An environmentally friendly GAG sheet for home decoration and its manufacturing method

Abstract

The present invention specifically relates to an environmentally friendly GAG sheet for home decoration and a manufacturing method thereof. The environmentally friendly GAG sheet for home decoration comprises an upper PETG layer, an APET layer and a lower PETG layer, and the weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 10-16:68-80:10-16; 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 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 antioxidant, 1-3 parts of slip agent, and 2-5 parts of masterbatch. The environmentally friendly GAG sheet for home decoration has excellent mechanical properties, wear resistance and resistance to thermal cycling, which helps to improve the decoration and durability of household items.

Description

Technical Field

[0001] The present invention relates to the technical field of GAG materials, and particularly relates to an environmentally friendly GAG sheet for home decoration 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 the home environment are getting higher and higher. At present, in order to improve the durability, aesthetics, and easy cleaning of home furnishings such as cabinets, wardrobes, bathroom cabinets, and wooden doors, decorative films are often added to the surfaces of objects such as walls. Therefore, the performance of the decorative film has an important impact on aspects such as the durability and usability of home furnishings.

[0003] APET is amorphous polyethylene terephthalate glycol ester, which is an important packaging and decorative material. It has advantages such as high light transmittance, good gas barrier property, chemical corrosion resistance, environmental protection and non-toxicity, and is widely used. However, 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 the impact resistance to decrease, resulting in problems such as material cracking. Moreover, its printing performance is worse than that of PETG, and it requires corona treatment or special inks with high costs. PETG is polyethylene terephthalate-1,4-cyclohexanedimethanol ester, which is a transparent, amorphous copolyester. PETG sheets have good toughness and impact strength, and have a wide processing range, but are expensive. GAG sheets are three-layer composites produced by co-extruding a middle layer of APET and upper and lower layers of PETG raw materials in a suitable proportion. As a new type of plastic new material sheet, GAG sheets effectively combine the advantages of PETG materials and PETG, have good transparency, processing performance, and thermoformability, and have advantages such as environmental protection, excellent food hygiene, and good toughness, and can play a good protective role on the surface of objects, and are widely used in fields such as the packaging of food, medicine, hardware, electrical appliances, and handicrafts, building materials, and furniture industries. However, although the existing GAG sheets have many advantages, there are still deficiencies in their mechanical properties, wear resistance, and resistance to thermal cycling. Therefore, it is of great significance to develop an environmentally friendly GAG material with excellent mechanical properties, wear resistance, and resistance to thermal cycling, and further improve its application range and usability in home decoration to meet market demands and improve product quality. Summary of the Invention

[0004] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the present invention is to provide an environmentally friendly GAG sheet for home decoration, and the GAG sheet has excellent mechanical properties, wear resistance, and resistance to thermal cycling, which helps to improve the decoration and durability of home furnishings.

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

[0006] The object of the present invention is achieved by the following technical solutions: An environmentally friendly GAG sheet for home decoration, including an upper PETG layer, an APET layer, and a lower PETG layer arranged from top to bottom, and the weight ratio of the upper PETG layer, the APET layer, and the lower PETG layer is 10-16:68-80:10-16; both the upper PETG layer and the lower PETG layer are made of a PETG composite material, and the PETG composite material includes the following raw materials in parts by weight: 80-90 parts of PETG resin, 12-18 parts of polyglycolic acid, 2-4 parts of 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 antioxidant, 1-3 parts of slip agent, 2-5 parts of masterbatch.

[0007] The present invention co-extrudes the upper PETG layer, the APET layer, and the lower PETG layer together to produce an environmentally friendly GAG sheet for home decoration, so that the obtained environmentally friendly GAG sheet for home decoration has excellent mechanical properties, wear resistance, and resistance to thermal cycling, and has a lower production cost compared with PETG sheets of the same specification; and compared with APET sheets of the same specification, the material cost is not much higher than that of APET, and it has excellent comprehensive properties.

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

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

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

[0011] Further, the antioxidant is at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl,4-hydroxyphenyl)propionate], octadecyl 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.

