CN109944411A - A kind of PET plastic floor and its forming method - Google Patents

Abstract

The invention discloses a PET plastic floor, which at least comprises a base material layer and a printing layer arranged on the base material layer. The base material layer is made of PET or PET mixed with PE materials or PET and PP materials. The layer is formed by spray-printing the pattern on the base material layer by means of digital spray printing, or is formed by adhering the printing layer to the upper surface of the base material layer, and the printing layer is further provided with a protective layer. The PET plastic floor does not contain halogen, and does not produce dioxins when burning, which helps to reduce air pollution; the present invention can use recycled PET or PET, and then cooperate with PE, PP and other polymer thermoplastic materials to form a substrate layer, and then According to the required characteristics, a printing layer and a wear-resistant layer are compounded on the base material layer to form an environmentally friendly and recyclable plastic floor, and the PET plastic floor can be recycled to form a renewable resource for recycling.

Description

A kind of PET plastic floor and its forming method

Technical field:

The invention relates to the field of flooring, in particular to a PET plastic floor and a molding method thereof.

Background technique:

Most of the base material of the traditional plastic bottom is made of polyvinyl chloride (PVC), which is combined with a wear-resistant layer and a printing layer to form a plastic floor. This structure has been used to this day. However, the plastic floor of this type of structure cannot be recycled and needs to be disposed of and buried at a high cost, and the dioxins produced by combustion will seriously pollute the environment.

Invention content:

The technical problem to be solved by the present invention is to provide a recyclable and recyclable environment-friendly PET plastic floor.

The technical solution of the present invention is to provide a PET plastic floor, which at least includes a base material layer and a printing layer arranged on the base material layer, and the base material layer is made of PET or a mixture of PET and PE materials or a mixture of PET and PP materials The printed layer is formed by digitally spraying the pattern on the base material layer or by attaching the printing layer to the upper surface of the base material layer. The printing layer is also provided with a protective layer, and the base material layer is a single base material. A material layer or a composite substrate layer; the substrate layer is mixed with one or a combination of wood powder, stone powder, calcium carbonate, waste spinning, PET polyester yarn, and glass fiber. One or a combination of wood powder and stone powder accounts for 5-12% of the mass of the base material layer. One or a combination of waste spinning and glass fiber accounts for 5-25% of the mass of the base material layer.

Preferably, when the printing layer is formed by digitally printing the pattern on the composite substrate layer, the protective layer is protected and embossed with a UV, TPU, PETG or PUR transparent layer; when the printing layer is affixed with a PET printing layer When formed on the upper surface of the base material layer, the protective layer is a transparent protective layer of TPU, PETG, PUR or PET, and the protective layer is attached to the upper surface of the printing layer.

Preferably, a flame retardant impregnated paper layer impregnated with aluminum oxide is also attached to the printed layer.

As a preference, the PET material is selected from PET recycled material. Combining recycled PET with PET, PE, PP and EVA into a composite floor, making PET material as a filler for plastic floors, preferably recycling PET materials to increase the thickness of plastic floors, recycling PET, and reducing environmental pollution.

The invention also provides a molding method of PET plastic floor. After granulation by a granulator, an extruder is used to extrude a substrate layer sheet, and then the PET printing layer and the protective layer are placed on the substrate layer in sequence, and a press is used to extrude the substrate layer. Hot pressing to form plastic floor. The composite substrate layer is bonded and cut into sheets by co-extrusion, and then the printing layer and the wear-resistant layer are placed on the composite substrate layer in sequence, and then the plastic floor is formed by hot pressing with a press.

Alternatively, use one-step extrusion molding, enter into the extruder after granulation, and after extruding the substrate layer, attach the printing layer and the protective layer on the line, or use two extruders arranged in sequence before and after, the front After the extruder pulverizes the material, it directly enters the subsequent extruder to extrude the base material layer.

Preferably, the base material layer is extruded and formed by one-step method, followed by laminating the color film and the wear-resistant layer, and embossing.

The invention also provides a molding method for PET plastic floor. The raw materials are mixed in an internal mixer and then enter an extruder and a calender in turn, and are rolled and bonded with a printing layer and a protective layer on the calender to form a plastic floor. The calender is three Roller or more than three-roller mechanism.

