixture of terephthalic acid (Terephthalic acid: TPA), ethylene glycol (Ethylene Glycol: EG), and cyclohexanedimethanol (CHDM). Polymerized amorphous resin with excellent processability, printability, no deformation due to shrinkage, excellent impact resistance, and no harmful components such as environmental hormones in case of incineration or fire, but generally easily decomposed by heat and oxygen Because of this, it is difficult to process for a long time at high temperature and has a weak light resistance.

Accordingly, in the present invention, in order to solve the above problems of glycol-modified polyethylene terephthalate, the composition is supplemented by adding a compound ultraviolet (UV) stabilizer to have excellent light resistance, and the antioxidant is mixed as a component to be used during or during calendar work. Improved its stability.

The composite ultraviolet (UV) stabilizer constituting the PET-G composition used in the present invention, for example, benzotriazole-based ultraviolet (UV) stabilizer, including hydroxyphenylbenzotriazole, hydride Benzophenone UV stabilizers containing 2-hydroxybenzophenones, Benzoate UV stabilizers containing benzoates, and Cyanoacrylate UV rays containing cyanoacrylates. Two or three or more composite ultraviolet (UV) stabilizers selected from the group of ultraviolet (UV) stabilizers composed of stabilizers and the like are preferable.

Examples of commercially available UV stabilizers include benzotriazole UV stabilizers such as Tinuvin P and Tinuvin 326 from Ciba, Cyasorb UV-531 from Cytec, etc. The same benzophenone ultraviolet (UV) stabilizer, the benzoate ultraviolet (UV) stabilizer like Tinbavin 120 of Ciba, etc. are mentioned.

The composition ratio of the complex UV stabilizer is PET-G 0.3-3 weight part is preferable with respect to 100 weight part of resin. If it is less than the said range, light resistance improvement cannot be expected, and when it exceeds the said range, there exists a possibility that the problem of workability and a product color may arise.

The antioxidant added to the polyester composition containing a composite UV stabilizer for molding the polyester base sheet 10 in the present invention is added to prevent discoloration due to oxygen and heat during the calendar processing of the polyester. This includes, for example, antioxidants such as amines, phenols, phosphites, and the like, and the composition ratio thereof is preferably 0.1 to 1.5 parts by weight based on 100 parts by weight of polyester. If it is less than the above range, yellowing and roll adhesion occur due to decomposition due to oxidation of the polyester during calendering, and if it exceeds the above range, there is a concern that the problem of deteriorating the calenderability.

In the present invention, the lubricant added to the polyester composition containing the composite UV stabilizer for molding the polyester base sheet 10 is to improve processability, for example, montan wax, montan ester wax Lubricating agents, such as esterified montan wax, an olefin type, and an amide type wax, can be used, and the composition ratio is preferably 0.1 to 1.5 parts by weight based on 100 parts by weight of polyester. If it is less than the above range, roll adhesion may occur during calendering, and if it exceeds the above range, there may be a problem that the printability is lowered during product use.

Flame retardant added to the polyester composition containing a composite UV stabilizer for molding the polyester base sheet 10 in the present invention blocks the ignition by volatile organic compounds (VOC) generated during image printing In order to add, for example, any one selected from the group consisting of antimony oxide (Sb ₂ O ₃ ), aluminum hydroxide (Al (OH) ₃ ) and magnesium hydroxide (Mg (OH) ₂ ) can be used, It is preferable to use the composition ratio 10-40 weight part with respect to 100 weight part of polyester. If it is less than the above range, flame retardancy falls, and if it exceeds the above range, there may be a problem in processing that a resin melt viscosity decreases.

Pigment may be added to the polyester composition containing a composite UV stabilizer for molding the polyester base sheet 10 in the present invention in order to improve coloring power and impart hiding power, such as titanium oxide and The same inorganic pigment can be used, and the composition ratio is preferably 0.1 to 20 parts by weight based on 100 parts by weight of polyester. If it is less than the said range, hiding power will fall, and when it exceeds the said range, there exists a possibility that the processing problem which resin melt viscosity falls may arise.

The acrylic resin coating layer, which is the surface layer 20 of the polyester sheet having excellent light resistance according to the present invention, may be formed by coating or transferring an acrylic copolymer composition.

The surface layer 20 according to the present invention has excellent weather resistance and scratch resistance as a thickness in the range of 10 micrometers (µm) to 20 micrometers (µm).

It can be achieved by forming the surface layer 20 with the acrylic copolymer composition containing the excellent weather resistance and scratch resistance composite ultraviolet (UV) stabilizer as described above.

The acrylic copolymer composition may be appropriately used in a composition containing 0.3 to 3 parts by weight of a composite UV stabilizer and 0.1 to 10 parts by weight of a flame retardant based on 100 parts by weight of the acrylic copolymer.

