TWI805220B - Stone plastic composite floor and preparation method thereof - Google Patents

Abstract

The present invention relates to a stone plastic composite floor and a preparation method thereof, which comprises a substrate layer, a first printing layer disposed above the substrate layer, and a anti-slip layer disposed below the substrate layer; in addition, the first printing layer may further include a Wear-resistant layer. The substrate layer mainly contains plastic alloy and stone powder, the anti-slip layer is composed of thermoplastic polyester elastomer, the first printing layer contains polyethylene and/or ethylene-vinyl acetate copolymer, and the wear-resistant layer is composed of polyethylene terephthalate. The preparation method of stone plastic composite floor includes mixing polyethylene, polyethylene terephthalate, stone powder and auxiliary agent and then granulating, extruding to make the substrate layer, and then co-extruding together with the anti-slip layer; the first printing layer is formed on the substrate layer to make a stone plastic composite floor; in addition, a wear-resistant layer can be further formed on the first printing layer.

Description

Stone-plastic floor and preparation method thereof

The invention relates to a stone-plastic floor and its preparation method, in particular to a stone-plastic floor using waste fabric as a material source and its preparation method.

In recent years, all kinds of fast fashion and online shopping have become popular, especially due to the impact of the new crown pneumonia epidemic, which has accelerated the dramatic changes in consumer behavior, resulting in the global production of textile products such as clothes, pants, shoes, hats, and various backpacks, handbags, etc. The volume has increased year by year, and the average purchase volume per person has increased significantly.

Since online shopping does not need to set up a physical store, the goods can be purchased at a lower price, resulting in a faster replacement of all kinds of shoes, hats and clothes. This new form of consumption has swept the world, causing more waste. And cause harm to the earth's ecology.

When environmental protection issues are getting more and more attention, reducing the use, recycling and recycling of various textile products has become an important topic all over the world.

In addition, the floor is a necessary decoration material in the building, and the floor materials selected according to different types of buildings and places are different, such as polyvinyl chloride (PVC) floor, wooden floor, polyethylene terephthalate (PET ) floor, etc. Although there are many kinds of floors made of different materials on the market, most of them are made of materials containing halogen components such as PVC due to cost considerations. The floor made of this kind of material cannot be recycled, and it must be disposed of at a large cost and buried. After burning, it will produce toxic gases that pollute the environment and cause poison to the human body. Therefore, the use of non-toxic, environmentally friendly, and low-cost recyclable materials has become an issue to be overcome.

In view of the above problems, the creators of the present invention conceived and designed a stone-plastic floor and its preparation method, using various waste textile products as materials for the stone-plastic floor, in order to reduce the waste caused by various textile products and the impact on the environment. Pollution, and the use of non-toxic components and recyclable materials to reduce costs and be environmentally friendly to make stone-plastic flooring, so as to reduce the amount of petrochemical materials, damage to the environment and waste of natural resources.

The first aspect of the present invention is to provide a stone-plastic floor. The stone-plastic floor includes a base material layer, a first printing layer disposed above the base material layer, and a first printing layer disposed below the base material layer. Sliding layer; In addition, a wear-resistant layer may be further provided above the first printing layer.

The base material layer mainly includes plastic alloy and stone powder, and various auxiliary agents such as compatibilizers, toughening agents, lubricants, water absorbing agents, and antioxidants; preferably, the thickness of the base material layer is 4-8mm. Wherein, the plastic alloy includes polyethylene (polyethylene, PE) and polyethylene terephthalate (polyethylene terephthalate, PET), and its sources are mainly discarded clothes, trousers, shoes, hats and various backpacks, handbags, etc. Cloth; preferably, based on the weight of the substrate layer, the plastic alloy and the various auxiliary agents account for 35-55% in total. In addition, in the plastic alloy, the content ratio of the polyethylene to the polyethylene terephthalate is 6:4 to 8:2.

Optionally, the stone powder is selected from calcium carbonate, white clay, montmorillonite, silica or talc, and the smaller the particle size of the stone powder, the better its coating with the components in the substrate layer; preferably Preferably, the particle size of the stone powder is 300-1500 mesh. Preferably, based on the weight of the substrate layer, the stone powder accounts for 45-65%.