[0012] Further, the slip agent in the PETG composite material is at least one of silicone-based slip agents, erucamide-based slip agents, and oleamide-based slip agents.

[0013] Further, the APET layer comprises raw materials in the following 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 vinyltris(β-methoxyethoxy)silane, 1-3 parts of slip agent, and 2-5 parts of masterbatch.

[0014] By combining vinylidene fluoride-hexafluoropropylene copolymer, maleic anhydride grafted polypropylene, and vinyltris(β-methoxyethoxy)silane with APET resin in the APET layer of the present invention, it helps to improve the mechanical properties and heat and cold cycle resistance of the APET layer, thereby enhancing the tensile properties of the GAG sheet, endowing it with good decorative properties, and achieving good protection for furniture products.

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

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

[0017] Further, 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] Further, the slip agent in the APET layer is at least one of silicone-based slip agents, erucamide-based slip agents, and oleamide-based slip agents.

[0019] The object of the present invention is achieved by the following technical solutions: a manufacturing method of the above-mentioned environmentally friendly GAG sheet for home decoration, comprising the following steps:

[0020] (1) Preparation of materials

[0021] After mixing the raw materials for preparing the PETG composite material of the upper PETG layer evenly according to the proportion, dry them to obtain the upper PETG layer mixture for standby;

[0022] After mixing the raw materials for forming the APET layer according to the proportion, dry them to control the moisture content below 0.005%, and obtain the APET mixture for standby;

[0023] After mixing the raw materials for preparing the PETG composite material of the lower PETG layer evenly according to the proportion, dry them to obtain the lower PETG layer mixture for standby;

[0024] (2) Three-layer coextrusion

[0025] Coextrude the dried upper PETG layer mixture, APET mixture and lower PETG layer mixture according to the weight ratio. The weight ratios of the upper PETG layer mixture and the lower PETG layer mixture are the same;

[0026] (3) Three-roll calendering

[0027] Use a three-roll calender to cool and shape the sheet after three-layer coextrusion;

[0028] (4) Post-treatment

[0029] Traction, trimming and coiling of the sheet after three-roll calendering are carried out to obtain the environmentally friendly GAG sheet product for home decoration.

[0030] 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 h, and the moisture content is controlled below 0.005%.

[0031] Furthermore, in step (1), the drying temperature of the APET mixture is 145 - 155 °C, the drying time is 4 - 6 h, and the moisture content is controlled below 0.005%. By adopting the above process, the APET mixture is fully discharged, preventing the moisture generated during the melting extrusion process from promoting the hydrolysis of APET molecules, thereby affecting the mechanical properties and product quality of APET.

[0032] Furthermore, in step (2), a three-layer coextrusion machine is used for three-layer coextrusion. The extrusion of the APET layer mixture is carried out by a twin-screw extruder or a single-screw extruder, and the extrusion temperature is 255 - 270 °C; the extrusion of the upper PETG layer and the lower PETG layer mixtures is carried out by a single-screw extruder, and the extrusion temperature is 220 - 240 °C; the die head temperature is 230 - 240 °C.

[0033] Furthermore, in step (3), the cooling temperature of the three-roll calender is 20 - 40 °C.

[0034] The co-extrusion compounding process of the GAG sheet of the present invention supplies different molten material flows through three extruders respectively. By using a BAB-type distributor, the mixed materials of each layer are converged in the compounding head through a certain flow channel for co-extrusion compounding to obtain a GAG sheet composite sheet, which helps to overcome the relatively large difference in physical properties between PETG and APET resins, enables good bonding between the PETG layer and the APET layer, and can prevent the material from turning yellow, thereby obtaining an environmentally friendly GAG sheet for home decoration with excellent comprehensive performance.