The composite ultraviolet (UV) stabilizer constituting the acrylic copolymer composition may be used in the same composition (composition component and composition ratio) as the composite ultraviolet (UV) stabilizer constituting the polyester composition for molding the base sheet 10, The flame retardant may be a flame retardant of the same kind as the flame retardant added to the polyester composition.

Referring to Figure 2, Figure 2 is another embodiment (second embodiment) of the polyester-based sheet excellent in light resistance according to the present invention, the polyester-based base sheet 10 and the printing layer 30 on the base sheet Is formed and the acrylic resin coating layer, which is the surface layer 20, is formed on the printed layer 30 in order.

The print layer 30 may give a surface pattern effect by forming a print layer by a printing method such as gravure printing, if necessary.

Referring to FIG. 3, FIG. 3 is another embodiment (third embodiment) of a polyester sheet having excellent light resistance according to the present invention, and an adhesive layer 40 and a surface layer (on the polyester substrate sheet 10). 20) shows a structure in which an acrylic resin coating layer is formed in sequence.

The adhesive layer 40 is formed to have a thickness of 1 micron (μm) to 3 microns (μm) as a configuration that helps to form a surface of the acrylic resin coating layer 20 is firmly.

Referring to FIG. 4, FIG. 4 is another embodiment (fourth embodiment) of a polyester sheet having excellent light resistance according to the present invention. The surface layer 20 is formed on one surface of the polyester substrate sheet 10. ) Is a acrylic resin coating layer is formed and the other side shows a structure in which a primer layer (50) is formed.

The primer layer 50 is a primer layer formed on a general decor sheet and is formed to have a thickness in the range of 1 micrometer (µm) to 3 micrometers (µm) as a component for improving adhesion when used as a surface finishing sheet.

The base sheet of the polyester-based sheet for surface finishing according to the present invention can be produced by the conventional sheet forming method such as calendar processing of the polyester composition as described above.

The polyester-based sheet (FIG. 1) manufacturing method of the excellent light resistance of the present invention comprises the steps of preparing a polyester composition containing a composite UV stabilizer and an acrylic resin composition containing a composite UV stabilizer, respectively; Molding a polyester sheet as a base sheet using the polyester composition; Forming a surface layer of the acrylic resin composition on one side (upper surface) of the base sheet.

The polyester sheet, which is the base sheet, may be formed by a calender, casting, or extrusion method. Mixing of the composition suitable for calender processing is preferably a gelling method using a bandari, FCM, PWE, Buss-Kneader, and in the case of a gelling method using an extruder, it is preferable to use a compound or masterbatch in which the composition is mixed. desirable.

The surface layer polyacryl coating layer is formed by coating a thickness of 10 microns (μm) to 20 microns (μm) on the upper surface of the base layer by transfer, spray or roll coating.

The polyester sheet of the present invention preferably has a thickness in the range of 100 microns (μm) to 700 microns (μm) for use as a surface finish material.

Hereinafter, a polyester sheet and a method of manufacturing the same according to the present invention will be described in more detail.

Example 1

First, 15 g (g) of Tinuvin P, a hydroxyphenylbenzotriazole, and Cyasorb UV-531, a hydroxybenzophenone, were used as a composite UV stabilizer to form a polyester base sheet. 30 grams (g) of combined UV stabilizer was mixed with 1 kilogram (kg) of PET-G, followed by 5 grams (g) of phosphite-based antioxidant (trade name, Irganox B-561, Ciba, Switzerland) As the antimony oxide 100g (g) was added to obtain a PET-G composition.

The composition was sufficiently gelled in FCM, and then put in a calender roll to prepare a PET-G base sheet having a thickness of 0.5 mm.

Next, 15 grams of Tinuvin P, a hydroxyphenylbenzotriazole, and Cyasorb UV-531, a hydroxybenzophenone, were 15 grams, respectively, as a complex UV stabilizer to form a surface layer on the PET-G base sheet. 30 grams (g) of mixed UV stabilizer was mixed with 1 kilogram (kg) of acrylic copolymer (resin) to obtain an acrylic copolymer composition, which was then 15 micrometer (µm) on the PET-G base sheet. Coating to a thickness, a surface layer was formed to prepare a polyester-based sheet (Fig. 1) excellent in light resistance according to the present invention.

And the damage resistance and light resistance of the polyester sheet produced by the present Example was measured and the results are shown in the following [Table 1].

Example 2

24 grams of Tinuvin P (2-hydroxyphenylbenzotriazole), Cyasorb UV-531 (2-hydroxybenzophenone) and Tinuvin120 (benzoate), 8 grams (g) The same procedure as in Example 1 was conducted except that a gram (g) composite UV stabilizer was used.

And the damage resistance and light resistance of the polyester sheet produced by the present Example was measured and the results are shown in the following [Table 1].

