PETG environment-friendly floor and preparation method thereof

Abstract

According to the PETG environment-friendly floor, the traditional PVC material is replaced with polyethylene terephthalate-1, 4-cyclohexanedimethanol, potential risks to human health and the environment are reduced, through the design of a multi-layer structure, the abrasion resistance, the decoration performance and the structural stability of the floor can be enhanced, and the service life of the floor is prolonged. The invention also provides a preparation method of the PETG environment-friendly floor. Through cooperation of the high-speed stirrer and the low-speed stirrer, preliminary mixing and plasticizing of raw materials are promoted, meanwhile, the raw materials are prevented from being over-plasticized, uniform mixing of the raw materials is ensured, the roller press is adopted, the wear-resistant layer and the decorative film layer are pre-attached while shading is pressed on the base material layer, then rapid forming and attaching and surface pattern decoration of the wear-resistant layer, the decorative film layer and the base material layer are achieved, and the production efficiency is improved.

Description

[Technical field]

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a PETG environmentally friendly floor and a preparation method thereof. [Background technology]

[0002] PVC flooring, as a floor decoration material, uses polyvinyl chloride and its copolymer resin as the main raw materials, with fillers, plasticizers, stabilizers, colorants and other auxiliary materials added. It is produced on a sheet-like continuous substrate through a coating process or a calendering, extrusion or extrusion process.

[0003] However, during the production of PVC flooring, some additives used, such as plasticizers and stabilizers, may pose potential hazards to human health and the environment. For example, some plasticizers may release harmful substances, affecting indoor air quality, while some stabilizers may pollute soil and water sources. Secondly, in high temperature environments, PVC flooring may release harmful substances, and wear, aging or improper handling during use may also release harmful substances, which poses potential risks to human health and the environment. [Summary of the invention]

[0004] The purpose of the invention is to provide a PETG environmentally friendly floor to solve the problem that the existing PVC floor materials have potential hazards during production and use.

[0005] The present invention is achieved by the following technical solutions:

[0006] A PETG environmentally friendly floor, comprising a wear-resistant layer, a decorative film layer, and a substrate layer arranged in sequence;

[0007] Wherein, the wear-resistant layer comprises the following components by weight:

[0008] 80-90 parts of polyethylene terephthalate-1,4-cyclohexanedimethanol;

[0009] 10-15 parts of antioxidants;

[0010] 0.1-0.5 parts of UV absorber;

[0011] Colorant 0.1-0.5 parts;

[0012] The antioxidant is bis(2,4-di-tert-butylphenol)pentaerythritol diphosphite.

[0013] The decorative film layer comprises the following components in parts by weight:

[0014] 90 parts of poly(1,4-cyclohexanedimethyl terephthalate-co-ethylene terephthalate);

[0015] 3 parts of titanium dioxide;

[0016] 6 parts of pigment;

[0017] 1 part solvent.

[0018] The substrate layer comprises the following components in parts by weight:

[0019] 75-80 parts of polyethylene terephthalate-1,4-cyclohexanedimethanol;

[0020] 10-15 parts of toughening agent;

[0021] Lubricant 10-15 parts;

[0022] 270-280 parts of filler.

[0023] The toughening agent is ethylene-methacrylic acid copolymer, the lubricant is pentaerythritol stearate, and the filler is calcium carbonate.

[0024] Among them, the substrate layer adopts polyethylene terephthalate-1,4-cyclohexanedimethanol (PETG) as the main component. PETG is an environmentally friendly thermoplastic polyester material with excellent thermoforming performance, toughness, weather resistance, easy processing, chemical resistance, and will not release harmful substances during use, nor will it deform or produce toxic gases due to heat. Secondly, ethylene-methacrylic acid copolymer is used as a toughening agent to improve the impact strength and low-temperature toughness of the floor. Pentaerythritol stearate is used as a lubricant to improve the fluidity of the material during the preparation process, improve production efficiency and product quality, and then calcium carbonate is used as a filler to improve the dimensional stability of the floor and improve heat resistance. In addition, more preferably, the calcium carbonate is heavy calcium carbonate. Heavy calcium carbonate contains high-purity limestone, which has a higher density and a lower deposition volume than light calcium carbonate, and can increase the volume of the product, thereby saving costs.