Optionally, the compatibilizer is selected from styrene-ethylene-butylene-styrene copolymer (SEBS), styrene-butylene-styrene copolymer (SBS), ethylene-propylene-diene rubber (EPDM), Polyethylene grafted maleic anhydride (PE-g-MAH), polyethylene grafted glycidyl methacrylate (PE-g-GMA), polyolefin elastomer grafted maleic anhydride (POE-g-MAH) or A group consisting of polyolefin elastomer grafted with glycidyl methacrylate (POE-g-GMA). Described compatibilizer utilizes its all compatible characteristic with polyethylene, polyethylene terephthalate, thus forms the blend (being plastics) of polyethylene, polyethylene terephthalate and compatibilizer alloy); preferably, based on the weight of the substrate layer, the compatibilizer accounts for 2-6%.

Optionally, the toughening agent is selected from thermoplastic polyester elastomer (TPEE) or polyolefin elastomer (POE); preferably, based on the weight of the substrate layer, the toughening agent accounts for 8 to 12 %.

Optionally, the slip agent is selected from montan wax; preferably, based on the weight of the substrate layer, the slip agent accounts for 0.3-0.7%.

Optionally, the water-absorbing agent is selected from calcium oxide powder; preferably, based on the weight of the substrate layer, the water-absorbing agent accounts for 3-7%.

Optionally, the antioxidant is selected from pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate (Irganox ^® 1010); preferably, based on the weight of the substrate layer, the The above antioxidants account for 0.3-0.7%.

The anti-slip layer is composed of thermoplastic polyester elastomer (TPEE), preferably, the thickness of the anti-slip layer is 1-5mm. In addition, the thermoplastic polyester elastomer used in the anti-slip layer can further add a foaming agent to make the thermoplastic polyester elastomer (TPEE) micro-foamed (slightly expand in volume), and its specific gravity is reduced to have It has the effect of cushioning and sound insulation; preferably, the thermoplastic polyester elastomer used in the anti-slip layer is added with a foaming agent to reduce the specific gravity to 0.4~0.6.

The first printing layer is composed of a coating layer and a pigment layer, the coating layer faces the substrate layer, and the pigment layer is located above the coating layer.

The coating layer comprises low-density polyethylene (LDPE), polyolefin elastomer (POE), ethylene-vinyl acetate copolymer (EVA) or any combination thereof; preferably, the coating layer is selected from low-density The melting point of polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer or any combination thereof is 90-140°C; preferably, the coating layer has a thickness of 30-80 μm.

The pigment layer is composed of low melting point polyethylene terephthalate; preferably, the melting point of the low melting point polyethylene terephthalate is 130~170°C; preferably, the pigment layer The thickness is 30~50μm.

Furthermore, in order to block the background color of the base material layer, a white second printing layer can be further laminated between the base material layer and the first printing layer; the composition of the second printing layer The composition, melting point range and thickness are the same as those of the first printing layer, and will not be repeated here.

The wear-resistant layer is composed of polyethylene terephthalate, which has a high crystallization rate, good optical transparency and wear resistance, and its wear resistance is higher than that of general polyvinyl chloride (PVC) ) 2 times that of the wear-resistant layer, so polyethylene terephthalate is selected as the wear-resistant layer. Preferably, the melting point of polyethylene terephthalate in the wear-resistant layer is 170-180° C.; preferably, the thickness of the wear-resistant layer is 200-500 μm.

The second aspect of the present invention is to provide a method for preparing a stone-plastic floor, comprising the following steps: Step S1: Put polyethylene, polyethylene terephthalate, stone powder and various auxiliary agents in a high-speed mixer for uniform mixing and volatilize the water to form the first mixture; Step S2: Put the first mixture in a twin-screw extruder Pelletizing in the extruder to form substrate layer pellets; Step S3: Put the substrate layer pellets and the thermoplastic polyester elastomer material as the anti-slip layer in the co-extrusion extruder for co-extrusion to obtain the integrated base Material layer and anti-slip layer; Step S4: Place the first printing layer on the base material layer, use a heat press laminating machine to bond the first printing layer on the base material layer, and use a double roller flattener to press the second printing layer A printing layer is evenly pasted on the substrate layer to obtain an uncut stone-plastic plate; step S5: After cutting the uncut stone-plastic plate into the required size, use a ditch cleaning machine to trim the periphery of the cut stone-plastic plate, That is to get the stone-plastic floor.