Preferably, the printing layer is made of PET white blank, which is compounded with the transparent film and embossed and bonded to the base material layer by hot pressing or cold bonding with an adhesive, or the printing layer is made of PET cloth and hot-pressed with an adhesive. Or cold paste it on the base material layer, and then print the pattern on the printing layer by digital printing to form the pattern and texture of the opposite flower or the opposite flower.

Preferably, the composite substrate layer is foamed by adding a gas to produce a foam or using a blowing agent to foam the composite substrate layer to form a foam.

The present invention also provides a method for forming a PET plastic floor. The raw material is extruded by an extruder and then enters a heating steel belt of a press forming mechanism, and the extruded base material layer is preheated by the heating steel belt, and the preheated The base material layer is laminated with the printing layer and the protective layer with a pressurized steel belt; or the raw materials are directly sprinkled on the bottom pressurized steel belt after being mixed, and the base material layer is formed by pressing the upper and lower pressurized steel belts, and then mixed with the bottom pressurized steel belt. The printing layer and the protective layer are laminated.

Preferably, the printing layer and the wear-resistant layer are transported by the rolling equipment, so that the printing layer is arranged on the base material layer, and the protective layer is arranged on the printing layer. The closed pressurized steel belt rolling on a plurality of rollers makes the substrate layer conveyed by the conveying mechanism move with the pressurized steel belt on the pressurized steel belt, so that when the superimposed substrate layer, printing layer and resistant When the grinding layer passes through, the contact position of the pressurized steel belt and the roller is press-fitted, and the pressurized steel belt is also provided with embossing, so as to emboss the plastic floor.

Compared with the prior art after the above scheme is adopted, the present invention has the following advantages: the selected raw materials are all recyclable polyolefin elastomers, the produced plastic floor does not contain halogen, does not produce dioxins during combustion, and has Helps to reduce air pollution; the present invention can also use recycled PET or PET, and then cooperate with PE, PP, TPU, EVA and other polymer thermoplastic materials to form a substrate layer, and then according to the required characteristics, composite printing layers on the substrate layer At the same time, due to the addition of glass fiber and waste spinning to the base material layer, an environmentally friendly and recyclable plastic floor is formed, and the plastic floor can be recycled to form renewable resources for recycling.

Description of drawings:

FIG. 1 is a schematic structural diagram of a single substrate layer plastic floor of the present invention.

FIG. 2 is a schematic structural diagram of the double-layer composite substrate layer plastic floor of the present invention.

Detailed ways:

The present invention will be further described below with respect to specific embodiments:

Example 1

A PET plastic floor, as shown in Figure 1, includes a base material layer 1 and a printing layer 2 arranged on the base material layer. The base material layer 2 is made of PET recycled material, and the printing layer 2 is a PET printing layer. It is formed by being attached to the upper surface of the base material layer. The printing layer 2 is also provided with a protective layer 3. The protective layer 3 is a PTU transparent protective layer or a PET transparent protective layer. The protective layer 3 is attached to the upper surface of the PET printing layer. Among them, in order to improve the performance, improve the hardness and rigidity of the composite substrate layer, reduce the shrinkage rate, linear expansion coefficient and creep performance of plastic products, make it easy to process, and improve the heat resistance of the plastic floor, the substrate layer is also mixed. There are wood powder and stone powder, and the mass percentage of wood powder and stone powder in the base material layer is 7%. In addition, it also contains 15% glass fiber, and the glass fiber can be long fiber or short fiber. Alternatively, crushed spinning waste can also be incorporated, and the total amount of spinning waste and glass fiber does not exceed 25%. The waste spinning is preferably polyester waste.

Further, in order to achieve the purpose of flame retardancy, a flame retardant impregnated paper layer impregnated with Al2O3 is also attached to the printed layer, and the impregnated paper layer can be provided on the protective layer or between the printed layer and the protective layer. The bonding method is adhesive bonding.

During preparation, after granulation by a granulator, the substrate layer sheet is extruded by an extruder, and then the PET printing layer and the protective layer are placed on the substrate layer in sequence, and the plastic floor is formed by hot pressing with a press.