Example 3

3 grams (g) of Tinuvin P (2-hydroxyphenylbenzotriazoles) and Cyasorb UV-531 (2-hydroxybenzophenones), 1.5 grams each, were mixed and mixed as UV stabilizers. Except for using a complex UV stabilizer, and carried out in the same manner as in Example 1, the damage resistance and light resistance measurement results are shown in Table 1 below.

Example 4

6 grams of Tinuvin P (2-hydroxyphenylbenzotriazole), Cyasorb UV-531 (2-hydroxybenzophenone), and 2 grams (g) of benzoate-based Tinuvin as mixed UV stabilizers Except for using the gram (g) composite UV stabilizer was carried out in the same manner as in Example 1, and the damage resistance and light resistance measurement results are shown in Table 1 below.

Example 5

4 grams (g) of Tinuvin P, 2-hydroxyphenylbenzotriazole, Cyasorb UV-531, 2-hydroxybenzophenone, and Tinuvin120, a benzoate, were mixed and mixed. Except for using the gram (g) composite UV stabilizer was carried out in the same manner as in Example 1, and the damage resistance and light resistance measurement results are shown in Table 1 below.

Comparative Example 1

First, in order to form a polyester base sheet, 1 kg (kg) of PET-G and 5 g (g) of a phosphite-based antioxidant (trade name, Irganox B-561 from Ciba, Switzerland), 100 g (g) of antimony oxide as a flame retardant Was added to obtain a PET-G composition.

The composition was sufficiently gelled in FCM, and then put in a calender roll to prepare a PET-G base sheet having a thickness of [0.5 mm].

And the damage resistance and light resistance of the polyester sheet produced by the present Example was measured and the results are shown in the following [Table 1].

Comparative Example 2

PET-G as in Comparative Example 1, except that 30 grams (g) of Tinuvin P, a hydroxyphenylbenzotriazole, was added to the PET-G composition for forming the base sheet as a UV stabilizer. A base sheet was produced.

Next, 30 grams (g) of Tinuvin P, a hydroxyphenylbenzotriazole, as a UV stabilizer was mixed with 1 kilogram (kg) of acrylic copolymer (resin) to form a surface layer on the PET-G base sheet. After obtaining the acrylic copolymer resin composition, it was coated on the PET-G base sheet with a thickness of 15 micron (μm), to form a surface layer, to prepare a polyester sheet.

The damage resistance and light resistance measurement results are shown in Table 1 below.

Comparative Example 3

Comparative Example except that 30 g (g) of Cyasorb UV-531, a hydroxybenzophenone, was added to the PET-G composition for forming the base sheet and the acrylic copolymer resin for forming the surface layer as a UV stabilizer. It carried out similarly to 2, and shows the damage resistance and the light resistance measurement result in Table 1 below.

Comparative Example 4

Except that 30 g (g) of benzoate-based Tinuvin120 was added as a UV stabilizer to the PET-G composition for forming the base sheet and the acrylic copolymer for forming the surface layer, the same procedure as in Comparative Example 2 was performed. The results of the measurement and the light resistance are shown in Table 1 below.

TABLE 1

 Classification Light Resistance Scratch Resistance

Example 1 0.3 2H

2 0.4 2H

3 2.3 2H

4 1.8 2H

5 0.7 2H

  Comparative Example 1 3.5 B or less

2 3.2 2H

3 2.8 2H

4 2.9 2H

Note 1). The light resistance was measured by QUV B313 nm irradiation for 400 hours, followed by a change in color, that is, a difference in color change.

As shown in Table 1, the polyester-based sheet according to the embodiment of the present invention is used in a polyester-based sheet (comparative example) using a single UV stabilizer by using two or more composite UV stabilizers in the base sheet and the surface layer. It can be seen that there is an excellent effect of significantly improving the light resistance, and by forming the surface layer with the acrylic copolymer resin composition, it can be confirmed that there is a damage resistance (scratch resistance) effect, polyester molded into the composition according to the present invention The system sheet also showed excellent flame retardancy.

As described above, the polyester sheet according to the present invention has a much better light resistance than the polyester sheet (comparative example) using a single UV stabilizer by using a composite UV stabilizer, and damage resistance (scratch resistance It is also suitable for the use of surface finishing sheet for long-term use after construction because of its excellent effect. In addition, the polyester-based sheet according to the present invention is excellent in flame retardancy, so there is a safe effect on fire after construction.

