Lightweight flame-retardant PETG plate and preparation method thereof

Abstract

The invention relates to a light flame-retardant PETG plate and a preparation method thereof, and belongs to the technical field of building materials. The board comprises a board body, and a mute layer, a PETG base material layer, a decoration layer, a wear-resistant layer and a UV paint layer are sequentially arranged on the board body in a stacked mode. A plate lock and a plate buckle are respectively arranged at two ends of the plate main body, so that one plate main body floor buckle can be matched with the adjacent plate main body floor lock to realize the installation of the light flame-retardant PETG plate; the thickness of the light flame-retardant PETG plate ranges from 3 mm to 8 mm. The PETG base material not only has good endurance capacity, but also has strong impact resistance and is not easy to damage, the phenomenon that the floor is arched or trips under the condition that the floor is overheated during installation or the floor is cooled can be avoided, and the PETG material is light in specific gravity, high in strength and good in folding resistance compared with a PVC (polyvinyl chloride) material. The PETG base material is good in flame retardant property, and the flame retardant level B1 is reached.

Description

Technical Field

[0001] The present application relates to the technical field of building materials, and in particular to a lightweight flame-retardant PETG sheet and a preparation method thereof. Background Art

[0002] Flooring is a commonly used decorative material, widely used in various places. However, with the improvement of people's living standards, more and more requirements are placed on flooring, and different functions are needed for different scenes. Traditional plastic composite flooring is mostly based on PVC. The existing PVC flooring is relatively mature, with excellent performance and good decorative effect. However, the dimensional stability of PVC flooring is poor, and the flooring material is difficult to degrade. In addition, the softening point of the PVC baseboard is low. When constructed over a large area, it is easy to lift up due to heat or trip due to cold. The surface hardness of PVC flooring is low and it is easy to scratch, which affects the appearance of the flooring and shortens the life of the flooring. Summary of the invention

[0003] The purpose of this application is to provide a lightweight flame-retardant PETG sheet and a preparation method thereof, which not only has good tolerance but also strong impact resistance and is not easy to be damaged, and can avoid the phenomenon of overheating during installation causing the floor to bulge or tripping under cold conditions. In addition, compared with PVC materials, PETG materials have a light specific gravity, high strength, and good folding resistance. PETG substrate has good flame retardant properties, reaching the flame retardant B1 level.

[0004] In the first aspect, the present application provides a lightweight flame-retardant PETG board, comprising a board main body, wherein the board main body comprises a sound-proof layer, a PETG substrate layer, a decorative layer, a wear-resistant layer and a UV paint layer stacked in sequence; board locks and board buckles are respectively provided at both ends of the board main body, so that one board main body floor buckle can cooperate with an adjacent board main body floor lock to achieve the installation of the lightweight flame-retardant PETG board; the thickness of the lightweight flame-retardant PETG board is 3-8 mm.

[0005] In some embodiments, the lightweight flame-retardant PETG sheet has a first surface and a second surface opposite to each other, and the board lock includes a first locking member and a second locking member, wherein the first locking member is flush with the first surface and extends outward, and the second locking member is flush with the second surface and extends outward, and in the extension direction, the width of the second locking member is greater than the width of the first locking member, and a locking groove is provided between the first locking member and the second locking member;

[0006] The plate buckle comprises a first buckle and a buckle tongue connected to the first buckle, wherein the first buckle is flush with the first surface and extends outward;

[0007] When one of the plate body floor buckles is matched with the adjacent plate body floor lock, the buckle tongue is in the lock groove, and the surface of the first buckle is flush with the surface of the first lock.

[0008] In some embodiments, a first notch and a second notch are provided on a side of the second locking element close to the first locking element, a first protrusion is provided on a side of the first locking element close to the second surface, and a second protrusion is provided on a side of the buckle tongue close to the second surface;

[0009] When one of the plate body floor buckles cooperates with the adjacent plate body floor lock, the second protrusion is located in the second notch, and the first protrusion is located in the first notch.

[0010] In some embodiments, the depth of the first notch is greater than the depth of the second notch.

[0011] In some embodiments, main materials of the wear-resistant layer include transparent polyvinyl chloride resin and wear-resistant particles.

[0012] In some embodiments, main materials of the PETG substrate layer include PETG and calcium carbonate powder.