[0025] In addition, the wear-resistant layer uses bis(2,4-di-tert-butylphenol) pentaerythritol diphosphite as an antioxidant, which can improve the thermal stability of the polymer and effectively prevent the oxidative degradation of the polymer during processing and use, thereby extending the service life of the material.

[0026] The present invention uses polyethylene terephthalate-1,4-cyclohexanedimethanol to replace traditional PVC materials, thereby reducing potential risks to human health and the environment. Secondly, by using similar components in the wear-resistant layer, the decorative film layer and the substrate layer, the three can be tightly fitted in a similar and fusion manner during the rolling process without the need for additional adhesives, thereby improving production efficiency and reducing production costs. Finally, through the coordination of other additives and the design of a multi-layer structure, the wear resistance, decorativeness and structural stability of the floor can be enhanced, and the service life of the floor can be extended.

[0027] Preferably, the PETG environmentally friendly floor further comprises a UV layer arranged on one side of the wear-resistant layer;

[0028] The UV layer comprises the following components by weight:

[0029] 20-30 parts of acrylic resin;

[0030] 3-5 parts of photoinitiator;

[0031] 5-10 parts of filler;

[0032] The acrylic resin is one or more of polyurethane acrylate, 1,6-hexanediol diacrylate, silicone acrylate resin, and trimethylolpropane triacrylate;

[0033] The photoinitiator is hydroxycyclohexane phenone;

[0034] The filler is one or more combinations of ceramic powder, silicon dioxide, and silicon dioxide micropowder.

[0035] Preferably, the thickness of the UV layer is 0.01 to 0.03 mm;

[0036] The thickness of the wear-resistant layer is 0.07 to 1.0 mm;

[0037] The thickness of the decorative layer is 0.07-0.12 mm;

[0038] The thickness of the substrate layer is 1 to 9 mm.

[0039] Preferably, the PETG environmentally friendly floor further comprises a backing layer arranged on one side of the substrate layer, and the thickness of the backing layer is 0.8-3 mm.

[0040] Preferably, the density of the PETG environmentally friendly floor is 1.9-2.1g / cm 3The heating dimensional change rate of the PETG environmentally friendly floor is 0.11%. The heating dimensional change rate is a direct indicator for evaluating the stability of the floor. The smaller the heating dimensional change, the smaller the value of the floor's dimensional expansion or contraction in a high temperature environment, the better the locking stability of the floor, and the more stable the installation and use.

[0041] The present invention also provides a method for preparing the PETG environmentally friendly floor, comprising the following steps:

[0042] S1. Preparation of substrate: according to the preparation ratio, the substrate raw material is added, the substrate raw material is heated and stirred by a high-speed stirrer, the substrate raw material is cooled and stirred by a low-speed stirrer, and the substrate raw material after cooling is melted by an extruder until the substrate raw material is uniformly plasticized to obtain a plasticized substrate;

[0043] S2, substrate molding: transporting the plasticized substrate in step S1 from the extruder to the mold flow distributor, and extruding through the mold flow distributor to form a substrate structure to obtain a substrate layer;

[0044] S3, pre-lamination: laminating the decorative layer and the wear-resistant layer to the surface of the substrate layer in sequence by a servo film feeding roller and a roller press, and pressing a shading pattern on the lower surface of the substrate layer by a roller press to obtain a semi-finished product;

[0045] S4, floor molding: using a roller press to press surface textures on the wear-resistant layer surface of the semi-finished product in step S3 to obtain a PETG environmentally friendly floor.