[0035] The beneficial effects of the present invention are as follows: The present invention co-extrudes the upper PETG layer, the APET layer and the lower PETG layer together to produce an environmentally friendly GAG sheet for home decoration. The obtained environmentally friendly GAG sheet for home decoration has excellent mechanical properties, wear resistance and resistance to thermal cycling, a long service life, and lower production costs compared to PETG sheets of the same specifications, and is environmentally friendly. The upper PETG layer and the lower PETG layer are prepared by combining PGA, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, styrene-acrylonitrile-glycidyl methacrylate copolymer with other raw materials, adding them to the PETG composite material system, and controlling the addition ratios of the raw materials, so that the PETG layer has good mechanical properties, wear resistance and resistance to thermal cycling, which helps to improve the decorative and durable properties of the environmentally friendly GAG sheet for home decoration and is suitable for home fields such as cabinets, wardrobes, bathroom cabinets, wooden doors, suspended ceilings, and floors.

[0036] The manufacturing method of the environmentally friendly GAG sheet for home decoration of the present invention is convenient to operate and control, has high production efficiency, low production cost, and is conducive to industrial production. Specific Embodiments

[0037] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with embodiments. The content mentioned in the embodiments does not limit the present invention.

[0038] In some embodiments of the present invention, an environmentally friendly GAG sheet for home decoration includes an upper PETG layer, an APET layer and a lower PETG layer arranged from top to bottom. The weight ratio of the upper PETG layer, the APET layer and the lower PETG layer is 10-16:68-80:10-16; both the upper PETG layer and the lower PETG layer are made of a PETG composite material, and the PETG composite material includes the following raw materials in parts by weight: 80-90 parts of PETG resin, 12-18 parts of polyglycolic acid, 2-4 parts of 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 antioxidant, 1-3 parts of slip agent, and 2-5 parts of masterbatch.

[0039] In some embodiments of the present invention, the toughening agent is at least one of ethylene-methyl acrylate copolymer and styrene-ethylene-butene-styrene block copolymer. The ethylene-methyl acrylate copolymer uses DuPont Elvaloy AC1125 ethylene-methyl acrylate copolymer. The styrene-ethylene-butene-styrene block copolymer uses Kraton SEBS FG1901 from Kraton Polymers USA, LLC.

[0040] In some embodiments of the present invention, the toughening agent is composed of ethylene-methyl acrylate copolymer and styrene-ethylene-butene-styrene block copolymer in a weight ratio of 1:1 - 2.5.

[0041] In some embodiments of the present invention, the antioxidant is at least one of hindered phenol antioxidants or phosphite antioxidants.

[0042] In some embodiments of the present invention, the antioxidant is at least one of pentaerythritol tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl 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.

[0043] In some embodiments of the present invention, the antioxidant is composed of pentaerythritol tetra[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.

[0044] In some embodiments of the present invention, the slip agent of the PETG composite material is denoted as slip agent A, and the slip agent A is at least one of silicone-based slip agents, erucamide-based slip agents, and oleamide-based slip agents.

[0045] In some embodiments of the present invention, the slip agent A is at least one of oleamide and erucamide.

[0046] 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 vinyltri(β-methoxyethoxy)silane, 1 - 3 parts of slip agent, and 2 - 5 parts of masterbatch. The masterbatch uses TPE masterbatch

[0047] In some embodiments of the present invention, the preparation method of the APET resin comprises the following steps: Mix terephthalic acid and ethylene glycol evenly according to a molar ratio of 1:1.1 - 1.25 to obtain mixture A; add 200 - 350 ppm of dioctyltin distearate to mixture A, then carry out the first esterification reaction in the first esterification kettle and the second esterification reaction in the second esterification kettle; then carry out the pre-polycondensation reaction in the first polycondensation reaction kettle and the polycondensation reaction in the second pre-polycondensation reaction kettle to obtain the APET resin.

[0048] Further, the temperature of the first esterification reaction is 250 - 255 °C, the pressure is 0.20 - 0.25 MPa, and the reaction time is 45 - 75 min; the temperature of the second esterification reaction is 260 - 265 °C, the pressure is 0.25 - 0.30 Mpa, and the reaction time is 25 - 35 min.

[0049] Further, 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.

[0050] In some embodiments of the present invention, the slip agent of the APET layer is denoted as slip agent B, and the slip agent B is at least one of silicone-based slip agents, erucamide-based slip agents, and oleamide-based slip agents.

