Household facing environment-friendly GAG sheet and manufacturing method thereof

Abstract

The invention particularly relates to a household facing environment-friendly GAG sheet and a manufacturing method thereof. The household facing environment-friendly GAG sheet comprises an upper PETG layer, an APET layer and a lower PETG layer, wherein the weight ratio of the upper PETG layer to the APET layer to the lower PETG layer is (10-16): (68-80): (10-16); the PETG composite material is prepared from the following raw materials in parts by weight: 80 to 90 parts of PETG resin, 12 to 18 parts of polyglycolic acid, 2 to 4 parts of toughening agent, 4 to 7 parts of nano zinc oxide, 3 to 6 parts of 3-(2, 3-epoxypropoxy) propyltrimethoxysilane, 3 to 6 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 0.5 to 2.5 parts of antioxidant, 1 to 3 parts of slipping agent and 2 to 5 parts of color master batch. The household facing environment-friendly GAG sheet has excellent mechanical properties, wear resistance and cold and heat cycle resistance, and is beneficial to improving the decoration and durability of household articles.

Description

Technical Field

[0001] The invention relates to the technical field of GAG materials, and in particular to an environmentally friendly GAG sheet material for home furnishing and a manufacturing method thereof. Background Art

[0002] With the development of society and the improvement of people's living standards, people's requirements for home environment are getting higher and higher. At present, in order to improve the durability, aesthetics and cleanability of household items such as cabinets, wardrobes, bathroom cabinets, wooden doors, etc., decorative films are often added to the surfaces of objects such as walls. Therefore, the performance of decorative films has an important impact on the durability and convenience of household items.

[0003] APET is non-crystallized polyethylene terephthalate, an important packaging and decorative material with the advantages of high light transmittance, good gas barrier, chemical corrosion resistance, environmental protection and non-toxicity. It has a wide range of uses, but due to its poor water resistance, especially under high temperature and high humidity conditions, it is easy to cause the material to become brittle and reduce impact resistance, resulting in material cracking and other problems. Its printing performance is worse than PETG, requiring corona treatment or special inks with high costs. PETG is polyethylene terephthalate-1,4-cyclohexane dimethanol, a transparent, non-crystalline copolyester. PETG sheet has good toughness and impact strength, and has a wide processing range, but it is expensive. GAG sheet is a three-layer composite produced by co-extrusion of the middle layer APET and the upper and lower layers of PETG raw materials in a suitable proportion. As a new type of plastic new material sheet, GAG sheet effectively combines the advantages of PETG material and PETG, has good transparency, processing performance and thermoforming, and has the advantages of environmental protection, excellent food hygiene, good toughness, etc. It can play a good protective role on the surface of objects and is widely used in the packaging of food, medicine, hardware, electrical appliances and handicrafts, building materials and furniture industries. However, although the existing GAG sheet has many advantages, it still has shortcomings in mechanical properties, wear resistance and resistance to cold and heat cycles. Therefore, it is of great significance to develop environmentally friendly GAG materials with excellent mechanical properties, wear resistance and resistance to cold and heat cycles, and further enhance its application range and performance of home furnishing decoration to meet market demand and improve product quality. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide an environmentally friendly GAG sheet for home furnishing, which has excellent mechanical properties, wear resistance and resistance to cold and hot cycles, and helps to improve the decorativeness and durability of household items.

[0005] Another object of the present invention is to provide a method for manufacturing environmentally friendly GAG sheets for home furnishings, which has convenient operation and control, high production efficiency, low production cost, and is conducive to industrial production.

[0006] The objective of the present invention is achieved by the following technical scheme: an environmentally friendly GAG sheet for home furnishing, comprising an upper PETG layer, an APET layer and a lower PETG layer arranged from top to bottom, wherein the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 10-16:68-80:10-16; the upper PETG layer and the lower PETG layer are both made of a PETG composite material, and the PETG composite material comprises the following raw materials in parts by weight: 80-90 parts of PETG resin, 12-18 parts of polyglycolic acid, 2-4 parts of a toughening agent, 4-7 parts of nano zinc oxide, 3-6 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-6 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 0.5-2.5 parts of an antioxidant, 1-3 parts of a lubricant and 2-5 parts of a masterbatch.

[0007] The present invention produces the environmentally friendly GAG home furnishing sheet by co-extruding an upper PETG layer, an APET layer and a lower PETG layer together, so that the prepared environmentally friendly GAG home furnishing sheet has excellent mechanical properties, wear resistance and resistance to cold and heat cycles, and has lower production cost than PETG sheets of the same specifications; and compared with APET sheets of the same specifications, the material cost is not much increased compared with APET, and has excellent comprehensive performance.