In step S1, the main sources of the polyethylene and the polyethylene terephthalate are clothes, trousers, shoes, hats, and various backpacks, handbags and other waste fabrics; preferably, the base Based on the weight of the material layer, the plastic alloy and the various auxiliary agents account for 35-55% in total. In addition, in the plastic alloy, the content ratio of the polyethylene to the polyethylene terephthalate is 6:4 to 8:2. The auxiliary agent includes compatibilizer, toughening agent, slippery agent, water absorbing agent and antioxidant.

Optionally, the stone powder is selected from calcium carbonate, clay, montmorillonite, silica or talc; preferably, the particle size of the stone powder is 300-1500 mesh. Preferably, based on the weight of the substrate layer, the stone powder accounts for 45-65%.

Optionally, the compatibilizer is selected from styrene-ethylene-butylene-styrene copolymer, styrene-butylene-styrene copolymer, EPDM rubber, polyethylene grafted maleic anhydride, poly Vinyl grafted methyl A group consisting of glycidyl acrylate, polyolefin elastomer grafted maleic anhydride or polyolefin elastomer grafted glycidyl methacrylate; preferably, based on the weight of the substrate layer, the compatibilizer Accounted for 2~6%.

Optionally, the toughening agent is selected from thermoplastic polyester elastomer or polyolefin elastomer; preferably, based on the weight of the substrate layer, the toughening agent accounts for 8-12%.

Optionally, the slip agent is selected from montan wax; preferably, based on the weight of the substrate layer, the slip agent accounts for 0.3-0.7%.

Optionally, the water-absorbing agent is selected from calcium oxide powder; preferably, based on the weight of the substrate layer, the water-absorbing agent accounts for 3-7%.

Optionally, the antioxidant is selected from pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate (Irganox ^® 1010); preferably, based on the weight of the substrate layer, the The above antioxidants account for 0.3-0.7%.

In step S2, the screw length-to-diameter ratio of the twin-screw extruder is 48-56. When the screw length-to-diameter ratio is larger, it can increase the temperature division to improve the mixing of the components in the first mixture And gradually cool down slowly. Since the highest melting point of the first mixture is polyethylene terephthalate (250°C), the initial feed temperature is set slightly higher than 250°C and gradually lowered at 270°C, so that each component is completely melted Mix to improve the mixing of the ingredients.

In step S3, the co-extrusion extruder can be adjusted by the die screw at the exit to set the thickness of the base material layer and the anti-slip layer, and maintain the base material layer at 150°C after co-extrusion, In order to facilitate the subsequent lamination of the printing layer. Preferably, the thickness of the substrate layer is 4-8 mm, and the thickness of the anti-slip layer is 1-5 mm. In addition, in order to make the anti-slip layer have the effect of cushioning and sound insulation, the thermoplastic polyester elastomer that can be used in the anti-slip layer can further add a foaming agent to make the thermoplastic polyester elastomer slightly foamed (slightly expands in volume) ) to reduce its specific gravity; preferably, after adding foaming agent to the thermoplastic polyester elastomer used in the anti-slip layer, the specific gravity is reduced to 0.4~0.6.

In step S4, the first printing layer is composed of a coating layer and a pigment layer, the coating layer faces the substrate layer, and the pigment layer is located above the coating layer.

The coating layer comprises low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer or any combination thereof; preferably, the coating layer is selected from low-density polyethylene, polyolefin elastomer, ethylene - The melting point of vinyl acetate copolymer or any combination thereof is 90~140°C, which is lower than the temperature of 150°C maintained by the base material layer after co-extrusion in step S3, so that the coating layer can be melted and bonded On the substrate layer; preferably, the coating layer has a thickness of 30-80 μm.

The pigment layer is composed of low melting point polyethylene terephthalate; preferably, the melting point of the low melting point polyethylene terephthalate is 130~170°C; preferably, the pigment layer The thickness is 30~50μm.

Moreover, in order to block the background color of the base material layer, in step S4, a white second printing layer can be further laminated between the base material layer and the first printing layer; The composition, melting point range and thickness of the second printing layer are the same as those of the first printing layer, and will not be repeated here.