[0046] Specifically, as attached Figure 1 As shown, the pre-lamination process of step S3 is as follows: the substrate layer coming out of the extrusion die 20 is conveyed to the thickness setting rollers 16 and 17 to set the thickness of the substrate, the substrate layer is conveyed to the pre-lamination roller 14 to be pre-laminated with the decorative layer, and then conveyed to the film pressing roller (rubber roller) 13 to laminate the wear-resistant layer and the decorative layer, and at the same time, a shading roller 15 is used to press and form a shading on the lower surface of the substrate layer, and finally the semi-finished product is conveyed between the rubber roller 19 and the embossing roller 18, and the surface texture is pressed on the surface of the wear-resistant layer by the embossing roller 18 to obtain the PETG environmentally friendly floor.

[0047] The decorative layer is transported from the color film roller holders 5 and 6 to the pre-laminating roller 14 through the flattening rollers 7, 8, and 9 for pre-laminating with the substrate layer. The wear-resistant layer is transported from the PETG wear-resistant roller holders 1 and 2 to the laminating roller 13 through the flattening rollers 3, 4, and 10, the preheating roller 11, and the laminating roller 12 for laminating with the decorative layer and the substrate layer.

[0048] Preferably, in step S1, the stirring speed of the high-speed stirrer is 50-120 kg / min, and the stirring temperature is 115-125°C, and the stirring speed of the low-speed stirrer is 200-300 kg / min, and the stirring temperature is 45-55°C.

[0049] This method uses a high-speed mixer to heat up and stir. By optimizing its stirring speed and stirring temperature, the base material raw materials can be effectively mixed, evenly dispersed, and some raw materials can be prompted to enter the pre-plasticization stage. However, if the stirring speed is not adjusted at this time, the plasticization of the raw materials may be accelerated, resulting in over-plasticization. Therefore, this method uses a low-speed mixer to cool down and stir to slow down the over-plasticization of the raw materials and ensure that the base material raw materials are in an appropriate plasticized state before entering the extruder. In addition, the efficiency of the high-speed mixer is much higher than that of the extruder. If the stirring speed is not adjusted, a large amount of raw materials will quickly flow into the screw and mold of the extruder, which is likely to cause equipment failures such as screw locking and mold blocking. By optimizing the stirring speed and temperature, the base material raw materials can be fully mixed, pre-plasticized and stably plasticized, while improving production efficiency and safety.

[0050] The beneficial effects of the present invention are as follows:

[0051] The present invention provides a PETG environmentally friendly floor. First, by using polyethylene terephthalate-1,4-cyclohexanedimethanol ester to replace traditional PVC materials, a more environmentally friendly and harmless material is provided, reducing potential risks to human health and the environment. Secondly, by using similar components in the wear-resistant layer, the decorative film layer and the substrate layer, the three can be tightly fitted in a similar and fusion manner during the rolling process without the need to use additional adhesives, thereby improving production efficiency and reducing production costs. Finally, through the coordination of other additives and the design of a multi-layer structure, the wear resistance, decorativeness and structural stability of the floor can be enhanced, and the service life of the floor can be extended. The present invention solves the problem of potential hazards in the production and use of existing PVC floor materials.

[0052] The present invention also provides a method for preparing the PETG environmentally friendly floor. First, a high-speed mixer is used to heat and stir to promote the preliminary mixing and plasticization of the raw materials, and then a low-speed mixer is used to cool and stir to prevent the raw materials from being over-plasticized and ensure uniform mixing of the raw materials. Through the cooperation of the high-speed mixer and the low-speed mixer, the plasticization effect of the substrate raw materials can be better achieved to prevent the substrate raw materials from being over-plasticized and to prevent damage to the equipment. Secondly, through the design of the roller press, the wear-resistant layer and the decorative film layer are pre-laminated while the base layer is pressed with the shading, thereby realizing the rapid molding and lamination of the three and the surface pattern decoration, thereby improving production efficiency.