[0008] The invention combines PGA, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, styrene-acrylonitrile-glycidyl methacrylate copolymer with other raw materials, adds them into a PETG composite material system, and controls the addition ratio of each raw material, so that the PETG layer has good mechanical properties and cold and hot cycle resistance.

[0009] Furthermore, the toughening agent is at least one of ethylene-methyl acrylate copolymer and styrene-ethylene-butylene-styrene block copolymer.

[0010] Furthermore, the antioxidant is at least one of a hindered phenol antioxidant or a phosphite antioxidant.

[0011] Furthermore, the antioxidant is at least one of tetrakis[β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate] pentaerythritol, β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate octadecyl alcohol, tris(2.4-di-tert-butylphenyl) phosphite and bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite.

[0012] Furthermore, the lubricant in the PETG composite material is at least one of a silicone lubricant, an erucamide lubricant and an oleamide lubricant.

[0013] Furthermore, the APET layer comprises the following raw materials in parts by weight: 80-90 parts of APET resin, 10-15 parts of vinylidene fluoride-hexafluoropropylene copolymer, 3-6 parts of maleic anhydride grafted polypropylene, 2-5 parts of vinyl tri(β-methoxyethoxy) silane, 1-3 parts of lubricant, and 2-5 parts of masterbatch.

[0014] The APET layer of the present invention is helpful to improve the mechanical properties and resistance to cold and heat cycles of the APET layer by combining vinylidene fluoride-hexafluoropropylene copolymer, maleic anhydride grafted polypropylene, and vinyl tri(β-methoxyethoxy) silane with APET resin, thereby improving the tensile properties of the GAG ​​sheet, making it have good decorative properties, and achieving good protection for furniture and supplies.

[0015] Furthermore, the preparation method of the APET resin includes the following steps: taking terephthalic acid and ethylene glycol in a molar ratio of 1:1.1-1.25 and mixing them evenly to obtain a mixture A; adding 200-350 ppm of dioctyltin distearate to the mixture A, and then performing a first esterification reaction in a first esterification kettle, and then performing a second esterification reaction in a second esterification kettle; then performing a pre-polycondensation reaction in a first polycondensation reactor, and then performing a polycondensation reaction in a second pre-polycondensation reactor to obtain the APET resin.

[0016] Furthermore, the temperature of the first esterification reaction is 250-255°C, the pressure is 0.20-0.25MPa, and the reaction time is 45-75min; the temperature of the second esterification reaction is 260-265°C, the pressure is 0.25-0.30Mpa, and the reaction time is 25-35min.

[0017] Furthermore, the temperature of the pre-polycondensation reaction is 265-270°C, the pressure is 20-30 kPa, and the reaction time is 25-35 min; the temperature of the polycondensation reaction is 270-275°C, the pressure is 3-4 kPa, and the reaction time is 25-35 min.

[0018] Furthermore, the lubricant in the APET layer is at least one of a silicone lubricant, an erucamide lubricant and an oleamide lubricant.

[0019] The purpose of the present invention is achieved through the following technical solution: A method for manufacturing the above-mentioned environmentally friendly GAG sheet for home furnishings, comprising the following steps: (1) Material preparation After the raw materials of the PETG composite material for preparing the upper PETG layer are uniformly mixed in proportion, the mixture is dried to obtain the upper PETG layer mixture for standby use; After mixing the raw materials constituting the APET layer in proportion, drying is performed to control the moisture content to be less than 0.005% to obtain an APET mixed material for standby use; After each raw material of the PETG composite material for preparing the lower PETG layer is uniformly mixed in proportion, it is dried to obtain a lower PETG layer mixture for standby use; (2) Three-layer co-extrusion The dried upper PETG layer mixture, the APET mixture and the lower PETG layer mixture are co-extruded according to a weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same; (3) Three-roll calendering A three-roll calender is used to cool and shape the three-layer co-extruded sheet; (4) Post-processing The sheet material after three-roll calendering is pulled, trimmed and curled to obtain the environmentally friendly GAG sheet material product for home furnishing.

[0020] Furthermore, in step (1), the drying temperature of the upper PETG layer mixture and the lower PETG layer mixture is 65-72° C., the drying time is 4-6 hours, and the moisture content is controlled to be less than 0.005%.

[0021] Furthermore, in step (1), the drying temperature of the APET mixture is 145-155°C, the drying time is 4-6 hours, and the moisture content is controlled to be less than 0.005%. By adopting the above process, the APET mixture is fully discharged to prevent the water generated during the melt extrusion process from causing the APET molecules to hydrolyze, thereby affecting the mechanical properties and product quality of the APET.