In addition, in order to make the surface of the stone-plastic floor have better wear resistance, in step S4, a wear-resistant layer can be further pasted on the first printing layer, and the wear-resistant layer is made of polyethylene terephthalate Composition, its wear resistance is twice that of general PVC wear-resistant layer, and has good optical transparency. Preferably, the melting point of polyethylene terephthalate in the wear-resistant layer is 170-180° C.; preferably, the thickness of the wear-resistant layer is 200-500 μm.

To sum up, the stone-plastic floor requested by the present invention can use various waste textile products as its materials, in order to reduce the waste caused by various textile products and the pollution to the environment; and use no toxic ingredients and The cost-reducing and environmentally friendly materials can be recycled repeatedly to reduce the amount of petrochemical materials used, damage to the environment and waste of natural resources.

1: Stone plastic floor

2: Substrate layer

3: Anti-slip layer

4: The first printing layer

41: coating layer

42: Pigment layer

5: Second printing layer

6: Wear-resistant layer

S1~S5: steps

Figure 1 is a structural schematic diagram of the stone-plastic floor of the present invention; Figure 2 is a structural schematic diagram of the first printing layer of the present invention; Figure 3 is a structural schematic diagram of the stone-plastic floor with the second printing layer of the present invention; Figure 4 is a structural schematic diagram of a stone-plastic floor with a wear-resistant layer of the present invention; Figure 5 is a schematic structural view of a stone-plastic floor with a wear-resistant layer and a second printing layer of the present invention; Figure 6 is a schematic diagram of the present invention Schematic diagram of the preparation process of the stone-plastic floor.

The following content will be combined with drawings to illustrate the technical content of the present invention through specific embodiments, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various modifications and changes may be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having definitions consistent with their meanings in the context of the relevant art and the present invention, and will not be construed as idealistic or overly formal unless otherwise expressly defined herein.

Please refer to Figure 1. Figure 1 is a schematic diagram of the structure of the stone-plastic floor of the present invention. The stone-plastic floor 1 comprises a substrate layer 2, a first printing layer 4 arranged above the substrate layer 2, and a The anti-slip layer 3 below the substrate layer; the substrate layer 2 mainly includes plastic alloy and stone powder, and various auxiliary agents such as compatibilizers, toughening agents, slip agents, water absorbing agents, and antioxidants; preferably, The thickness of the substrate layer 2 is 4-8mm; more preferably, the thickness of the substrate layer 2 is 4.5mm. Wherein, the plastic alloy includes polyethylene and polyethylene terephthalate, and its sources are mainly waste fabrics such as clothes, trousers, shoes, hats, and various backpacks and handbags. Preferably, based on the weight of the substrate layer 2, the plastic alloy and the various auxiliary agents account for 35-55%; more preferably, the plastic alloy and the various auxiliary agents account for 40%. In addition, the content ratio of the polyethylene and the polyethylene terephthalate is 6:4 to 8:2; preferably, the polyethylene and the polyethylene terephthalate The content ratio is 7:3.

Optionally, the stone powder is selected from calcium carbonate, white clay, montmorillonite, silica or talc, and the smaller the particle size of the stone powder, the better its coating with the components in the base material layer 2; Preferably, the particle size of the stone powder is 300-1500 mesh; more preferably, due to cost considerations, the particle size of the stone powder is 300 mesh. Preferably, based on the weight of the substrate layer 2, the stone powder accounts for 45-65%; more preferably, the stone powder accounts for 60%.

Optionally, the compatibilizer is selected from styrene-ethylene-butylene-styrene copolymer, styrene-butylene-styrene copolymer, EPDM rubber, polyethylene grafted maleic anhydride, poly A group consisting of ethylene grafted glycidyl methacrylate, polyolefin elastomer grafted maleic anhydride or polyolefin elastomer grafted glycidyl methacrylate. Described compatibilizer utilizes its all compatible characteristic with polyethylene, polyethylene terephthalate, thus forms the blend (being plastics) of polyethylene, polyethylene terephthalate and compatibilizer alloy); preferably, based on the weight of the substrate layer 2, the compatibilizer accounts for 2-6%; more preferably, the compatibilizer accounts for 4%.