Brief Description of the Drawings

[0053] Figure 1This is a flow chart of the method for preparing the PETG environmentally friendly floor of the present invention;

[0054] Wear-resistant roller brackets - 1, 2; flattening rollers 3, 4, 7, 8, 9, 10; color film roller brackets - 5, 6; preheating roller - 11; film pressing rollers - 12, 13; pre-laminating roller - 14; shading roller - 15; thickness setting rollers - 16, 17; embossing roller - 18; rubber roller - 19; extrusion die - 20; screw - 22. [Specific implementation method]

[0055] The specific technical scheme of the present invention is described below in conjunction with Examples 1-3:

[0056] Example 1

[0057] A method for preparing the PETG environmentally friendly floor comprises the following steps:

[0058] S1. Substrate preparation: According to Table 1, a substrate raw material is added, and the substrate is heated and stirred for 6 minutes at a stirring speed of 50 kg / min and a stirring temperature of 115° C. by a high-speed stirrer, and cooled and stirred for 18 minutes at a stirring speed of 220 kg / min and a stirring temperature of 46° C. by a low-speed stirrer, and then the substrate raw material after cooling is melted by an extruder until the substrate raw material reaches a uniformly plasticized state to obtain a plasticized substrate;

[0059] S2, substrate molding: transporting the plasticized substrate in step S1 from the extruder to the mold flow distributor, and extruding through the mold flow distributor to form a substrate structure to obtain a substrate layer;

[0060] S3, pre-lamination: laminating the decorative layer and the wear-resistant layer to the surface of the substrate layer in sequence by a servo film feeding roller and a roller press, and pressing a shading pattern on the lower surface of the substrate layer by a roller press to obtain a semi-finished product;

[0061] S4, floor molding: using a roller press to press surface textures on the wear-resistant layer surface of the semi-finished product in step S3 to obtain a PETG environmentally friendly floor.

[0062] Example 2

[0063] A method for preparing the PETG environmentally friendly floor comprises the following steps:

[0064] S1. Substrate preparation: According to Table 1, a substrate raw material is added, and the substrate is heated and stirred for 6 minutes at a stirring speed of 50 kg / min and a stirring temperature of 118° C. by a high-speed stirrer, and cooled and stirred for 15 minutes at a stirring speed of 220 kg / min and a stirring temperature of 45° C. by a low-speed stirrer, and then the substrate raw material after cooling is melted by an extruder until the substrate raw material reaches a uniformly plasticized state to obtain a plasticized substrate;

[0065] S2, substrate molding: transporting the plasticized substrate in step S1 from the extruder to the mold flow distributor, and extruding through the mold flow distributor to form a substrate structure to obtain a substrate layer;

[0066] S3, pre-lamination: laminating the decorative layer and the wear-resistant layer to the surface of the substrate layer in sequence by a servo film feeding roller and a roller press, and pressing a shading pattern on the lower surface of the substrate layer by a roller press to obtain a semi-finished product;

[0067] S4, floor molding: using a roller press to press surface textures on the wear-resistant layer surface of the semi-finished product in step S3 to obtain a PETG environmentally friendly floor.

[0068] Example 3

[0069] A method for preparing the PETG environmentally friendly floor comprises the following steps:

[0070] S1. Preparation of substrate: According to Table 1, the substrate raw material is added, and the substrate is heated and stirred for 6 minutes at a stirring speed of 60 kg / min and a stirring temperature of 120° C. by a high-speed stirrer, and the substrate is cooled and stirred for 20 minutes at a stirring speed of 220 kg / min and a stirring temperature of 50° C. by a low-speed stirrer, and the substrate raw material after cooling is melted by an extruder until the substrate raw material is uniformly plasticized to obtain a plasticized substrate;

[0071] S2, substrate molding: transporting the plasticized substrate in step S1 from the extruder to the mold flow distributor, and extruding through the mold flow distributor to form a substrate structure to obtain a substrate layer;

[0072] S3, pre-lamination: laminating the decorative layer and the wear-resistant layer to the surface of the substrate layer in sequence by a servo film feeding roller and a roller press, and pressing a shading pattern on the lower surface of the substrate layer by a roller press to obtain a semi-finished product;

[0073] S4, floor molding: using a roller press to press surface textures on the wear-resistant layer surface of the semi-finished product in step S3 to obtain a PETG environmentally friendly floor.