[0022] Furthermore, in step (2), a three-layer co-extruder is used for three-layer co-extrusion, the APET layer mixture is extruded by a twin-screw extruder or a single-screw extruder, and the extrusion temperature is 255-270°C; the upper PETG layer and the lower PETG layer mixture are extruded by a single-screw extruder, and the extrusion temperature is 220-240°C; the die temperature is 230-240°C.

[0023] Furthermore, in step (3), the cooling temperature of the three-roll calender is 20-40°C.

[0024] The GAG ​​sheet co-extrusion composite process of the present invention supplies different molten material flows through three extruders respectively, uses a BAB type distributor, merges the mixed materials of each layer through a certain flow channel in a composite head, and performs co-extrusion composite to obtain a GAG sheet composite sheet, which helps to overcome the large problem of the difference in physical properties between PETG and APET resins, enables the PETG layer and the APET layer to be well combined, and can prevent the material from yellowing, thereby obtaining an environmentally friendly GAG sheet for home furnishing with excellent comprehensive performance.

[0025] The beneficial effects of the present invention are as follows: the present invention produces environmentally friendly GAG sheets for home furnishing by co-extruding an upper PETG layer, an APET layer and a lower PETG layer together, and the prepared environmentally friendly GAG sheets for home furnishing have excellent mechanical properties, wear resistance and resistance to cold and heat cycles, and have a long service life, and relative to PETG sheets of the same specification, the production cost is lower and the product is environmentally friendly. The upper PETG layer and the lower PETG are added to the PETG composite material system by matching PGA, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, styrene-acrylonitrile-methacrylate glycidyl ester copolymer and other raw materials, and the addition ratio of each raw material is controlled, so that the PETG layer has good mechanical properties, wear resistance and resistance to cold and heat cycles, which helps to improve the decorativeness and durability of the environmentally friendly GAG sheets for home furnishing, and is suitable for home furnishing fields such as cabinets, wardrobes, bathroom cabinets, wooden doors, ceilings, floors, etc.

[0026] The manufacturing method of the environmentally friendly GAG sheet for home furnishing of the present invention is convenient to operate and control, has high production efficiency, low production cost, and is conducive to industrial production. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0028] In some embodiments of the present invention, an environmentally friendly GAG sheet for home furnishing comprises an upper PETG layer, an APET layer and a lower PETG layer arranged from top to bottom, wherein the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 10-16:68-80:10-16; the upper PETG layer and the lower PETG layer are both made of a PETG composite material, and the PETG composite material comprises the following raw materials in parts by weight: 80-90 parts of PETG resin, 12-18 parts of polyglycolic acid, 2-4 parts of a toughening agent, 4-7 parts of nano zinc oxide, 3-6 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-6 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 0.5-2.5 parts of an antioxidant, 1-3 parts of a lubricant, and 2-5 parts of a masterbatch.

[0029] In some embodiments of the present invention, the toughening agent is at least one of ethylene-methyl acrylate copolymer and styrene-ethylene-butylene-styrene block copolymer. The ethylene-methyl acrylate copolymer is DuPont Elvaloy AC1125 ethylene methyl acrylate copolymer. The styrene-ethylene-butylene-styrene block copolymer is American Kraton SEBS KRATON FG1901.

[0030] In some embodiments of the present invention, the toughening agent is composed of ethylene-methyl acrylate copolymer and styrene-ethylene-butylene-styrene block copolymer in a weight ratio of 1:1-2.5.

[0031] In some embodiments of the present invention, the antioxidant is at least one of a hindered phenol antioxidant or a phosphite antioxidant.

[0032] In some embodiments of the present invention, the antioxidant is at least one of tetrakis[β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate] pentaerythritol, β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate, tris(2.4-di-tert-butylphenyl) phosphite and bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite.

[0033] In some embodiments of the present invention, the antioxidant is composed of pentaerythritol tetrakis[β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate] and tris(2.4-di-tert-butylphenyl) phosphite in a weight ratio of 1-2:1:2.

[0034] In some embodiments of the present invention, the lubricant of the PETG composite material is recorded as lubricant A, and the lubricant A is at least one of a silicone lubricant, an erucamide lubricant and an oleamide lubricant.

[0035] In some embodiments of the present invention, the lubricant A is at least one of oleamide and erucamide.