[0013] In some embodiments, the formula ingredients of the PETG substrate layer are PETG, anti-UV agent, antioxidant, calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate, and ammonium octamolybdate;

[0014] Among them, the formula ratio is 80-100 parts of PETG, 0.2-0.6 parts of anti-UV agent, 0.5-1.5 parts of antioxidant, 200-350 parts of calcium carbonate powder, 20-40 parts of magnesium hydroxide, 20-40 parts of aluminum hydroxide, 10-20 parts of zinc borate, and 1-5 parts of ammonium octamolybdate, calculated by weight.

[0015] In some embodiments, the main material of the noise-reducing layer includes IXPE and EVA.

[0016] In a second aspect, the present application provides a method for preparing a lightweight flame-retardant PETG sheet, comprising:

[0017] Step 1: Mix PETG, anti-UV agent, antioxidant, calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate and ammonium octamolybdate in proportion, then stir and mix evenly and dry to obtain a raw material;

[0018] Step 2: putting the raw material into a double-screw extruder for heating and then continuously extruding and molding, and the formed sheet is subjected to a thickness determination process by a four-roll calender to obtain the PETG substrate layer;

[0019] Step 3: stacking the extruded PETG substrate, the decorative layer and the wear-resistant layer together, rolling them through rollers at 160-190° C. and under a certain pressure, then cooling and cutting;

[0020] Step 4: The cut sheets are subjected to UV paint treatment, cold-sticking of a sound-proof film, grooving, and chamfering treatment to obtain the lightweight flame-retardant PETG sheet.

[0021] In some embodiments, in step 1, drying is performed in a hot air circulation dryer with a set temperature of 65-70° C. for 4-6 hours;

[0022] In the step 2, there are 6 temperature zones for continuous extrusion molding, wherein zone 1 is 220-260°C, zone 2 is 220-260°C, zone 3 is 210-250°C, zone 4 is 180-220°C, zone 5 is 160-200°C, and zone 6 is 160-200°C.

[0023] The beneficial effects of the lightweight flame-retardant PETG sheet and the preparation method thereof provided in the present application include:

[0024] (1) PETG substrate not only has good tolerance but also strong impact resistance and is not easy to be damaged. It can prevent the floor from overheating during installation, causing the floor to bulge or tripping when it is cold. In addition, compared with PVC material, PETG material has a lighter specific gravity, higher strength and better folding resistance. PETG substrate has good flame retardant properties, reaching the flame retardant B1 level.

[0025] (2) During installation, one of the board body floor buckles can be directly matched with the adjacent board body floor lock, which can make installation more convenient and cooperate with the PETG substrate layer, making it less likely to deform and disengage.

[0026] (3) A decorative layer, a wear-resistant layer and a UV paint layer are arranged on the PETG substrate layer to make it more beautiful and wear-resistant. A silent layer is arranged on the other side of the PETG substrate layer so that when stepped on, the sound is small and no noise is caused. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the layer structure of the lightweight flame-retardant PETG board provided in an embodiment of the present application.

[0029] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0030] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0031] Icons: 10-board body; 11-soundproof layer; 12-PETG substrate layer; 13-decorative layer; 14-wear-resistant layer; 15-UV paint layer; 21-board lock; 22-board buckle; 16-first surface; 17-second surface; 211-first locking piece; 212-second locking piece; 213-locking groove; 221-first buckle; 222-buckle tongue; 214-first notch; 215-second notch; 223-first protrusion; 224-second protrusion. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present application.

[0033] Figure 1 This is a schematic diagram of the layer structure of the lightweight flame-retardant PETG sheet provided in the embodiment of this application. Figure 1 The lightweight flame-retardant PETG sheet includes a sheet body, which includes a sound-proof layer, a PETG substrate layer, a decorative layer, a wear-resistant layer and a UV paint layer stacked in sequence; both ends of the sheet body are provided with sheet locks and sheet buckles, respectively, so that one sheet body floor buckle can cooperate with an adjacent sheet body floor lock to achieve the installation of the lightweight flame-retardant PETG sheet; the thickness of the lightweight flame-retardant PETG sheet is 3-8 mm.

[0034] The board uses a PETG substrate layer as the main body. PETG has a fast curing time and excellent transparent material characteristics in processing and molding. The PETG substrate not only has good tolerance but also has strong impact resistance and is not easy to be damaged. It can avoid the floor from being overheated during installation, causing the floor to bulge or be disengaged when it is cold. In addition, the PETG material has a light specific gravity, high strength and good folding resistance compared to PVC materials. The PETG substrate has good flame retardant properties and reaches the flame retardant B1 level. A decorative layer, a wear-resistant layer and a UV paint layer are arranged on the PETG substrate layer to make it more beautiful and wear-resistant. A silent layer is arranged on the other side of the PETG substrate layer, and the sound is small when stepped on, and no noise is caused. During installation, directly making one of the board body floor buckles cooperate with the adjacent board body floor lock can make the installation more convenient, and cooperate with the PETG substrate layer, so that it is not easy to deform and disengage.