Optionally, the toughening agent is selected from thermoplastic polyester elastomer or polyolefin elastomer; preferably, based on the weight of the substrate layer 2, the toughening agent accounts for 8-12%; more preferably , the toughening agent accounts for 10%.

Optionally, the slip agent is selected from montan wax; preferably, based on the weight of the substrate layer 2, the slip agent accounts for 0.3-0.7%; more preferably, the slip agent accounts for 0.5%.

Optionally, the water-absorbing agent is selected from calcium oxide powder; preferably, based on the weight of the substrate layer 2, the water-absorbing agent accounts for 3-7%; more preferably, the water-absorbing agent accounts for 5%.

Optionally, the antioxidant is selected from tetrakis(3,5-di-tert-butyl-4-hydroxy)pentaerythritol phenylpropionate (Irganox ^® 1010); preferably, based on the weight of the substrate layer 2, The antioxidant accounts for 0.3-0.7%; more preferably, the antioxidant accounts for 0.5%.

The anti-slip layer 3 is composed of thermoplastic polyester elastomer. Preferably, the thickness of the anti-slip layer 3 is 1-5 mm; more preferably, the thickness of the anti-slip layer 3 is 2 mm. In addition, the thermoplastic polyester elastomer used in the anti-slip layer 3 can further add a foaming agent to make the thermoplastic polyester elastomer micro-foam (slightly expand in volume), reduce its specific gravity and have the effect of cushioning and sound insulation; Preferably, the thermoplastic polyester elastomer used in the anti-slip layer 3 is added with a foaming agent to reduce the specific gravity to 0.4~0.6; more preferably, the thermoplastic polyester elastomer used in the anti-slip layer 3 is added with a foaming agent After that, the specific gravity was reduced to 0.4.

Please also refer to Figure 2, which is a schematic diagram of the structure of the first printing layer of the present invention. The first printing layer 4 is composed of a coating layer 41 and a pigment layer 42 , the coating layer 41 faces the substrate layer 2 , and the pigment layer 42 is located above the coating layer 41 .

The coating layer 41 comprises low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer or any combination thereof; preferably, the coating layer 41 is selected from low-density polyethylene, polyolefin elastomer , ethylene-vinyl acetate copolymer or polymers in any combination thereof have a melting point of 90-140°C; more preferably, the coating layer 41 is selected from low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate The melting point of the copolymer or any combination thereof is 90-130°C. Preferably, the coating layer 41 has a thickness of 30-80 μm.

The pigment layer 42 is composed of low melting point polyethylene terephthalate; preferably, the melting point of the low melting point polyethylene terephthalate is 130~170°C; preferably, the pigment The layer thickness is 30~50μm.

Please refer to Figure 3, which is a schematic diagram of the structure of the stone-plastic floor with the second printing layer of the present invention. In order to block the background color of the base material layer 2, a white second printing layer 5 can be further bonded between the base material layer 2 and the first printing layer 4; the second printing layer 5 The composition, melting point range and thickness are the same as those of the first printing layer 4 and will not be repeated here.

Please refer to Figure 4, Figure 4 is a schematic diagram of the structure of the stone-plastic floor with a wear-resistant layer of the present invention. In order to make the surface of the stone-plastic floor 1 have better wear resistance, a wear-resistant layer 6 can be further arranged above the first printing layer 4, and the wear-resistant layer 6 is composed of polyethylene terephthalate, polyethylene terephthalate Ethylene phthalate has a high crystallization rate, good optical transparency and wear resistance, and its wear resistance is twice that of general polyvinyl chloride wear-resistant layer, so polyethylene terephthalate is selected as the wear-resistant layer. Layer 6. Preferably; the melting point of polyethylene terephthalate in the wear-resistant layer is 170-180°C; preferably, the thickness of the wear-resistant layer 6 is 200-500 μm; more preferably, the wear-resistant Layer 6 has a thickness of 250 μm.

Please refer to Figure 5, Figure 5 is a schematic diagram of the structure of the stone-plastic floor with a wear-resistant layer and a second printing layer of the present invention. In order to cover the background color of the base material layer 2 and make the surface of the stone-plastic floor 1 have better wear resistance, another layer can be further bonded between the base material layer 2 and the first printing layer 4 at the same time The second printing layer 5 is white, and a wear-resistant layer 6 is arranged above the first printing layer.