[0051] In some embodiments of the present invention, the slip agent B is at least one of oleamide and erucamide.

[0052] In some embodiments of the present invention, a manufacturing method of the above-mentioned environmentally friendly GAG sheet for home decoration comprises the following steps:

[0053] (1) Preparation of materials

[0054] Mix the raw materials for preparing the PETG composite material of the upper PETG layer evenly according to the proportion, and then dry to obtain the upper PETG layer mixture for standby;

[0055] Mix the raw materials for forming the APET layer according to the proportion, and then dry to obtain the APET mixture for standby;

[0056] Mix the raw materials for preparing the PETG composite material of the lower PETG layer evenly according to the proportion, and then dry to obtain the lower PETG layer mixture for standby;

[0057] (2) Three-layer co-extrusion

[0058] The dried upper PETG layer mixture, APET mixture, and lower PETG layer mixture are co-extruded according to a weight ratio, and the weight ratios of the upper PETG layer mixture and the lower PETG layer mixture are the same;

[0059] (3)Three-roll calendering

[0060] A three-roll calender is used to cool and shape the sheet after three-layer co-extrusion;

[0061] (4)Post-treatment

[0062] The sheet after three-roll calendering is drawn, trimmed, and coiled to obtain an environmentally friendly GAG sheet product for home decoration.

[0063] 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 h, and the moisture content is controlled to be less than 0.005%.

[0064] 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 h, and the moisture content is controlled to be less than 0.005%.

[0065] In some embodiments of the present invention, in step (2), a three-layer co-extruder is used for three-layer co-extrusion. The extrusion of the APET layer mixture is carried out by a twin-screw extruder or a single-screw extruder, and the extrusion temperature is 255-270 °C; the extrusion of the upper PETG layer and the lower PETG layer mixtures is carried out by a single-screw extruder, and the extrusion temperature is 220-240 °C; the die head temperature is 230-240 °C.

[0066] In some embodiments of the present invention, in step (3), the cooling temperature of the three-roll calender is 20-40 °C. Example 1

[0067] This example provides an environmentally friendly GAG sheet for home decoration, including an upper PETG layer, an APET layer, and a lower PETG layer arranged from top to bottom. The weight ratio of the upper PETG layer, the APET layer, and the lower PETG layer is 15:70:15; both the upper PETG layer and the lower PETG layer are made of a PETG composite material, and the PETG composite material includes the following raw materials in parts by weight: 85 parts of PETG resin, 15 parts of polyglycolic acid, 3 parts of 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 antioxidant, 2 parts of slip agent, and 4 parts of color masterbatch.

[0068] In this embodiment, the PETG resin used is CR-5083 PETG from China Resources. The polyglycolic acid used is polyglycolic acid from Supuer Company, with the CAS number 26124-68-5. The styrene-acrylonitrile-glycidyl methacrylate copolymer used is SAG-008 styrene-acrylonitrile-glycidyl methacrylate copolymer from Jia Yirong. The masterbatch used is Dynaflex G2712-1000-02 TPE masterbatch.

[0069] 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 used is Elvaloy AC1125 ethylene-methyl acrylate copolymer from DuPont. The styrene-ethylene-butylene-styrene block copolymer used is Kraton SEBS KRATON FG1901 from Kraton.

[0070] Furthermore, the antioxidant is composed of pentaerythritol tetra[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 slip agent in the PETG composite material is erucamide.

[0071] 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 vinyltri(β-methoxyethoxy)silane, 2 parts of slip agent, and 3 parts of masterbatch. The vinylidene fluoride-hexafluoropropylene copolymer used is Solef 21216 polyvinylidene fluoride-hexafluoropropylene copolymer. The maleic anhydride grafted polypropylene used is Arkema CA100N maleic anhydride grafted polypropylene. The same masterbatch as that in the PETG composite material can be added to the APET layer.