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle. Figure 3 for Figure 1 Magnified view of point B in the figure. Figure 1-Figure 3 The lightweight flame-retardant PETG sheet has a first surface and a second surface relative to each other, the board lock includes a first locking piece and a second locking piece, the first locking piece is flush with the first surface and extends outward, the second locking piece is flush with the second surface and extends outward, in the extension direction, the width of the second locking piece is greater than the width of the first locking piece, and a locking groove is provided between the first locking piece and the second locking piece; the board buckle includes a first fastener and a buckle tongue connected to the first fastener, the first fastener is flush with the first surface and extends outward; when one of the board body floor buckles cooperates with the adjacent board body floor lock, the buckle tongue is in the locking groove, and the surface of the first fastener is flush with the surface of the first locking piece.

[0036] In the above technical solution, when installing the plate, the buckle tongue is first placed on the portion of the second locking element that leaks out of the first locking element, and then pushed inward into the locking groove to achieve the installation of the plate, which is more convenient and stable.

[0037] In some embodiments, a first notch and a second notch are provided on a side of the second locking element close to the first locking element, a first protrusion is provided on a side of the first locking element close to the second surface, and a second protrusion is provided on a side of the buckle tongue close to the second surface; when one of the plate body floor buckles is matched with an adjacent plate body floor lock, the second protrusion is located in the second notch, and the first protrusion is located in the first notch.

[0038] In the above technical solution, the second locking piece has two notches, which cooperate with the two protrusions on the plate buckle, and can be clipped together when installing the plate, which can make the installation of the plate more stable and avoid the plate from lifting or disengaging.

[0039] In some embodiments, the depth of the first notch is greater than the depth of the second notch.

[0040] In the above technical solution, the depth of the inner notch is smaller, and the depth of the outer notch is larger, which can make the installation more stable and less likely to fall off.

[0041] In some embodiments, the main materials of the PETG substrate layer include PETG and calcium carbonate powder. This material can further improve the tolerance and impact resistance of the PETG substrate, and the stability of the plate is also better, the strength is higher, and the folding resistance is better.

[0042] In some embodiments, the formula ingredients of the PETG substrate layer are PETG, anti-UV agent, antioxidant, calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate, and ammonium octamolybdate;

[0043] Among them, the formula ratio is 80-100 parts of PETG, 0.2-0.6 parts of anti-UV agent, 0.5-1.5 parts of antioxidant, 200-350 parts of calcium carbonate powder, 20-40 parts of magnesium hydroxide, 20-40 parts of aluminum hydroxide, 10-20 parts of zinc borate, and 1-5 parts of ammonium octamolybdate, calculated by weight.

[0044] Further, the anti-UV agent includes at least one of the anti-UV agent 531, the anti-UV agent 234, and the anti-UV agent 5411. The antioxidant includes at least one of BHA, BHT, PG, tea polyphenols, and phytic acid.

[0045] Optionally, the thickness of the PETG substrate layer is 3 to 8 mm.

[0046] Optionally, the thickness of the decorative layer is 0.06-0.08 mm.

[0047] In some embodiments, the main material of the wear-resistant layer includes transparent polyvinyl chloride resin and wear-resistant particles, which can achieve wear resistance and transparency, and can allow the decorative layer to leak out, making the board more beautiful.

[0048] Optionally, the wear-resistant layer has a thickness of 0.15 to 0.75 mm.

[0049] Optionally, the thickness of the UV paint layer is 0.03-0.08 mm.

[0050] In some embodiments, the main material of the noise-reducing layer includes IXPE and EVA.

[0051] Optionally, the thickness of the sound-proof layer is 0.8-2.0 mm.

[0052] In a second aspect, the present application provides a method for preparing a lightweight flame-retardant PETG sheet, comprising:

[0053] Step 1: Mix PETG, anti-UV agent, antioxidant, calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate and ammonium octamolybdate in proportion, then stir and mix evenly and dry to obtain a raw material;

[0054] Step 2: putting the raw material into a double-screw extruder for heating and then continuously extruding and molding, and the formed sheet is subjected to a thickness determination process by a four-roll calender to obtain the PETG substrate layer;

[0055] Step 3: stacking the extruded PETG substrate, the decorative layer and the wear-resistant layer together, rolling them through rollers at 160-190° C. and under a certain pressure, then cooling and cutting;

[0056] Step 4: The cut sheets are subjected to UV paint treatment, cold-sticking of a sound-proof film, grooving, and chamfering treatment to obtain the lightweight flame-retardant PETG sheet.