Please refer to Figure 6, which is a schematic diagram of the preparation process of the stone-plastic flooring of the present invention. It includes the following steps: Step S1: Put polyethylene, polyethylene terephthalate, stone powder and various auxiliary agents in a high-speed mixer to uniformly mix and volatilize their water to form a first mixture; Step S2: Pelletizing the first mixture in a twin-screw extruder to form pellets for the substrate layer; Step S3: Put the pellets for the substrate layer and the thermoplastic polyester elastomer material as the anti-slip layer together Co-extruded by extrusion machine to obtain integrally formed substrate layer and anti-slip layer; Step S4: Place the first printed layer on top of the substrate layer, and bond the first printed layer to the substrate with a heat press laminating machine layer, and use a double-roller flattening machine to flatten the first printing layer on the substrate layer to obtain uncut stone-plastic panels; Step S5: After cutting the uncut stone-plastic panels to the required size, use a washing machine After trimming and trimming the periphery of the cut stone-plastic board, the stone-plastic floor can be obtained.

In step S1, the main sources of the polyethylene and the polyethylene terephthalate are clothes, trousers, shoes, hats, and various backpacks, handbags and other waste fabrics; preferably, the base Based on the weight of the material layer, the plastic alloy and the various auxiliary agents account for 35-55%; more preferably, the plastic alloy and the various auxiliary agents account for 40%. In addition, the content ratio of the polyethylene and the polyethylene terephthalate is 6:4 to 8:2; preferably, the polyethylene and the polyethylene terephthalate The content ratio is 7:3. The auxiliary agent includes compatibilizer, toughening agent, slippery agent, water absorbing agent and antioxidant.

Optionally, the stone powder is selected from calcium carbonate, clay, montmorillonite, silica or talc; preferably, the particle size of the stone powder is 300-1500 mesh; more preferably, due to cost considerations, the stone powder The particle size is 300 mesh. Preferably, based on the weight of the substrate layer, the stone powder accounts for 45-65%; more preferably, the stone powder accounts for 60%.

Optionally, the compatibilizer is selected from styrene-ethylene-butylene-styrene copolymer, styrene-butylene-styrene copolymer, EPDM rubber, polyethylene grafted maleic anhydride, poly Vinyl grafted methyl A group consisting of glycidyl acrylate, polyolefin elastomer grafted maleic anhydride or polyolefin elastomer grafted glycidyl methacrylate; preferably, based on the weight of the substrate layer, the compatibilizer Accounting for 2~6%; more preferably, the compatibilizer accounts for 4%.

Optionally, the toughening agent is selected from thermoplastic polyester elastomer or polyolefin elastomer; preferably, based on the weight of the substrate layer, the toughening agent accounts for 8-12%; more preferably, The toughening agent accounts for 10%.

Optionally, the slip agent is selected from montan wax; preferably, based on the weight of the substrate layer, the slip agent accounts for 0.3-0.7%; more preferably, the slip agent accounts for 0.5%.

Optionally, the water-absorbing agent is selected from calcium oxide powder; preferably, based on the weight of the substrate layer, the water-absorbing agent accounts for 3-7%; more preferably, the water-absorbing agent accounts for 5%.

Optionally, the antioxidant is selected from pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate (Irganox ^® 1010); preferably, based on the weight of the substrate layer, the The antioxidant accounts for 0.3-0.7%; more preferably, the antioxidant accounts for 0.5%.

In step S2, the screw length-to-diameter ratio of the twin-screw extruder is 48-56. When the screw length-to-diameter ratio is larger, it can increase the temperature division to improve the mixing of the components in the first mixture And gradually and slowly lower the temperature; preferably, under the above-mentioned screw length-to-diameter ratio, the temperature can be gradually and slowly lowered in 12 to 14 stages, and the initial feeding temperature is 270°C. Since the highest melting point of the first mixture is polyethylene terephthalate (250°C), the initial feed temperature is set slightly higher than 250°C and gradually lowered at 270°C, so that each component is completely melted Mix to improve the mixing of the ingredients.