[0072] 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 according to a molar ratio of 1:1.15 to obtain mixture A; adding 250 ppm of dioctyltin distearate to mixture A, then carrying out the first esterification reaction in the first esterification kettle and the second esterification reaction in the second esterification kettle; then carrying out the pre-polycondensation reaction in the first polycondensation reaction kettle and the polycondensation reaction in the second pre-polycondensation reaction kettle to obtain the APET resin.

[0073] 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.

[0074] Further, 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.

[0075] Further, the slip agent in the APET layer is erucamide.

[0076] This embodiment also provides a manufacturing method of the above-mentioned environmentally friendly GAG sheet for home decoration, including the following steps:

[0077] Preparation of materials

[0078] After mixing the raw materials for preparing the PETG composite material of the upper PETG layer in proportion and uniformly, drying is carried out to obtain the upper PETG layer mixture for standby;

[0079] After mixing the raw materials constituting the APET layer in proportion, drying is carried out to obtain the APET mixture for standby;

[0080] After mixing the raw materials for preparing the PETG composite material of the lower PETG layer in proportion and uniformly, drying is carried out to obtain the lower PETG layer mixture for standby;

[0081] (2) Three-layer co-extrusion

[0082] The dried upper PETG layer mixture, APET mixture and lower PETG layer mixture are co-extruded according to the weight ratio, and the weight ratios of the upper PETG layer mixture and the lower PETG layer mixture are the same;

[0083] (3) Three-roll calendering

[0084] Using a three-roll calender, the sheet after three-layer co-extrusion is cooled and shaped;

[0085] (4) Post-treatment

[0086] The sheet after three-roll calendering is drawn, trimmed and coiled to obtain the environmentally friendly GAG sheet product for home decoration.

[0087] Further, 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 water content is controlled to be less than 0.005%.

[0088] Further, in step (1), the drying temperature of the APET mixture is 150 °C, the drying time is 5 h, and the water content is controlled to be less than 0.005%.

[0089] Further, in step (2), three-layer co-extrusion is carried out using a three-layer co-extrusion machine. The extrusion of the APET layer mixture is carried out using a twin-screw extruder with an extrusion temperature of 265°C; the extrusion of the upper PETG layer and the lower PETG layer mixtures is carried out using a single-screw extruder with an extrusion temperature of 230°C; the die head temperature is 235°C.

[0090] Further, the cooling temperature of the three-roll calender is 30°C. Example 2

[0091] This example provides an environmentally friendly GAG sheet for home decoration, including an upper PETG layer, an APET layer, and a lower PETG layer arranged from top to bottom. The weight ratio of the upper PETG layer, the APET layer, and the lower PETG layer is 15:70:15; both the upper PETG layer and the lower PETG layer are made of a PETG composite material, and the PETG composite material includes the following raw materials in parts by weight: 80 parts of PETG resin, 12 parts of polyglycolic acid, 2 parts of 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 antioxidant, 1.5 parts of slip agent, and 3 parts of color masterbatch.

[0092] Further, the toughening agent is composed of ethylene-methyl acrylate copolymer and styrene-ethylene-butene-styrene block copolymer in a weight ratio of 1:2.

[0093] Further, the antioxidant is composed of pentaerythritol tetra[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 slip agent in the PETG composite material is oleic acid amide.

[0094] Further, the APET layer includes 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 vinyltri(β-methoxyethoxy)silane, 1.5 parts of slip agent, and 2 parts of color masterbatch. The slip agent in the APET layer is oleic acid amide.

[0095] This example also provides a manufacturing method for the above-mentioned environmentally friendly GAG sheet for home decoration, including the following steps:

[0096] (1) Preparation of materials

[0097] After mixing the raw materials of the PETG composite material for preparing the upper PETG layer evenly in proportion, drying is carried out to obtain the upper PETG layer mixture for standby;

[0098] After mixing the raw materials constituting the APET layer in proportion, drying is carried out to obtain the APET mixture for standby;

[0099] After mixing the raw materials for preparing the PETG composite material for the lower PETG layer evenly in proportion, dry them to obtain the mixed material for the lower PETG layer for standby;

[0100] (2)Three-layer coextrusion

[0101] Coextrude the dried mixed material for the upper PETG layer, the APET mixed material and the mixed material for the lower PETG layer according to the weight ratio, and the weight ratio of the mixed material for the upper PETG layer and the mixed material for the lower PETG layer is the same;

[0102] (3)Three-roll calendering

[0103] Use a three-roll calender to cool and shape the sheet after three-layer coextrusion;

[0104] (4)Post-treatment

[0105] Traction, trimming and coiling of the sheet after three-roll calendering are carried out to obtain the environmentally friendly GAG sheet product for home decoration.