Claims (17)

In the polyester sheet for surface finishing, A polyester base sheet formed of a polyester composition containing a composite UV stabilizer and a composite UV stabilizer on an upper surface of the base sheet It consists of the surface layer formed from the acrylic resin composition containing, The polyester-type sheet excellent in light resistance. According to claim 1, wherein the complex UV stabilizer is a benzotriazole UV (UV) stabilizer, benzophenone UV (UV) stabilizer, benzoate UV (UV) stabilizer or cyanoacrylate type It is a composite ultraviolet (UV) stabilizer which consists of 2 or more types selected from an ultraviolet (UV) stabilizer, The polyester-type sheet excellent in light resistance characterized by the above-mentioned. The benzotriazole UV stabilizer comprises hydroxyphenylbenzotriazole, and the benzophenone UV stabilizer is hydroxybenzoate. Polyester-based sheet having excellent light resistance, comprising phenone (2-hydroxybenzophenone). The polyester sheet having excellent light resistance according to claim 1, wherein a printing layer is further formed between the polyester base sheet and the surface layer. The polyester sheet having excellent light resistance according to claim 1, wherein an adhesive layer is further formed between the polyester base sheet and the surface layer. The polyester sheet having excellent light resistance according to claim 1, wherein a primer layer is further formed on the lower rear surface of the polyester base sheet.   The polyester sheet having excellent light resistance according to claim 4, wherein an adhesive layer is further formed between the print layer and the surface layer. 8. The polyester-based sheet having excellent light resistance according to claim 7, wherein a primer layer is further formed on the lower rear surface of the polyester-based base sheet. The polyester-based sheet having excellent light resistance according to claim 5, wherein a primer layer is further formed on a lower rear surface of the polyester-based base sheet. 10. The method according to any one of claims 1 to 9, wherein the polyester composition containing the composite UV stabilizer is added to 100 parts by weight of the glycol modified polyethylene terephthalate (PET-G). UV) A polyester sheet having excellent light resistance, comprising 0.3 to 3 parts by weight of stabilizer, 0.1 to 1.5 parts by weight of antioxidant, 0.1 to 1.5 parts by weight of lubricant, and 10 to 40 parts by weight of flame retardant. The composite resin stabilizer according to any one of claims 1 to 9, wherein the acrylic resin composition containing the composite ultraviolet stabilizer is 0.3 to 3 parts by weight of the composite ultraviolet (UV) stabilizer and 0.1 to 10 parts by weight of the flame retardant based on 100 parts by weight of the acrylic copolymer. A polyester sheet excellent in light resistance, characterized by containing a weight part. In the manufacturing method of the polyester sheet for surface finishing, Respectively preparing a polyester composition containing a composite UV stabilizer for molding a polyester base sheet and an acrylic resin composition containing a composite UV stabilizer for forming a surface layer; Molding a base sheet using the polyester composition; A method for producing a polyester-based sheet having excellent light resistance according to any one of claims 1 to 9, comprising the step of forming a surface layer of the acrylic resin composition on the upper surface of the base sheet and a drying step. . The method of claim 12, wherein before or after the step of forming a surface layer of the acrylic resin composition on the upper surface of the base sheet Forming a printing layer on the polyester base sheet; Forming an adhesive layer between the polyester base sheet and the surface layer; Forming a primer layer on a lower rear surface of the polyester base sheet; Method for producing a polyester sheet excellent in light resistance, characterized in that it comprises one or more steps selected from the group consisting of forming an adhesive layer between the print layer and the surface layer. In the manufacturing method of the polyester sheet for surface finishing, Respectively preparing a polyester composition containing a composite UV stabilizer for molding a polyester base sheet and an acrylic resin composition containing a composite UV stabilizer for forming a surface layer; Molding a base sheet using the polyester composition; A method for producing a polyester-based sheet having excellent light resistance according to claim 10, comprising the step of forming a surface layer of the acrylic resin composition on the upper surface of the base sheet and a drying step. In the manufacturing method of the polyester sheet for surface finishing, Respectively preparing a polyester composition containing a composite UV stabilizer for molding a polyester base sheet and an acrylic resin composition containing a composite UV stabilizer for forming a surface layer; Molding a base sheet using the polyester composition; A method for producing a polyester sheet having excellent light resistance according to claim 11, comprising the step of forming a surface layer of the acrylic resin composition on the upper surface of the base sheet and a drying step. 15. The method of claim 14, before or after the step of forming a surface layer of the acrylic resin composition on the upper surface of the base sheet Forming a printing layer on the polyester base sheet; Forming an adhesive layer between the polyester base sheet and the surface layer; Forming a primer layer on a lower rear surface of the polyester base sheet; Method for producing a polyester sheet excellent in light resistance, characterized in that it comprises one or more steps selected from the group consisting of forming an adhesive layer between the print layer and the surface layer. The method of claim 15, wherein before or after the step of forming a surface layer of the acrylic resin composition on the upper surface of the base sheet Forming a printing layer on the polyester base sheet; Forming an adhesive layer between the polyester base sheet and the surface layer; Forming a primer layer on a lower rear surface of the polyester base sheet; Method for producing a polyester sheet excellent in light resistance, characterized in that it comprises one or more steps selected from the group consisting of forming an adhesive layer between the print layer and the surface layer.

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