In step S3, the co-extrusion extruder can be adjusted by the die screw at the exit to set the thickness of the base material layer and the anti-slip layer, and maintain the base material layer at 150°C after co-extrusion, In order to facilitate the subsequent lamination of the printing layer. Preferably, the thickness of the substrate layer is 4-8mm; more preferably, the thickness of the substrate layer is 4.5mm, and the thickness of the anti-slip layer is 1-5mm; more preferably, the anti-slip layer The thickness is 2mm. this In addition, in order to make the anti-slip layer have the effect of cushioning and sound insulation, the thermoplastic polyester elastomer that can be used in the anti-slip layer can further add a foaming agent to make the thermoplastic polyester elastomer slightly foamed (slightly expands in volume) ) to reduce its specific gravity; preferably, the thermoplastic polyester elastomer used in the anti-slip layer reduces the specific gravity to 0.4~0.6 after adding a foaming agent; more preferably, the thermoplastic polyester elastomer used in the anti-slip layer After adding foaming agent to the body, the specific gravity will drop to 0.4.

In step S4, the first printing layer is composed of a coating layer and a pigment layer, the coating layer faces the substrate layer, and the pigment layer is located above the coating layer.

The coating layer comprises low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer or any combination thereof; preferably, the coating layer is selected from low-density polyethylene, polyolefin elastomer, ethylene -The melting point of vinyl acetate copolymer or polymers in any combination thereof is 90~140°C, which is lower than the temperature 150°C maintained by the substrate layer after co-extrusion in step S3, so that the printed layer can be melted and bonded to the On the substrate layer; more preferably, the melting point of the low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer or any combination thereof selected for the coating layer is 90-130°C. Preferably, the thickness of the first printing layer is 30-80 μm.

Moreover, in order to block the background color of the base material layer, in step S4, a white second printing layer can be further laminated between the base material layer and the first printing layer; The composition, melting point range and thickness of the second printing layer are the same as those of the first printing layer, and will not be repeated here.

In addition, in order to make the surface of the stone-plastic floor have better wear resistance, in step S4, a wear-resistant layer can be further pasted on the first printing layer, and the wear-resistant layer is made of polyethylene terephthalate Composition, its wear resistance is twice that of general PVC wear-resistant layer, and has good optical transparency. Preferably; the melting point of polyethylene terephthalate in the wear-resistant layer is 170-180°C; preferably, the thickness of the wear-resistant layer is 200-500 μm; more preferably, the wear-resistant layer The thickness is 250 μm.

To sum up, the stone-plastic floor requested by the present invention can use various waste textile products as its materials, in order to reduce the waste caused by various textile products and the pollution to the environment; and use no toxic ingredients and The cost-reducing and environmentally friendly materials can be recycled repeatedly to reduce the amount of petrochemical materials used, damage to the environment and waste of natural resources. In addition, most of the stone-plastic floor materials requested by the present invention are polyethylene and polyethylene terephthalate. In addition to having extremely high weather resistance, because the materials can be fully recycled and directly crushed before being manufactured and utilized, There is no need to go through cumbersome component separation steps, and the manufacturing cost can be reduced.

Those in the technical field of the present invention can understand from the foregoing that the present invention can be exemplified in other specific forms without changing the technical concepts or essential features of the disclosure. In this regard, the exemplary aspects disclosed herein are for illustrative purposes only and should not be construed as limiting the scope of this disclosure. On the contrary, the present disclosure is intended to cover not only these exemplary aspects, but also various changes, modifications, equivalents, and various changes, modifications, equivalents, and other forms.

1: Stone plastic floor

2: Substrate layer

3: Anti-slip layer

4: The first printing layer

Claims (11)