[0106] Further, in step (1), the drying temperature of the mixed material for the upper PETG layer and the mixed material for the lower PETG layer is 65 °C, the drying time is 6 h, and the moisture content is controlled to be less than 0.005%.

[0107] Further, in step (1), the drying temperature of the APET mixed material is 145 °C, the drying time is 6 h, and the moisture content is controlled to be less than 0.005%.

[0108] Further, in step (2), a three-layer coextrusion machine is used for three-layer coextrusion. The extrusion of the APET layer mixed material uses a twin-screw extruder, and the extrusion temperature is 260 °C; the extrusion of the upper PETG layer and the lower PETG layer mixed materials uses a single-screw extruder, and the extrusion temperature is 225 °C; the die head temperature is 235 °C.

[0109] Further, in step (3), the cooling temperature of the three-roll calender is 30 °C.

[0110] The remaining content of this embodiment is the same as that of Embodiment 1 and will not be elaborated here. Example 3

[0111] This embodiment provides an environmentally friendly GAG sheet for home decoration, which includes an upper PETG layer, an APET layer, and a lower PETG layer arranged from top to bottom. The weight ratio of the upper PETG layer, the APET layer, and the lower PETG layer is 15:70:15. Both the upper PETG layer and the lower PETG layer are made of a PETG composite material, and the PETG composite material includes the following raw materials in parts by weight: 90 parts of PETG resin, 18 parts of polyglycolic acid, 3 parts of toughening agent, 6 parts of nano-zinc oxide, 5 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 4 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 2 parts of antioxidant, 2.5 parts of slip agent, and 4 parts of masterbatch. The slip agent in the PETG composite material is erucamide.

[0112] Further, the APET layer includes 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 vinyltri(β-methoxyethoxy)silane, 2 parts of slip agent, and 3.5 parts of masterbatch. The slip agent in the APET layer is erucamide.

[0113] This embodiment also provides a manufacturing method of the above-mentioned environmentally friendly GAG sheet for home decoration, which includes the following steps:

[0114] (1) Preparation of materials

[0115] After mixing the raw materials of the PETG composite material for preparing the upper PETG layer evenly according to the proportion, drying is carried out to obtain the upper PETG layer mixture for standby;

[0116] After mixing the raw materials constituting the APET layer according to the proportion, drying is carried out to obtain the APET mixture for standby;

[0117] After mixing the raw materials of the PETG composite material for preparing the lower PETG layer evenly according to the proportion, drying is carried out to obtain the lower PETG layer mixture for standby;

[0118] (2) Three-layer coextrusion

[0119] The dried upper PETG layer mixture, APET mixture, and lower PETG layer mixture are coextruded according to the weight ratio, and the weight ratio of the upper PETG layer mixture and the lower PETG layer mixture is the same;

[0120] (3) Three-roll calendering

[0121] A three-roll calender is used to cool and shape the sheet after three-layer coextrusion;

[0122] (4) Post-treatment

[0123] The sheet after three-roll calendering is drawn, trimmed, and coiled to obtain an environmentally friendly GAG sheet product for home decoration.

[0124] Further, in step (2), a three-layer co-extrusion machine is used for three-layer co-extrusion. The extrusion of the APET layer mixture is carried out by a twin-screw extruder with an extrusion temperature of 265 °C; the extrusion of the upper and lower PETG layer mixtures is carried out by a single-screw extruder with an extrusion temperature of 235 °C; the die head temperature is 240 °C.

[0125] Further, in step (3), the cooling temperature of the three-roll calender is 32 °C.

