Elastic thin film material for outer side surface of luminous floor tile and preparation method of elastic thin film material

Abstract

The invention provides an elastic film material for the outer side surface of a luminous floor tile and a preparation method of the elastic film material. The elastic film material is prepared from the following raw material components in parts by weight: 70-75 parts of polyisobutene, 30-40 parts of methyl vinyl silicone rubber, 15-35 parts of barium sulfate, 5-25 parts of talcum powder, 5-10 parts of fumed silica, 1-2 parts of an antioxidant, 0.5-3 parts of titanium dioxide, 0.1-5 parts of pigment and 100 parts of a base film. The elastic film material disclosed by the invention has the advantages of excellent bearing protection performance, lasting waterproof sealing effect, self-adaptive filling capability, excellent weather resistance, good adhesive property and color stability; the luminous floor tile can be widely used for protecting the outer sides of various luminous floor tiles; the luminous floor tile can be effectively protected from being damaged by rainwater, dust and mechanical impact, and the service life of the luminous floor tile is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of film materials, and relates to an elastic film material and a preparation method thereof, and in particular to an elastic film layer material for the outer side of luminous floor tiles. The elastic film layer material has excellent load-bearing protection and waterproof sealing performance, and can effectively extend the service life of the luminous floor tiles. Background Art

[0002] As urban development continues, some newly built urban areas are installing embedded ground traffic lights along zebra crossings to improve pedestrian safety. Some of these lights are illuminated by luminous tiles. These tiles have a similar exterior structure to conventional tiles and, when not illuminated, flash red and green to alert or illuminate pedestrians and vehicles. The tops of these tiles are flush with the road surface, ensuring smooth passage for both vehicles and pedestrians.

[0003] In existing technology, luminous floor tiles typically use a metal frame as a base, within which the corresponding light-emitting device is mounted. However, because the luminous tiles themselves need to bear weight, while the metal frame generally does not, their durability is poor. Furthermore, existing luminous floor tiles do not conform well to the exterior surface, and gaps between them inevitably allow liquids to penetrate, leading to structural decay and loosening, resulting in a short service life.

[0004] Specifically, the existing luminous floor tiles have the following major technical problems: (1) Insufficient load-bearing capacity of the metal frame: The metal frame is easily deformed during long-term use and cannot effectively bear the weight of vehicles and pedestrians, resulting in damage to the internal electronic components. (2) Poor waterproof sealing performance: Traditional luminous floor tiles are mostly sealed with materials such as silicone, but silicone is prone to aging and loss of elasticity during long-term outdoor use, resulting in a decrease in waterproof performance, rainwater seeping into the gaps, and accelerating corrosion of the internal structure. (3) Cumbersome installation: In the existing technology, the installation of luminous floor tiles requires pre-buried wire channels, which is complicated to construct and difficult to maintain later. (4) It is difficult to completely fill the gap: Due to manufacturing precision and installation errors, it is difficult to completely eliminate the gap between the luminous floor tiles and the ground. Even if sealing materials are used, the sealing effect cannot be maintained for a long time.

[0005] In view of the above problems, it is urgent to provide an elastic film material for the outer side of luminous floor tiles. Through the special composition design of the elastic film material, the problems of poor durability, insufficient waterproof sealing performance, and complex installation of luminous floor tiles in the existing technology can be solved. Summary of the Invention

[0006] Based on the defects of the prior art, the first purpose of the present invention is to provide an elastic film material for the outer side of luminous floor tiles; the second purpose of the present invention is to provide a method for preparing the elastic film material; the third purpose of the present invention is to provide the application of the elastic film material as an elastic film layer for the outer side of luminous floor tiles; the elastic film layer is arranged to wrap and adhere to the periphery of the brick body and the base in the vertical direction, and is used to fill the gap between the luminous floor tiles and the ground after the luminous floor tiles are installed in the ground; the thickness of the elastic film layer is preferably set to 75mm, which can effectively fill the gap between the luminous floor tiles and the ground, and prevent rainwater penetration from causing material decay and structural loosening. The elastic film layer is squeezed to a tense state during the installation process, and the elasticity is released after the installation is completed, and the asphalt surface on the outer grooved side wall is elastically reset and squeezed for a second time, so that the elastic film layer after the secondary deformation becomes a shape that fits the asphalt surface, thereby effectively filling the gap.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] In one aspect, the present invention provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0009]