[0036] In some embodiments of the present invention, the APET layer comprises the following raw materials in parts by weight: 80-90 parts of APET resin, 10-15 parts of vinylidene fluoride-hexafluoropropylene copolymer, 3-6 parts of maleic anhydride grafted polypropylene, 2-5 parts of vinyl tri(β-methoxyethoxy) silane, 1-3 parts of lubricant, and 2-5 parts of masterbatch. The masterbatch is TPE masterbatch In some embodiments of the present invention, the preparation method of the APET resin comprises the following steps: taking terephthalic acid and ethylene glycol and mixing them evenly in a molar ratio of 1:1.1-1.25 to obtain a mixture A; adding 200-350 ppm of dioctyltin distearate to the mixture A, and then performing a first esterification reaction in a first esterification kettle, and then performing a second esterification reaction in a second esterification kettle; then performing a pre-polycondensation reaction in a first polycondensation reactor, and then performing a polycondensation reaction in a second pre-polycondensation reactor to obtain the APET resin.

[0037] Furthermore, the temperature of the first esterification reaction is 250-255°C, the pressure is 0.20-0.25MPa, and the reaction time is 45-75min; the temperature of the second esterification reaction is 260-265°C, the pressure is 0.25-0.30Mpa, and the reaction time is 25-35min.

[0038] Furthermore, the temperature of the pre-polycondensation reaction is 265-270°C, the pressure is 20-30 kPa, and the reaction time is 25-35 min; the temperature of the polycondensation reaction is 270-275°C, the pressure is 3-4 kPa, and the reaction time is 25-35 min.

[0039] In some embodiments of the present invention, the lubricant of the APET layer is recorded as lubricant B, and the lubricant B is at least one of a silicone lubricant, an erucamide lubricant and an oleamide lubricant.

[0040] In some embodiments of the present invention, the lubricant B is at least one of oleamide and erucamide.

[0041] In some embodiments of the present invention, a method for manufacturing the above-mentioned environmentally friendly GAG sheet for home furnishings comprises the following steps: (1) Material preparation After the raw materials of the PETG composite material for preparing the upper PETG layer are uniformly mixed in proportion, the mixture is dried to obtain the upper PETG layer mixture for standby use; The raw materials constituting the APET layer are mixed in proportion and dried to obtain an APET mixed material for later use; After each raw material of the PETG composite material for preparing the lower PETG layer is mixed uniformly in proportion, it is dried to obtain the lower PETG layer mixed material for standby use; (2) Three-layer co-extrusion The dried upper PETG layer mixture, the APET mixture and the lower PETG layer mixture are co-extruded according to a weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same; (3) Three-roll calendering A three-roll calender is used to cool and shape the three-layer co-extruded sheet; (4) Post-processing The sheet material after three-roll calendering is pulled, trimmed and curled to obtain the environmentally friendly GAG sheet material product for home furnishing.

[0042] In some embodiments of the present invention, in step (1), the drying temperature of the upper PETG layer mixture and the lower PETG layer mixture is 65-72° C., the drying time is 4-6 hours, and the moisture content is controlled to be less than 0.005%.

[0043] In some embodiments of the present invention, in step (1), the drying temperature of the APET mixture is 145-155° C., the drying time is 4-6 hours, and the moisture content is controlled to be less than 0.005%.

[0044] In some embodiments of the present invention, in step (2), a three-layer co-extruder is used for three-layer co-extrusion, the APET layer mixture is extruded by a twin-screw extruder or a single-screw extruder, and the extrusion temperature is 255-270°C; the upper PETG layer and the lower PETG layer mixture are extruded by a single-screw extruder, and the extrusion temperature is 220-240°C; the die temperature is 230-240°C.

[0045] In some embodiments of the present invention, in step (3), the cooling temperature of the three-roll calender is 20-40°C. Example 1

[0046] The present embodiment provides an environmentally friendly GAG sheet for home furnishing, comprising an upper PETG layer, an APET layer and a lower PETG layer arranged from top to bottom, wherein the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 15:70:15; the upper PETG layer and the lower PETG layer are both made of a PETG composite material, and the PETG composite material comprises the following raw materials in parts by weight: 85 parts of PETG resin, 15 parts of polyglycolic acid, 3 parts of a toughening agent, 5 parts of nano zinc oxide, 5 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 4 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 1.5 parts of an antioxidant, 2 parts of a lubricant, and 4 parts of a masterbatch.

[0047] In this embodiment, the PETG resin is PETG CR-5083 from China Resources. The polyglycolic acid is polyglycolic acid from Speedool, with a CAS number of 26124-68-5. The styrene-acrylonitrile-glycidyl methacrylate copolymer is SAG-008 styrene-acrylonitrile-glycidyl methacrylate copolymer from Jiayirong. The masterbatch is Dynaflex G2712-1000-02 TPE masterbatch.