A kind of stone-plastic floor, it comprises: a substrate layer, and the thickness of this substrate layer is 5～8mm; A first printing layer, is arranged on this substrate layer, and this first printing layer is made of a coating layer and a pigment Layer composition, the thickness of the coating layer is 30-80 μm, the thickness of the pigment layer is 30-50 μm; and an anti-slip layer is arranged under the substrate layer, the thickness of the anti-slip layer is 1-5 mm, wherein the substrate The layer contains plastic alloy, stone powder and multiple auxiliary agents. The plastic alloy contains polyethylene and polyethylene terephthalate, and the source of the polyethylene and polyethylene terephthalate is waste cloth. Based on the weight of the substrate layer, the plastic alloy and the plurality of auxiliary agents account for 35-55% in total, and the stone powder accounts for 45-65%; the coating layer includes low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate Copolymer or any combination thereof; the pigment layer is composed of low-melting polyethylene terephthalate; and the anti-slip layer is composed of thermoplastic polyester elastomer. The stone-plastic floor as claimed in item 1, wherein the plurality of auxiliary agents include: a compatibilizer, the compatibilizer is selected from styrene-ethylene-butylene-styrene copolymer, styrene-butylene-styrene Copolymer, EPDM rubber, polyethylene grafted maleic anhydride, polyethylene grafted glycidyl methacrylate, polyolefin elastomer grafted maleic anhydride or polyolefin elastomer grafted glycidyl methacrylate The group formed; toughening agent, the toughening agent is selected from thermoplastic polyester elastomer or polyolefin elastomer; slip agent, the slip agent is montan wax; Water-absorbing agent, the water-absorbing agent is calcium oxide powder; and antioxidant, the antioxidant is tetrakis (3,5-di-tert-butyl-4-hydroxyl) pentaerythritol phenylpropionate, wherein based on the weight of the substrate layer, the The compatibilizer accounts for 2-6%, the toughening agent accounts for 8-12%, the slip agent accounts for 0.3-0.7%, the water-absorbing agent accounts for 3-7%, and the antioxidant accounts for 0.3-0.7%. The stone-plastic floor according to claim 1, wherein the stone powder is selected from calcium carbonate, clay, montmorillonite, silica or talc, and the particle size of the stone powder is 300-1500 mesh. The stone-plastic floor according to claim 1, wherein the thermoplastic polyester elastomer used in the anti-slip layer is further added with a foaming agent to reduce its specific gravity to 0.4~0.6. The stone-plastic floor as described in claim 1, wherein a second printing layer is further included between the substrate layer and the first printing layer, and the second printing layer is also composed of a coating layer and a pigment layer, the The coating layer has a thickness of 30-80 μm, the pigment layer has a thickness of 30-50 μm, and the coating layer contains low-density polyethylene, polyolefin elastomer, ethylene-vinyl acetate copolymer or any combination thereof, and the pigment layer is composed of Composed of low melting point polyethylene terephthalate. The stone-plastic floor according to claim 5, wherein the melting point of the coating layer in the first printing layer and the second printing layer is 90-140°C. The stone-plastic floor as described in claim 1 or claim 5, wherein a wear-resistant layer is further provided above the first printing layer, the wear-resistant layer has a thickness of 200-500 μm, and the wear-resistant layer is made of polyethylene terephthalic acid Ethylene glycol composition. A method for preparing a stone-plastic floor as described in any one of claim 1 to claim 7, which includes the following steps: Step S1: adding polyethylene, polyethylene terephthalate, stone powder and a plurality of auxiliary agents Place in a high-speed mixer to mix evenly and volatilize its moisture to form a first mixture; Step S2: Placing the first mixture in a twin-screw extruder to granulate to form substrate layer pellets; Step S3: combining the substrate layer pellets with thermoplastic polyester elastomer as an anti-slip layer The material is placed in a co-extrusion extruder for co-extrusion to obtain a substrate layer and an anti-slip layer that are integrally formed; Step S4: placing a first printing layer on the substrate layer, and using a heat press laminating machine to place the first printing layer A printing layer is pasted on the substrate layer, and the first printing layer is flattened on the substrate layer using a double-roller flattening machine to obtain an uncut stone-plastic plate; step S5: the uncut After cutting the stone-plastic plate to the required size, use a ditch cleaning machine to trim the periphery of the cut stone-plastic plate, and then obtain the stone-plastic floor. The preparation method of stone-plastic flooring as described in Claim 8, wherein in step S2, the screw aspect ratio of the twin-screw extruder is 48~56, and the temperature section of the twin-screw extruder is 12~ Section 14, the initial feed temperature is 270°C. The method for preparing a stone-plastic floor according to claim 8, wherein in step S3, after co-extrusion, the substrate layer is maintained at 150°C. The preparation method of the stone-plastic floor as described in Claim 8, wherein in step S4, a second printing layer is further pasted between the substrate layer and the first printing layer and/or further on the first printing layer A wear-resistant layer is pasted on the printing layer.

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