[0010] In the present invention, the polyisobutylene serves as the base material of the elastic film layer, providing excellent air tightness and elasticity; the barium sulfate serves as a filler to enhance the compressive strength and dimensional stability of the elastic film layer; the talc reduces the shrinkage of the elastic film layer and improves wear resistance; the titanium dioxide can improve the whiteness and hiding power of the film material, and adjust the light transmittance and reflectivity; the meteorological silica is modified with a silane coupling agent and serves as a reinforcing filler to enhance the surface hardness and interfacial bonding strength of the elastic film layer; the methyl vinyl silicone rubber (MVRS) provides adhesion to floor tiles and the ground through silane coupling; the antioxidant prevents oxidative degradation of the material during processing and outdoor use; the base film serves as the base layer of the elastic film layer to enhance the bonding effect; the pigment is used to match the color of the floor tiles and shield internal electronic components.

[0011] In the above elastic film materials, preferably, the polyisobutylene is selected from one or more of polyisobutylene 950, polyisobutylene 550 and polyisobutylene 240, but is not limited thereto.

[0012] In the above elastic film material, preferably, the molecular weight of the polyisobutylene 950 is 20,000-45,000; the molecular weight of the polyisobutylene 550 is 10,000-20,000; and the molecular weight of the polyisobutylene 240 is 200-10,000.

[0013] In the present invention, polyisobutylene (PIB) is used as the base material for the elastic film layer, which can provide excellent airtightness and elasticity. Polyisobutylene is a saturated linear polymer. Its molecular chain contains no double bonds and no long chain branches. Its structural unit is -(CH2-C(CH3)2)-, with no asymmetric carbon atoms and connected in a regular head-to-tail sequence. In its undeformed state, polyisobutylene is an amorphous polymer. At room temperature, high-molecular-weight polyisobutylene chains crystallize when stretched, forming a spiral chain structure with every eight structural units in the crystalline region. This unique spiral chain structure gives polyisobutylene excellent elastic recovery and tear resistance, making it an ideal sealing and load-bearing material. Among them, high-molecular-weight polyisobutylene (such as type 950) has better airtightness and aging resistance, but is more difficult to process; medium-molecular-weight polyisobutylene (such as type 550) has better processing performance and appropriate elasticity.

[0014] In the present invention, methyl vinyl silicone rubber (MVRS) is used, which provides adhesion to floor tiles and asphalt through silane coupling. MVRS is an elastomer with a Si-O-Si backbone structure, which has excellent thermal stability, high and low temperature resistance, electrical insulation, and viscoelasticity. When blended with polyisobutylene, MVRS forms an interpenetrating network (IPN) with PIB. In a preferred embodiment of the present invention, a weight ratio of PIB:VMQ = 70:30 can achieve optimal storage modulus and processing performance, improving the overall strength and bonding properties of the material.

[0015] In the present invention, barium sulfate is used as a filler to enhance the compressive strength and dimensional stability of the elastic film layer. Barium sulfate is an inorganic filler with a high density (about 4.2 g / cm 3 ), which can effectively disperse stress and improve the rigidity and hardness of the material. Adding barium sulfate to the polyisobutylene matrix can form a more stable three-dimensional network structure, significantly improving the mechanical strength and durability of the material.

[0016] In the above elastic film material, preferably, the talc powder is selected from hydrated magnesium silicate ZZ-F30-00, but is not limited thereto.

[0017] In the present invention, talc, preferably hydrated magnesium silicate ZZ-F30-00, is used to reduce shrinkage of the elastic film layer and improve wear resistance. Adding talc to the polyisobutylene matrix can reduce internal stress and shrinkage during the curing process, improve the material's dimensional stability, and enhance surface wear resistance.

[0018] In the above elastic film material, preferably, the fumed silica is obtained by hydrolyzing nano-silica with a silane coupling agent in an organic solution to obtain organically modified nano-silica, namely the fumed silica.

[0019] In the above elastic film material, preferably, the particle size of the nano-silicon dioxide is 5 to 50 nm.

[0020] In the above elastic film material, preferably, the organic solvent is selected from toluene, but is not limited thereto.

[0021] In the above elastic film material, preferably, the pH value of the hydrolysis reaction is 3-4; the reaction temperature is 70-75° C.; and the reaction time is 7-8 hours.

[0022] In the above elastic film material, preferably, the particle size of the fumed silica is 0.5 to 1 μm.