[0048] Furthermore, the toughening agent is composed of ethylene-methyl acrylate copolymer and styrene-ethylene-butylene-styrene block copolymer in a weight ratio of 1:2. The ethylene-methyl acrylate copolymer is DuPont Elvaloy AC1125 ethylene-methyl acrylate copolymer. The styrene-ethylene-butylene-styrene block copolymer is Kraton SEBS KRATONFG1901.

[0049] Further, the antioxidant is composed of pentaerythritol tetrakis[β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate] and tris(2.4-di-tert-butylphenyl) phosphite in a weight ratio of 1:1. The lubricant in the PETG composite material is erucamide.

[0050] Furthermore, the APET layer comprises the following raw materials in parts by weight: 85 parts of APET resin, 12 parts of vinylidene fluoride-hexafluoropropylene copolymer, 4 parts of maleic anhydride grafted polypropylene, 3 parts of vinyl tri(β-methoxyethoxy) silane, 2 parts of lubricant, and 3 parts of masterbatch. The vinylidene fluoride-hexafluoropropylene copolymer adopts polyvinylidene fluoride-hexafluoropropylene copolymer Solef 21216. The maleic anhydride grafted polypropylene adopts maleic anhydride grafted polypropylene Arkema CA100N. The APET layer can add the same masterbatch as the PETG composite material.

[0051] In some embodiments of the present invention, the preparation method of the APET resin comprises the following steps: taking terephthalic acid and ethylene glycol and mixing them evenly in a molar ratio of 1:1.15 to obtain a mixture A; adding 250 ppm of dioctyltin distearate to the mixture A, and then performing a first esterification reaction in a first esterification kettle, and then performing a second esterification reaction in a second esterification kettle; then performing a pre-polycondensation reaction in a first polycondensation reactor, and then performing a polycondensation reaction in a second pre-polycondensation reactor to obtain the APET resin.

[0052] Furthermore, the temperature of the first esterification reaction is 252° C., the pressure is 0.22 MPa, and the reaction time is 60 min; the temperature of the second esterification reaction is 262° C., the pressure is 0.28 MPa, and the reaction time is 30 min.

[0053] Furthermore, the temperature of the pre-polycondensation reaction is 268° C., the pressure is 25 kPa, and the reaction time is 30 min; the temperature of the polycondensation reaction is 272° C., the pressure is 3.5 kPa, and the reaction time is 30 min.

[0054] Furthermore, the lubricant in the APET layer is erucamide.

[0055] This embodiment also provides a method for manufacturing the environmentally friendly GAG sheet for home furnishing, comprising the following steps: Material preparation After the raw materials of the PETG composite material for preparing the upper PETG layer are uniformly mixed in proportion, the mixture is dried to obtain the upper PETG layer mixture for standby use; The raw materials constituting the APET layer are mixed in proportion and dried to obtain an APET mixed material for later use; After each raw material of the PETG composite material for preparing the lower PETG layer is uniformly mixed in proportion, it is dried to obtain a lower PETG layer mixture for standby use; (2) Three-layer co-extrusion The dried upper PETG layer mixture, the APET mixture and the lower PETG layer mixture are co-extruded according to a weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same; (3) Three-roll calendering A three-roll calender is used to cool and shape the three-layer co-extruded sheet; (4) Post-processing The sheet material after three-roll calendering is pulled, trimmed and curled to obtain the environmentally friendly GAG sheet material product for home furnishing.

[0056] Furthermore, in step (1), the drying temperature of the upper PETG layer mixture and the lower PETG layer mixture is 68° C., the drying time is 5 h, and the moisture content is controlled to be less than 0.005%.

[0057] Furthermore, in step (1), the drying temperature of the APET mixture is 150° C., the drying time is 5 h, and the moisture content is controlled to be less than 0.005%.

[0058] Furthermore, in step (2), a three-layer co-extruder is used for three-layer co-extrusion, the APET layer mixture is extruded by a twin-screw extruder at an extrusion temperature of 265°C; the upper PETG layer and the lower PETG layer mixture are extruded by a single-screw extruder at an extrusion temperature of 230°C; and the die head temperature is 235°C.