[0074] The PETG environmentally friendly floor obtained in Examples 1-3 is directly coated with a UV layer on the wear-resistant layer surface of the PETG environmentally friendly floor through a paint line, and then the backing layer is attached to the bottom layer of the substrate layer using environmentally friendly hot melt adhesive to obtain a PETG environmentally friendly floor product.

[0075] Comparative Example 1

[0076] A method for preparing the PETG environmentally friendly floor comprises the following steps:

[0077] S1. Substrate preparation: According to Table 1, the substrate raw material is added, and the substrate raw material is heated and stirred for 6 minutes at a stirring speed of 50 kg / min and a stirring temperature of 122° C. by a high-speed stirrer, and then the substrate raw material after cooling is melted by an extruder until the substrate raw material reaches a uniform plasticized state to obtain a plasticized substrate;

[0078] S2, substrate molding: transporting the plasticized substrate in step S1 from the extruder to the mold flow distributor, and extruding through the mold flow distributor to form a substrate structure to obtain a substrate layer;

[0079] S3, pre-lamination: laminating the decorative layer and the wear-resistant layer to the surface of the substrate layer in sequence by a servo film feeding roller and a roller press, and pressing a shading pattern on the lower surface of the substrate layer by a roller press to obtain a semi-finished product;

[0080] S4, floor molding: using a roller press to press surface textures on the wear-resistant layer surface of the semi-finished product in step S3 to obtain a PETG environmentally friendly floor.

[0081] The PETG environmentally friendly floor obtained in comparative example 1 is directly coated with a UV layer on the wear-resistant layer surface of the PETG environmentally friendly floor through a paint line, and then the backing layer is attached to the bottom layer of the substrate layer using environmentally friendly hot melt adhesive to obtain a PETG environmentally friendly floor product.

[0082] Comparative Examples 2-3 are commercially available PVC floors.

[0083] Table 1 Composition ratio of Examples 1-3 and Comparative Example 1

[0084]

[0085]

[0086] Table 2 Thickness of each layer in Examples 1-3 and Comparative Example 1

[0087]

[0088] The above-mentioned embodiments 1-3 and comparative examples 1-3 were subjected to performance tests. The test conditions were as follows and the test data are shown in Table 3.

[0089] Heating dimensional change rate: Place the PETG environmentally friendly floor sample in an oven and heat it at 80°C for 6 hours. Measure the length change between two specified length marks in the longitudinal and transverse directions of the sample, and calculate the heating dimensional change rate.

[0090] Table 3 Test data of PETG environmentally friendly floor of Examples 1-3 and Comparative Examples 1-3

[0091]

[0092] As shown in Table 3, compared with the commercially available PVC flooring of Comparative Examples 2-3, the PETG environmentally friendly flooring of Examples 1-3 has lower density and heating dimensional change rate. Compared with Comparative Example 1 without using a low temperature mixer, the PETG environmentally friendly flooring of Example 1 has lower density and heating dimensional change rate.

[0093] Among them, lower density means that the use of raw materials can be reduced in the production process, and lower heating dimensional change rate means that PETG flooring has excellent heat resistance and stability, and can be used in various high temperature environments and in various places, such as homes, offices, commercial spaces, etc., to meet the performance requirements of different environments for flooring.