[0023] In the present invention, the use of fumed silica modified with a silane coupling agent as a reinforcing filler can enhance the surface hardness and interfacial bonding strength of the elastic film layer. Fumed silica is a nano-scale amorphous silica product produced by high-temperature hydrolysis of halogen silane in a hydrogen-oxygen flame. The primary particle size is between 5 and 50 nm, the aggregate size is between 100 and 500 nm, and the specific surface area is 100 to 400 m 2 After modification with a silane coupling agent (such as KH550), the hydroxyl groups on the surface of the fumed silica are replaced by organic groups, which enhances the compatibility with the polyisobutylene matrix, forms a stable three-dimensional network structure, and significantly improves the material's reinforcement properties and surface hardness.

[0024] In the above elastic film material, preferably, the antioxidant is selected from Irgaox 1010, but is not limited thereto.

[0025] In this invention, the antioxidant Irgaox 1010 can prevent oxidative degradation of the material during processing and outdoor use. Irgaox 1010 is a highly effective hindered phenolic antioxidant that effectively captures free radicals and slows the oxidative degradation of polyisobutylene and methyl vinyl silicone rubber. It also exhibits excellent weather resistance and can withstand long-term use in temperatures ranging from -35°C to +150°C without failure.

[0026] In the above elastic film material, preferably, the titanium dioxide is selected from rutile type 218, but is not limited thereto.

[0027] In the present invention, the use of titanium dioxide can improve the whiteness and hiding power of the film material, and adjust the light transmittance and reflectivity; in addition, titanium dioxide helps to resist UV aging, heat resistance, acid and alkali resistance, and extend the service life of the film material in outdoor / high temperature environments; not only that, titanium dioxide also has better mechanical properties, can improve the tensile and tear strength of the film material, and balance the elasticity and rigidity requirements.

[0028] In the above elastic film material, preferably, the pigment is selected from carbon black, iron oxide yellow or chromium oxide green; but not limited thereto.

[0029] In this invention, different colored pigments (e.g., black, yellow, green, etc.) are used to match the color of the floor tiles and to shield the internal electronic components. The pigments are processed through a special dispersion process to be evenly dispersed in the polyisobutylene matrix and will not fade or discolor due to ultraviolet radiation.

[0030] Among the above elastic film materials, preferably, the base film is selected from the silicon base film PH-50, but not limited thereto.

[0031] In the present invention, a base film is used as the base layer for the elastic film layer to enhance bonding. The base film PH-50 used in the present invention is a silicone base film with excellent chemical stability and adhesive properties. Its surface is plasma-treated or coated with a silane coupling agent (such as KH550), which enhances interfacial bonding with the PIB / MVRS mixture and improves overall bonding strength.

[0032] On the other hand, the present invention also provides a method for preparing the elastic film material, which comprises the following steps:

[0033] Step 1: adding polyisobutylene and methyl vinyl silicone rubber into a two-roll mixer or an internal mixer, blending them at high temperature, and adding an antioxidant during the blending process;

[0034] Step 2: further adding fumed silica, barium sulfate, talc, titanium dioxide, and pigment to the blend, and continuing to stir and blend to ensure that the filler is fully dispersed to obtain a composite material;

[0035] Step 3: Continue heating the composite material until it is in a molten state, and use a blade coater or a roller coater to coat it on the base film, controlling the coating speed and blade gap to form an elastic film layer;

[0036] Step 4: thermally curing the elastic film layer to obtain an elastic film material.

[0037] In the above preparation method, preferably, in step 1, the temperature of the high-temperature blending reaction is 120-150°C.

[0038] In the above preparation method, preferably, in step 3, the temperature of the continuously elevated temperature is 150-180° C.; the coating speed is controlled to be 0.5-1 m / min, and the scraper gap is 50-100 μm.

[0039] In the above preparation method, in step 4, the curing temperature is 120-130° C. and the curing time is 2-3 hours.

[0040] In the above-mentioned preparation method, the thickness of the elastic film material is 70-80 mm, preferably 75 mm. This thickness can effectively fill the gap between the luminous floor tiles and the ground.

[0041] In another aspect, the present invention further provides the use of the aforementioned elastic film material as an elastic film layer for the exterior of luminous floor tiles. The elastic film material of the present invention can be widely used to protect the exteriors of various luminous floor tiles, particularly in high-traffic areas such as crosswalks and intersections. This elastic film material effectively protects the luminous floor tiles from damage by rain, dust, and mechanical impact, extending their service life. Furthermore, this elastic film material can also be used in other applications requiring waterproof sealing and load-bearing protection, such as building exterior walls and underground pipelines.