Alternatively, the base material layer is extruded by one-step method, and the base material layer is extruded by one-step method, using two extruders arranged in sequence, the former extruder crushes the material and directly enters the latter extruder to extrude. Then, the printing layer and the wear-resistant layer are sequentially placed on the composite substrate layer, and finally the plastic floor is formed by hot pressing with a press. It is produced by direct lamination by extruder, and the base material is extruded by the extruder, which can be single-layer or multi-layer. The upper layer is directly laminated with the printing layer and the protective layer. Can be 3-roll, 4-roll, or multi-roll lamination. Alternatively, the base material layer is extruded and formed by a one-step method, and then the color film and the wear-resistant layer are laminated, and embossed. The embossing can be the same as the color film texture to form a plastic floor with or without embossing. The wear-resistant layer is in this embodiment. The middle is the protective layer. In fact, the protective layers all have the function of wear-resistant layers.

In addition, it can also be prepared in the following way. The raw materials are mixed in an internal mixer and then enter the extruder and the calender in turn. On the calender, the printing layer and the protective layer are rolled and bonded to form a plastic floor. The calender is a three-roller or three-roller. above institutions.

In addition, the printing layer is made of PET blank, compounded with the transparent film and embossed and pasted, and then bonded to the base material layer by hot pressing or cold bonding with an adhesive, or the printing layer is made of PET cloth by hot pressing or The cold paste is bonded to the substrate layer, and then the pattern is printed on the printing layer by digital printing to form the pattern and texture of the opposite flower or the opposite flower.

Even, in the present invention, the raw material can be extruded through the extruder and then entered into the heating steel belt of the pressure forming mechanism, the heating steel belt is heated by the heating mechanism, and the extruded base material layer is preheated by the heating steel belt, so that the The preheated base material layer is bonded to the printing layer and the protective layer by a pressurized steel belt. Preferably, the printing layer and the wear-resistant layer are transported by the rolling equipment, so that the printing layer is arranged on the base material layer, and the protective layer is arranged on the printing layer. The closed pressurized steel belt rolling on a plurality of rollers makes the substrate layer conveyed by the conveying mechanism move with the pressurized steel belt on the pressurized steel belt, so that when the superimposed substrate layer, printing layer and resistant When the abrasive layer passes through, the contact position of the pressurized steel belt and the roller is press-fitted. Or, more simply, after the raw materials are mixed, they are directly sprinkled on the lower pressing steel belt, and the base material layer is formed by pressing the upper and lower pressing steel belts, and then is laminated with the printing layer and the protective layer.

Further, in order to meet the needs of embossing, the pressing steel belt is also provided with embossing, so as to emboss the plastic floor.

This product can be made into different thickness products according to different production processes.

Example 2

A PET plastic floor, which comprises a base material layer and a printing layer arranged on the base material layer, the base material layer is made by mixing PET and PP materials, and the printing layer prints a pattern on the base material by means of digital spray printing The printing layer is also provided with a protective layer, and the protective layer is protected and embossed by UV, TPU or PUR. Among them, in order to improve the performance, improve the hardness and rigidity of the composite substrate layer, reduce the shrinkage rate, linear expansion coefficient and creep performance of plastic products, make it easy to process, and improve the heat resistance of the plastic floor, the substrate layer is also mixed. There are wood powder and stone powder, and the mass percentage of wood powder and stone powder in the base material layer is 8%. In addition, it also contains 10% glass fiber, 9% waste spinning and 2% PET polyester yarn. The waste spinning is preferably polyester waste spinning. The glass fiber can be long fiber or short fiber.