[0094] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A PETG environmentally friendly floor, characterized by: It includes a wear-resistant layer, a decorative film layer, and a substrate layer which are arranged in sequence; Wherein, the substrate layer comprises the following components by weight: 75-80 parts of polyethylene terephthalate-1,4-cyclohexanedimethanol; 10-15 parts of toughening agent; Lubricant 10-15 parts; 270-280 parts of filler.

2. The PETG environmentally friendly floor according to claim 1, characterized in that: The toughening agent is ethylene-methacrylic acid copolymer, the lubricant is pentaerythritol stearate, and the filler is calcium carbonate.

3. The PETG environmentally friendly floor according to claim 1, characterized in that: The decorative film layer comprises the following components in parts by weight: 90 parts of poly(1,4-cyclohexanedimethyl terephthalate-co-ethylene terephthalate); 3 parts of titanium dioxide; 6 parts of pigment; 1 part solvent.

4. The PETG environmentally friendly floor according to claim 1, characterized in that: The wear-resistant layer comprises the following components by weight: 80-90 parts of polyethylene terephthalate-1,4-cyclohexanedimethanol; 10-15 parts of antioxidants; 0.1-0.5 parts of UV absorber; Colorant 0.1-0.5 parts; The antioxidant is bis(2,4-di-tert-butylphenol)pentaerythritol diphosphite.

5. The PETG environmentally friendly floor according to claim 1, characterized in that: The PETG environmentally friendly floor further comprises a UV layer arranged on one side of the wear-resistant layer; The UV layer comprises the following components by weight: 20-30 parts of acrylic resin; 3-5 parts of photoinitiator; 5-10 parts of filler; The acrylic resin is one or more of polyurethane acrylate, 1,6-hexanediol diacrylate, silicone acrylate resin, and trimethylolpropane triacrylate; The photoinitiator is hydroxycyclohexane phenone; The filler is one or more combinations of ceramic powder, silicon dioxide, and silicon dioxide micropowder.

6. The PETG environmentally friendly floor according to claim 5, characterized in that: The thickness of the UV layer is 0.01 to 0.03 mm; The thickness of the wear-resistant layer is 0.07 to 1.0 mm; The thickness of the decorative layer is 0.07-0.12 mm; The thickness of the substrate layer is 1 to 9 mm.

7. The PETG environmentally friendly floor according to claim 1, characterized in that: The PETG environmentally friendly floor further comprises a backing layer arranged on one side of the substrate layer, and the thickness of the backing layer is 0.8-3 mm.

8. The PETG environmentally friendly floor according to claim 1, characterized in that: The density of the PETG environmentally friendly floor is 1.9-2.1g / cm 3 The heating size change rate of the PETG environmentally friendly floor is 0.11%.

9. The method for preparing the PETG environmentally friendly floor according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Preparation of substrate: according to the preparation ratio, the substrate raw material is added, the substrate raw material is heated and stirred by a high-speed stirrer, the substrate raw material is cooled and stirred by a low-speed stirrer, and the substrate raw material after cooling is melted by an extruder until the substrate raw material is uniformly plasticized to obtain a plasticized substrate; S2, substrate molding: transporting the plasticized substrate in step S1 from the extruder to the mold flow distributor, and extruding through the mold flow distributor to form a substrate structure to obtain a substrate layer; S3, pre-lamination: laminating the decorative layer and the wear-resistant layer to the surface of the substrate layer in sequence by a servo film feeding roller and a roller press, and pressing a shading pattern on the lower surface of the substrate layer by a roller press to obtain a semi-finished product; S4, floor molding: using a roller press to press surface textures on the wear-resistant layer surface of the semi-finished product in step S3 to obtain a PETG environmentally friendly floor.

10. The PETG environmentally friendly floor according to claim 9, characterized in that: In step S1, the stirring speed of the high-speed stirrer is 50-120 kg / min, and the stirring temperature is 115-125°C; the stirring speed of the low-speed stirrer is 200-300 kg / min, and the stirring temperature is 45-55°C.

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