[0057] In the above technical solution, the raw material of the PETG substrate is continuously extruded to further improve the performance of the PETG substrate layer, thereby making the performance of the board more excellent.

[0058] Specifically, the preparation method comprises:

[0059] S110: 80-100 parts by weight of PETG, 0.2-0.6 parts by weight of anti-UV agent, 0.5-1.5 parts by weight of antioxidant, 200-350 parts by weight of calcium carbonate powder, 20-40 parts by weight of magnesium hydroxide, 20-40 parts by weight of aluminum hydroxide, 10-20 parts by weight of zinc borate, and 1-5 parts by weight of ammonium octamolybdate are mixed in proportion, added into a high-speed stirring barrel and mixed evenly, and then placed in a hot air circulation dryer, set the temperature to 65-70° C., and the drying time is 4-6 hours, to finally obtain a mixed raw material.

[0060] S120 puts the raw material into a twin-screw extruder for heating and then continuously extrudes and forms, and the formed sheet is subjected to a thickness setting process by a four-roll calender to obtain the PETG substrate layer. There are 6 temperature zones for continuous extrusion molding, wherein zone one is 220-260°C, zone two is 220-260°C, zone three is 210-250°C, zone four is 180-220°C, zone five is 160-200°C, and zone six is ​​160-200°C.

[0061] S130 stacks the extruded PETG substrate, the decorative layer (eg, color film), and the wear-resistant layer together, and calenders them at 160-190° C. and 0.5-2.0 MPa through rollers, then cools them down and cuts them.

[0062] S140 processes the cut sheets with UV paint, applies a cold soundproof film, performs grooving and chamfering to obtain the lightweight flame-retardant PETG sheet, and then packages the sheet.

[0063] The present application is further described below with reference to examples, which are intended only to illustrate the present application, but not to limit the present application.

[0064] Example

[0065] A method for preparing a lightweight flame-retardant PETG sheet comprises:

[0066] (1) PETG, anti-UV agent 234, antioxidant (BHA), calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate, and ammonium octamolybdate are mixed in proportion, added into a high-speed stirring barrel and mixed evenly, and then placed in a hot air circulation dryer, set the temperature to 70° C., and the time is 5 hours to finally obtain a mixed raw material.

[0067] (2) The raw material of step (1) is placed in a twin-screw extruder for heating and then continuously extruded and molded, and the molded sheet is subjected to a thickness setting treatment by a four-roll calender to obtain a PETG substrate layer. The continuous extrusion molding has a total of 6 temperature zones, wherein the first zone is 240°C, the second zone is 240°C, the third zone is 230°C, the fourth zone is 200°C, the fifth zone is 180°C, and the sixth zone is 180°C.

[0068] (3) The PETG substrate layer extruded in step (2) is stacked together with the color film and the wear-resistant layer, and is calendered by rollers at 180° C. and a certain pressure, and then cooled and cut.

[0069] (4) The cut sheets are treated with UV paint, cold-laminated with a sound-proof film, slotted, and chamfered to obtain a lightweight flame-retardant PETG sheet, which is then packaged.

[0070] Among them, the specific material of the PETG substrate layer is shown in Table 1:

[0071] Table 1 Specific materials of PETG substrate layer

[0072] Element Example 1 Example 2 Example 3 PETG 85 copies 90 servings 95 copies Anti-UV agent 0.4 parts 0.4 parts 0.4 parts Antioxidants 1.2 servings 1.2 servings 1.2 servings Calcium carbonate powder 330 copies 300 copies 280 copies Magnesium hydroxide 30 servings 35 servings 35 servings Aluminum hydroxide 30 servings 35 servings 35 servings Zinc borate 15 servings 15 servings 15 servings Ammonium octamolybdate 3 servings 3 servings 3 servings

[0073] Experimental example

[0074] The properties of the lightweight flame-retardant PETG sheets provided in Examples 1 to 3 and the sheets provided in Comparative Example 1 are respectively tested as shown in Table 2 (wherein, Comparative Example 1 in Table 2 is a conventional PVC sheet, other materials are selected the same, the substrate layer is selected differently, and the thickness of each layer is the same):

[0075] Table 2 Properties of the board

[0076]

[0077]

[0078] It can be seen from Table 2 that the lightweight flame-retardant PETG sheet provided in the embodiment of the present application is lighter, has higher strength, better locking ability, better high-temperature stability, and is not easy to fall off.