Example 3

A PET plastic floor, as shown in Figure 2, includes a base material layer 1 and a printing layer 2 arranged on the base material layer, the base material layer 1 is a double-layer composite base material layer, and the composite base material layer includes a To the first base material layer 11 and the second base material layer 12 arranged below, the first base material layer 11 is made by mixing PET and PE materials, and the second base material layer 12 is made by mixing PET and PE materials. The printing layer 2 is formed by adhering the PET printing layer to the upper surface of the base material layer. The printing layer 2 is also provided with a protective layer 3. The protective layer 3 is a PET transparent protective layer, and the protective layer 3 is attached to the upper surface of the PET printing layer. Among them, in order to improve the performance, improve the hardness and rigidity of the composite substrate layer, reduce the shrinkage rate, linear expansion coefficient and creep performance of plastic products, and facilitate processing, and improve the heat resistance of the plastic floor, in the first substrate layer Filling materials such as 6% wood powder and calcium carbonate can also be added, and 5% stone powder and 7% short glass fiber can also be added to the second substrate layer, and the foam is formed by physical foaming or chemical foaming. Specifically, physical foaming can add gas to produce a foam, and chemical foaming uses a foaming agent to foam the composite substrate layer to form a foam, so that the composite substrate layer has a degree of expansion and is lightweight.

The composite substrate layer is bonded and cut into sheets by co-extrusion, and then the printing layer and the wear-resistant layer are placed on the composite substrate layer in sequence, and then the plastic floor is formed by hot pressing with a press.

In addition, PET can be recycled and reused.

In order to enhance its uniqueness and wear resistance, when the composite substrate layer is formed, the printing layer and the wear-resistant layer can be rolled together to form the final plastic floor. Among them, the printing layer can be digitally spray-printed on the composite substrate layer or the printing layer is a PET printing layer, and the PET printing layer is attached to the upper surface of the composite substrate layer and overlaps with the composite substrate layer; the protective layer is PTU transparent protection layer or PET transparent protective layer, the protective layer is attached to the upper surface of the PET printing layer. In the specific operation process, when the composite substrate layer is co-extruded online, the PET printing layer can be pasted on the composite substrate layer, and the upper and lower layers are overlapped and bonded together; and the printing layer can be formed on the composite substrate. The upper edge of the layer is printed with preset patterns or lines on its surface, and the wear-resistant layer is formed on the printed layer. After the composite substrate layer is co-extruded, the printed layer and the wear-resistant layer are respectively transported to a rolling unit by means of rolling equipment, and the composite substrate layer, the printed layer and the wear-resistant layer are rolled and bonded by the rolling unit. Fixed as a whole, becoming an environmentally friendly plastic floor. Its forming method is very efficient and environmentally friendly, and the rolling unit can be combined in one or more groups.

Regarding the combination of the printing layer, the PET transparent layer is used for back printing, and then the polymer is used to coat the back side to make it have better viscosity, and the printing layer can also be TPU, EVA, PUR, PE and other plastics with high resistance Grind the material so that it can be connected to each other. Or after the printing layer is formed, the pattern will be printed on the printing layer by digital printing, and then protected and embossed with UV, TPU, PETG or PUR. Alternatively, the printing layer is formed by digitally printing the pattern on the composite substrate layer, and then protecting and embossing with UV, TPU, PETG or PUR.

The PET in the above embodiments can all be recycled materials.

The plastic floor made by the present invention has the following advantages:

First of all, recycled PET can be used as a remanufactured raw material, which not only recycles resources, but also has a low cost. The finished products produced by it do not contain dioxins, which effectively reduces the damage to the environment. Secondly, the present invention uses recycled PET as the base material of the plastic floor, and mixes it with PP, PE, PET to form the base material layer, does not use PVC at all, and is relatively more environmentally friendly. In addition, the printing layer and the wear-resistant layer of the present invention can adjust the formula, that is, the proportion according to the needs of the user, not only can have patterns and patterns, but also have UV resistance, wear resistance, scratch resistance, durability, shock absorption, heat resistance and long service life Etc.

To sum up, the present invention can recycle a large amount of PET, and cooperate with adding PP and PE to support the base material layer at the bottom of the plastic. Environmentally friendly plastic flooring, in particular, overcomes the problem of adhesion of different materials, so that PET, PP and PE are closely attached to the composite substrate layer, which can solve a large number of secondary PET in the environment. In addition, by using stone powder, wood powder, glass While improving the performance of fiber and waste spinning, it can meet the needs of environmental protection and increase the application value of the industry.

The above only describes the preferred embodiments of the present invention, but should not be construed as limiting the claims. All equivalent structures or equivalent process transformations made by using the description of the present invention are included within the scope of patent protection of the present invention.