[0126] The remaining content of this embodiment is the same as that of Embodiment 1 and will not be elaborated here.

[0127] Comparative Example 1

[0128] The difference between this comparative example and the above Embodiment 1 is that: polyglycolic acid is not added to the PETG composite material in this comparative example and is replaced with an equal amount of PETG. The remaining content of this comparative example is the same as that of Embodiment 1 and will not be elaborated here.

[0129] Comparative Example 2

[0130] The difference between this comparative example and the above Embodiment 1 is that: 3-(2,3-epoxypropoxy)propyltrimethoxysilane is not added to the PETG composite material in this comparative example and is replaced with an equal amount of PETG. The remaining content of this comparative example is the same as that of Embodiment 1 and will not be elaborated here.

[0131] Comparative Example 3

[0132] The difference between this comparative example and the above Embodiment 1 is that: styrene-acrylonitrile-glycidyl methacrylate copolymer is not added to the PETG composite material in this comparative example and is replaced with an equal amount of PETG. The remaining content of this comparative example is the same as that of Embodiment 1 and will not be elaborated here.

[0133] Comparative Example 4

[0134] The difference between this comparative example and the above Embodiment 1 is that: vinylidene fluoride-hexafluoropropylene copolymer is not added to the raw materials of the APET layer in this comparative example and is replaced with an equal amount of APET. The remaining content of this comparative example is the same as that of Embodiment 1 and will not be elaborated here.

[0135] Performance tests are carried out on the environmentally friendly GAG sheet samples prepared in Embodiments 1-3 and Comparative Examples 1-4. The thickness of the GAG sheet is 0.35 mm, and the results are shown in Table 1 below:

[0136] Project Tensile strength Mpa Elongation at break % <![CDATA[Wear resistance (volume loss Fv) mm 3 > Scratch resistance Thermal cycling resistance Example 1 62.8 66.7 1.5 No continuous scratches greater than 90% No wrinkling, bubbling, cracking, obvious discoloration or loss of gloss Example 2 63.4 65.2 1.7 No continuous scratches greater than 90% No wrinkling, bubbling, cracking, obvious discoloration or loss of gloss Example 3 61.1 64.1 1.6 No continuous scratches greater than 90% No wrinkling, bubbling, cracking, 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

[0137] Among them, the tensile strength and elongation at break tests were carried out with reference to GB / T 1040.3-2006. The abrasion resistance test was carried out with reference to GB / T 11982.1-2015.6.7, and the volume loss Fv was calculated. The scratch resistance test method is as follows: Use a multi-functional scratch resistance testing machine to conduct scratch resistance tests on the samples. The weight model is the national standard 1.0N, and the judgment standard is that there are no continuous scratches in 90% after one rotation. The test method for heat and cold cycle resistance is as follows: Put the samples into a heat and cold cycle tester, set the tester temperature at 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 phenomena such as wrinkling, bubbling, cracking, obvious color change and loss of gloss. The hardness test method is as follows: Use an electric pencil hardness tester to conduct pencil hardness tests on the samples. The pencils used are Mitsubishi 1887 hardness pencils from Japan, with a 750g weight. The grades of Examples 1-3 were all measured as 1H.

[0138] As can be seen from the above content, in the present invention, the upper PETG layer, the APET layer and the lower PETG layer are co-extruded together to produce the environmentally friendly GAG sheet for home decoration, so that the obtained environmentally friendly GAG sheet for home decoration has excellent abrasion resistance, scratch resistance, heat and cold cycle resistance and mechanical properties, and good tensile properties, thus having excellent decoration and durability.

[0139] The above embodiments are the preferred implementation solutions of the present invention. In addition, the present invention can 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 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; 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.

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. A method for manufacturing an environmentally friendly GAG sheet for home furnishings according to any one of claims 1 to 4, 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.

6. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 5, 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%.

7. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 5, 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%.

8. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 5, 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.

9. The method for manufacturing the environmentally friendly GAG sheet for home furnishing according to claim 5, characterized in that: In step (3), the cooling temperature of the three-roll calender is 20-40°C.