[0079] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A lightweight flame-retardant PETG sheet, characterized in that: It comprises a board body, which comprises a sound-proof layer, a PETG substrate layer, a decorative layer, a wear-resistant layer and a UV paint layer stacked in sequence; board locks and board buckles are respectively arranged at both ends of the board body, so that a floor buckle of the board body can cooperate with an adjacent floor lock of the board body to realize the installation of the lightweight flame-retardant PETG board; the thickness of the lightweight flame-retardant PETG board is 3-8mm.

2. The lightweight flame-retardant PETG sheet according to claim 1, characterized in that: The lightweight flame-retardant PETG sheet has a first surface and a second surface opposite to each other, and the board lock includes a first locking member and a second locking member, the first locking member is flush with the first surface and extends outward, the second locking member is flush with the second surface and extends outward, in the extension direction, the width of the second locking member is greater than the width of the first locking member, and a locking groove is provided between the first locking member and the second locking member; The plate buckle comprises a first buckle and a buckle tongue connected to the first buckle, wherein the first buckle is flush with the first surface and extends outward; When one of the plate body floor buckles is matched with the adjacent plate body floor lock, the buckle tongue is in the lock groove, and the surface of the first buckle is flush with the surface of the first lock.

3. The lightweight flame-retardant PETG sheet according to claim 2, characterized in that: A first notch and a second notch are provided on a side of the second locking element close to the first locking element, a first protrusion is provided on a side of the first locking element close to the second surface, and a second protrusion is provided on a side of the buckle tongue close to the second surface; When one of the plate body floor buckles cooperates with the adjacent plate body floor lock, the second protrusion is located in the second notch, and the first protrusion is located in the first notch.

4. The lightweight flame-retardant PETG sheet according to claim 3, characterized in that: The depth of the first notch is greater than the depth of the second notch.

5. The lightweight flame-retardant PETG sheet according to any one of claims 1 to 4, characterized in that: The main materials of the wear-resistant layer include transparent polyvinyl chloride resin and wear-resistant particles.

6. The lightweight flame-retardant PETG sheet according to any one of claims 1 to 4, characterized in that: The main materials of the PETG substrate layer include PETG and calcium carbonate powder.

7. The lightweight flame-retardant PETG sheet according to claim 6, characterized in that: The formula ingredients of the PETG substrate layer are PETG, anti-UV agent, antioxidant, calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate, and ammonium octamolybdate; Among them, the formula ratio is 80-100 parts of PETG, 0.2-0.6 parts of anti-UV agent, 0.5-1.5 parts of antioxidant, 200-350 parts of calcium carbonate powder, 20-40 parts of magnesium hydroxide, 20-40 parts of aluminum hydroxide, 10-20 parts of zinc borate, and 1-5 parts of ammonium octamolybdate, calculated by weight.

8. The lightweight flame-retardant PETG sheet according to any one of claims 1 to 4, characterized in that: The main materials of the noise-reducing layer include IXPE and EVA.

9. A method for preparing the lightweight flame-retardant PETG sheet according to claim 7, characterized in that: include: Step 1: Mix PETG, anti-UV agent, antioxidant, calcium carbonate powder, magnesium hydroxide, aluminum hydroxide, zinc borate and ammonium octamolybdate in proportion, then stir and mix evenly and dry to obtain a raw material; Step 2: putting the raw material into a double-screw extruder for heating and then continuously extruding and molding, and the formed sheet is subjected to a thickness determination process by a four-roll calender to obtain the PETG substrate layer; Step 3: stacking the extruded PETG substrate, the decorative layer and the wear-resistant layer together, rolling them through rollers at 160-190° C. and under a certain pressure, then cooling and cutting; Step 4: The cut sheets are subjected to UV paint treatment, cold-sticking of a sound-proof film, grooving, and chamfering treatment to obtain the lightweight flame-retardant PETG sheet.

10. The method for preparing a lightweight flame-retardant PETG sheet according to claim 9, characterized in that: In the step 1, drying is performed in a hot air circulation dryer at a set temperature of 65-70° C. for 4-6 hours; In the step 2, there are 6 temperature zones for continuous extrusion molding, wherein zone 1 is 220-260°C, zone 2 is 220-260°C, zone 3 is 210-250°C, zone 4 is 180-220°C, zone 5 is 160-200°C, and zone 6 is 160-200°C.

Images