Claims (10)

1. a PET plastic floor, it comprises at least a base material layer and the printing layer that is arranged on the base material layer, it is characterized in that: the base material layer is made by mixing PET or PET and PE material or PET and PP material mixing and making , the printing layer is formed by digitally printing the pattern on the base material layer, or the printing layer is formed by adhering to the upper surface of the base material layer, the printing layer is also provided with a protective layer, and the base material layer is a single base material layer or Composite base material layer; the base material layer is mixed with one or a combination of several of wood powder, stone powder, calcium carbonate, waste spinning, PET polyester yarn and glass fiber. 2. The PET plastic floor according to claim 1 is characterized in that: when the printing layer is formed by digitally printing the pattern on the composite substrate layer, the protective layer is formed by UV, TPU, PETG or PUR transparent layer. Do protection and embossing; when the printing layer is formed by laminating the PET printing layer on the upper surface of the substrate layer, the protective layer is a transparent protective layer of TPU, PETG, PUR or PET, and the protective layer is attached to the upper surface of the printing layer. 3 . The PET plastic floor according to claim 1 , wherein the printed layer is further adhered with a flame retardant impregnated paper layer impregnated with Al2O3. 4 . 4. A method for forming a PET plastic floor, characterized in that: after granulation, an extruder is used to extrude a base material layer plate, and then the PET printing layer and the protective layer are placed on the base material layer in sequence, and a press is used to heat the floor. Press to form a plastic floor; wherein, when the substrate layer is a composite substrate layer, the substrate layer is co-extruded to form a multi-layer co-extruded substrate, which is bonded and cut into sheets by co-extrusion, and then the printing layer and the wear-resistant layer are formed. It is placed on the substrate layer in sequence, and then hot-pressed by a press to form a plastic floor. 5. The molding method of PET plastic floor according to claim 4, it is characterized in that: adopt one-step extrusion molding, enter into extruder after granulation, after extruding base material layer, fit printing layer and protection on line layer, or using two extruders arranged in sequence, the former extruder crushes the material and directly enters the latter extruder to extrude the base material layer. 6. The method for forming a PET plastic floor according to claim 5, wherein the base material layer is extruded and formed by a one-step method, followed by laminating the color film and the wear-resistant layer, and embossing, and the embossing can be combined with the color film. The same texture forms a pair of flowers or a different type of plastic floor. 7. A method for forming a PET plastic floor, characterized in that: the raw materials enter an extruder and a calender in turn after being kneaded by an internal mixer, and are rolled and bonded to a printing layer and a protective layer on the calender to form a plastic floor, and the calender It is a three-roller or more than three-roller mechanism. 8. The molding method of PET plastic floor according to claim 1, it is characterized in that: the printing layer is made of PET blank, and after compounding with transparent film and laminating by embossing, the adhesive is hot-pressed or cold-pasted on the PET floor. On the substrate layer, or the printing layer is bonded to the substrate layer by hot pressing or cold bonding with PET cloth, and then the pattern is spray-printed on the printing layer by digital printing to form a pattern of opposite flowers or different flowers. texture. 9. A method for forming a PET plastic floor, characterized in that: the raw material is extruded by an extruder and then enters a heating steel belt of a pressure forming mechanism, and the extruded base material layer is preheated by the heating steel belt, The heated base material layer is laminated with the printing layer and the protective layer with a pressurized steel belt; or the raw materials are directly sprinkled on the lower pressurized steel belt after being mixed, and the base material layer is formed by pressing the upper and lower pressurized steel belts. Laminate with printed layer and protective layer. 10. The molding method of PET plastic floor according to claim 9, characterized in that: the printing layer and the wear-resistant layer are conveyed by the rolling equipment, so that the printing layer is arranged on the base material layer, and the protective layer is arranged on the printing layer , the pressure forming mechanism makes the substrate layer conveyed by the conveying mechanism follow the pressure steel belt on the pressure steel belt through a plurality of rollers with the same rotational speed and a closed pressure steel belt rolled on the plurality of roller wheels. The belt moves so that when the upper and lower substrate layers, the printing layer and the wear-resistant layer pass through, the pressure steel belt and the roller are pressed together at the contact position, and the pressure steel belt is also provided with embossing for Plastic floor pressing texture.