[0059] Furthermore, the cooling temperature of the three-roll calender is 30°C. Example 2

[0060] The present embodiment provides an environmentally friendly GAG sheet for home furnishing, comprising an upper PETG layer, an APET layer and a lower PETG layer arranged from top to bottom, wherein the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 15:70:15; the upper PETG layer and the lower PETG layer are both made of a PETG composite material, and the PETG composite material comprises the following raw materials in parts by weight: 80 parts of PETG resin, 12 parts of polyglycolic acid, 2 parts of a toughening agent, 4 parts of nano zinc oxide, 3 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 1 part of an antioxidant, 1.5 parts of a lubricant, and 3 parts of a masterbatch.

[0061] Furthermore, the toughening agent is composed of ethylene-methyl acrylate copolymer and styrene-ethylene-butylene-styrene block copolymer in a weight ratio of 1:2.

[0062] Further, the antioxidant is composed of pentaerythritol tetrakis[β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionate] and tris(2.4-di-tert-butylphenyl) phosphite in a weight ratio of 1: 1. The lubricant in the PETG composite material is oleic acid amide.

[0063] Furthermore, the APET layer comprises the following raw materials in parts by weight: 80 parts of APET resin, 10 parts of vinylidene fluoride-hexafluoropropylene copolymer, 4 parts of maleic anhydride grafted polypropylene, 3 parts of vinyl tri(β-methoxyethoxy)silane, 1.5 parts of lubricant, and 2 parts of masterbatch. The lubricant in the APET layer is oleic acid amide.

[0064] This embodiment also provides a method for manufacturing the environmentally friendly GAG sheet for home furnishing, comprising the following steps: (1) Material preparation After the raw materials of the PETG composite material for preparing the upper PETG layer are uniformly mixed in proportion, the mixture is dried to obtain the upper PETG layer mixture for standby use; The raw materials constituting the APET layer are mixed in proportion and dried to obtain an APET mixed material for later use; After each raw material of the PETG composite material for preparing the lower PETG layer is mixed uniformly in proportion, it is dried to obtain the lower PETG layer mixed material for standby use; (2) Three-layer co-extrusion The dried upper PETG layer mixture, the APET mixture and the lower PETG layer mixture are co-extruded according to a weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same; (3) Three-roll calendering A three-roll calender is used to cool and shape the three-layer co-extruded sheet; (4) Post-processing The sheet material after three-roll calendering is pulled, trimmed and curled to obtain the environmentally friendly GAG sheet material product for home furnishing.

[0065] Furthermore, in step (1), the drying temperature of the upper PETG layer mixture and the lower PETG layer mixture is 65° C., the drying time is 6 h, and the moisture content is controlled to be less than 0.005%.

[0066] Furthermore, in step (1), the drying temperature of the APET mixture is 145° C., the drying time is 6 h, and the moisture content is controlled to be less than 0.005%.

[0067] Furthermore, in step (2), a three-layer co-extruder is used for three-layer co-extrusion, the APET layer mixture is extruded by a twin-screw extruder at an extrusion temperature of 260°C; the upper PETG layer and the lower PETG layer mixture are extruded by a single-screw extruder at an extrusion temperature of 225°C; and the die head temperature is 235°C.

[0068] Furthermore, in step (3), the cooling temperature of the three-roll calender is 30°C.

[0069] The rest of the content of this embodiment is the same as that of Embodiment 1 and will not be repeated here. Example 3

[0070] This embodiment provides an environmentally friendly GAG sheet for home decoration, comprising an upper PETG layer, an APET layer and a lower PETG layer arranged from top to bottom, wherein the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 15:70:15; the upper PETG layer and the lower PETG layer are both made of a PETG composite material, and the PETG composite material comprises the following raw materials in parts by weight: 90 parts of PETG resin, 18 parts of polyglycolic acid, 3 parts of a toughening agent, 6 parts of nano zinc oxide, 5 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 4 parts of styrene-acrylonitrile-methacrylate glycidyl ester copolymer, 2 parts of an antioxidant, 2.5 parts of a lubricant, and 4 parts of a masterbatch. The lubricant in the PETG composite material is erucamide.

[0071] Furthermore, the APET layer comprises the following raw materials in parts by weight: 90 parts of APET resin, 15 parts of vinylidene fluoride-hexafluoropropylene copolymer, 5 parts of maleic anhydride grafted polypropylene, 4 parts of vinyl tri(β-methoxyethoxy)silane, 2 parts of lubricant, and 3.5 parts of masterbatch. The lubricant in the APET layer is erucamide.

[0072] This embodiment also provides a method for manufacturing the environmentally friendly GAG sheet for home furnishing, comprising the following steps: (1) Material preparation After the raw materials of the PETG composite material for preparing the upper PETG layer are uniformly mixed in proportion, the mixture is dried to obtain the upper PETG layer mixture for standby use; The raw materials constituting the APET layer are mixed in proportion and dried to obtain an APET mixed material for later use; After each raw material of the PETG composite material for preparing the lower PETG layer is mixed uniformly in proportion, it is dried to obtain the lower PETG layer mixed material for standby use; (2) Three-layer co-extrusion The dried upper PETG layer mixture, the APET mixture and the lower PETG layer mixture are co-extruded according to a weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same; (3) Three-roll calendering A three-roll calender is used to cool and shape the three-layer co-extruded sheet; (4) Post-processing The sheet material after three-roll calendering is pulled, trimmed and curled to obtain the environmentally friendly GAG sheet material product for home furnishing.

[0073] Furthermore, in step (2), a three-layer co-extruder is used for three-layer co-extrusion, the APET layer mixture is extruded by a twin-screw extruder at an extrusion temperature of 265°C; the upper PETG layer and the lower PETG layer mixture are extruded by a single-screw extruder at an extrusion temperature of 235°C; and the die head temperature is 240°C.

[0074] Furthermore, in step (3), the cooling temperature of the three-roll calender is 32°C.

[0075] The rest of the content of this embodiment is the same as that of Embodiment 1 and will not be repeated here.

[0076] Comparative Example 1 The difference between this comparative example and the above-mentioned Example 1 is that polyglycolic acid is not added to the PETG composite material of this comparative example, and an equal amount of PETG is used instead. The rest of the contents of this comparative example are the same as those of Example 1, and will not be repeated here.

[0077] Comparative Example 2 The difference between this comparative example and the above-mentioned Example 1 is that: 3-(2,3-epoxypropoxy)propyltrimethoxysilane is not added to the PETG composite material of this comparative example, and an equal amount of PETG is used instead. The rest of the contents of this comparative example are the same as those of Example 1, and will not be repeated here.

[0078] Comparative Example 3 The difference between this comparative example and the above-mentioned Example 1 is that: styrene-acrylonitrile-glycidyl methacrylate copolymer is not added to the PETG composite material of this comparative example, and an equal amount of PETG is used instead. The rest of the contents of this comparative example are the same as those of Example 1, and will not be repeated here.

[0079] Comparative Example 4 The difference between this comparative example and the above-mentioned Example 1 is that: the APET layer of this comparative example includes the following parts by weight of raw materials without adding vinylidene fluoride-hexafluoropropylene copolymer, and an equal amount of APET is used instead. The rest of the contents of this comparative example are the same as those of Example 1, and will not be repeated here.

[0080] The performance test was conducted on the environmentally friendly GAG sheet samples for home decoration prepared in Examples 1-3 and Comparative Examples 1-4. The thickness of the GAG ​​sheet was 0.35 mm. The results are shown in Table 1 below: project Tensile strengthMpa Elongation at break % <![CDATA[Wear resistance (volume loss Fv) mm 3 > Scratch resistance Resistance to hot and cold cycles Example 1 62.8 66.7 1.5 No continuous scratches greater than 90% No wrinkles, no bubbles, no cracks, no obvious discoloration or loss of gloss Example 2 63.4 65.2 1.7 No continuous scratches greater than 90% No wrinkles, no bubbles, no cracks, no obvious discoloration or loss of gloss Example 3 61.1 64.1 1.6 No continuous scratches greater than 90% No wrinkles, no bubbles, no cracks, no obvious discoloration or loss of gloss Comparative Example 1 58.6 62.6 1.7 No continuous scratches greater than 90% Slight wrinkling and bubbling, no cracking, no obvious discoloration or loss of gloss Comparative Example 2 55.4 60.6 2.0 No continuous scratches greater than 90% Slight wrinkling and bubbling, no cracking, no obvious discoloration or loss of gloss Comparative Example 3 57.7 64.9 1.8 No continuous scratches greater than 90% Slight wrinkling and bubbling, no cracking, no obvious discoloration or loss of gloss Comparative Example 4 54.9 58.3 1.5 No continuous scratches greater than 90% Slight wrinkling and bubbling, no cracking, no obvious discoloration or loss of gloss Among them, the tensile strength and elongation at break tests refer to GB / T1040.3-2006. The wear resistance test refers to GB / T11982.1-2015.6.7, and the volume loss Fv is calculated. The scratch resistance test method is as follows: Use a multifunctional scratch resistance tester to test the sample for scratch resistance. The weight model is the national standard 1.0N, and the judgment standard is that there are no continuous scratches in 90% of cases after one rotation. The cold and hot cycle resistance test method is as follows: Put the sample into the cold and hot cycle tester, set the tester temperature to two temperature points of -30°C and 65°C, keep each temperature point for 1 hour, and cycle 550 times under the condition of 80%RH humidity, and observe whether there are wrinkles, bubbling, cracking, obvious discoloration and loss of gloss. The hardness test method is as follows: Use an electric pencil hardness tester to test the pencil hardness of the sample. The pencil is a Japanese Mitsubishi 1887 hardness pencil, and a 750g weight. The levels of Examples 1-3 are all 1H.

[0081] From the above content, it can be seen that the present invention produces the environmentally friendly GAG sheet for home furnishing by co-extruding the upper PETG layer, the APET layer and the lower PETG layer together, so that the prepared environmentally friendly GAG sheet for home furnishing has excellent wear resistance, scratch resistance, resistance to cold and hot cycles and mechanical properties, good tensile properties, and thus has excellent decorativeness and durability.

[0082] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. An environmentally friendly GAG sheet for home furnishing, characterized by: The invention comprises an upper PETG layer, an APET layer and a lower PETG layer which are arranged from top to bottom, wherein the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 10-16:68-80:10-16; the upper PETG layer and the lower PETG layer are both made of a PETG composite material, and the PETG composite material comprises the following raw materials in parts by weight: 80-90 parts of PETG resin, 12-18 parts of polyglycolic acid, 2-4 parts of a toughening agent, 4-7 parts of nano zinc oxide, 3-6 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-6 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 0.5-2.5 parts of an antioxidant, 1-3 parts of a lubricant and 2-5 parts of a masterbatch.

2. The environmentally friendly GAG sheet for home furnishing according to claim 1, characterized in that: The toughening agent is at least one of ethylene-methyl acrylate copolymer and styrene-ethylene-butylene-styrene block copolymer.

3. The environmentally friendly GAG sheet for home furnishing according to claim 1, characterized in that: The antioxidant is at least one of a hindered phenol antioxidant and a phosphite antioxidant.

4. The environmentally friendly GAG sheet for home furnishing according to claim 1, characterized in that: The lubricant is at least one of an erucamide lubricant, an oleamide lubricant and a silicone lubricant.

5. The environmentally friendly GAG sheet for home furnishing according to claim 1, characterized in that: The APET layer comprises the following raw materials in parts by weight: 80-90 parts of APET resin, 10-15 parts of vinylidene fluoride-hexafluoropropylene copolymer, 3-6 parts of maleic anhydride grafted polypropylene, 2-5 parts of vinyl tri(β-methoxyethoxy) silane, 1-3 parts of lubricant, and 2-5 parts of masterbatch.

6. A method for manufacturing an environmentally friendly GAG sheet for home furnishings according to any one of claims 1 to 5, characterized in that: The steps include: (1) Material preparation After the raw materials for preparing the PETG composite material of the upper PETG layer are mixed uniformly in proportion, the mixture is dried to obtain the upper PETG layer mixture for standby use; after the raw materials for constituting the APET layer are mixed uniformly in proportion, the mixture is dried to obtain the APET mixture for standby use; after the raw materials for preparing the PETG composite material of the lower PETG layer are mixed uniformly in proportion, the mixture is dried to obtain the lower PETG layer mixture for standby use; (2) Three-layer co-extrusion The dried upper PETG layer mixture, the APET mixture and the lower PETG layer mixture are respectively subjected to three-layer co-extrusion according to a weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same; (3) Three-roll calendering A three-roll calender is used to cool and shape the three-layer co-extruded sheet; (4) Post-processing The sheet material after three-roll calendering is pulled, trimmed and curled to obtain the environmentally friendly GAG sheet material product for home furnishing.

7. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 6, characterized in that: In step (1), the drying temperature of the upper PETG layer mixture and the lower PETG layer mixture is 65-72° C., the drying time is 4-6 hours, and the moisture content is controlled to be less than 0.005%.

8. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 6, characterized in that: In step (1), the drying temperature of the APET mixture is 145-155°C, the drying time is 4-6 hours, and the moisture content is controlled to be less than 0.005%.

9. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 6, characterized in that: In step (2), a three-layer co-extruder is used for three-layer co-extrusion. The APET layer mixture is extruded by a twin-screw extruder or a single-screw extruder at an extrusion temperature of 255-270°C. The upper PETG layer and the lower PETG layer mixture are extruded by a single-screw extruder at an extrusion temperature of 220-240°C. The die head temperature is 230-240°C.

10. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 6, characterized in that: In step (3), the cooling temperature of the three-roll calender is 20-40°C.