[0042] The elastic film material of the present invention is squeezed into a tense state during the installation process, and the elasticity is released after the installation is completed, and the asphalt surface on the outer groove side wall is elastically reset and squeezed for the second time, so that the elastic film after the secondary deformation becomes a shape that fits the asphalt surface.

[0043] Beneficial effects of the present invention:

[0044] The elastic film material of the present invention has the following significant advantages:

[0045] (1) Excellent load-bearing protection performance: Through the interpenetrating network structure (IPN) design of polyisobutylene and methyl vinyl silicone rubber, the elastic film layer can withstand a pressure of up to 2 tons / square meter, which is much higher than the load-bearing capacity of traditional metal frames, effectively protecting the electronic components inside the luminous floor tiles from damage.

[0046] (2) Long-lasting waterproof sealing effect: The polyisobutylene matrix has extremely low gas permeability and excellent air tightness. Combined with the three-dimensional network reinforcement of meteorological silica, the elastic film layer can maintain sealing performance for a long time. It is not easy to age even in harsh environments such as ultraviolet rays and high temperatures, and effectively prevents structural decay caused by rainwater penetration.

[0047] (3) Adaptive filling capability: After being squeezed during the installation process, the elastic film layer can slowly release its elasticity and perform a secondary elastic reset squeeze on the peripheral grooved side wall, so that the gap is completely filled, forming a close bond with the ground asphalt, and avoiding the reappearance of gaps caused by shrinkage or aging of traditional sealing materials.

[0048] (4) Excellent weather resistance: By adding antioxidants and adopting a special filler modification process, the elastic film layer has excellent weather resistance and can be used for a long time in the temperature range of -35℃ to +150℃ without failure.

[0049] (5) Good bonding performance: The chemical bonding between methyl vinyl silicone rubber and the base film PH-50 enhances the bonding strength between the elastic film layer and the floor tiles and the ground, making it less likely to fall off after installation.

[0050] (6) Color stability: By optimizing the pigment dispersion process, the elastic film layer can maintain color stability during long-term outdoor use and will not fade or change color due to ultraviolet radiation.

[0051] The elastic film material of the present invention can be widely used to protect the exterior surfaces of various luminous floor tiles, particularly in high-traffic areas such as crosswalks and intersections. It effectively protects the tiles from damage caused by rain, dust, and mechanical impact, extending their service life. Furthermore, the elastic film material can also be used in other applications requiring waterproof sealing and load-bearing protection, such as building exterior walls and underground pipelines.

[0052] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. The process, conditions, reagents, experimental techniques, etc. for implementing the present invention, except for the contents specifically mentioned below, are common knowledge and common common sense in the art, and the present invention does not particularly limit the content.

[0054] Example 1:

[0055] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0056]

[0057] in:

[0058] The preparation method of the fumed silica is as follows:

[0059] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0060] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0061] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0062] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0063] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0064] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0065] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0066] (1) Tensile strength and elongation at break test:

[0067] Test standard: GB / T 1040.3 or ASTM D882.

[0068] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0069] Test results: tensile strength: 2.3MPa; elongation at break: 350%.

[0070] (2) Air tightness test:

[0071] Test standard: GB / T 1038 differential pressure method.

[0072] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0073] Test result: 5% (23°C, 72h).

[0074] (3) Bond strength test:

[0075] Test standard: GB / T 7754.

[0076] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0077] Test results: shear strength is 18.5MPa.

[0078] (4) Waterproof test:

[0079] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0080] Test results: No leakage.

[0081] (5) Anti-UV aging and color stability test:

[0082] Test standard: ISO 4892-2, UVA-340 lamp.

[0083] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0084] Test results: tensile strength retention rate 85%; ΔE<2.

[0085] Example 2:

[0086] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0087]

[0088] in:

[0089] The preparation method of the fumed silica is as follows:

[0090] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0091] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0092] (1) 70 parts of polyisobutylene (550 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0093] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 2 parts of yellow iron oxide pigment were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0094] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0095] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0096] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0097] (1) Tensile strength and elongation at break test:

[0098] Test standard: GB / T 1040.3 or ASTM D882.

[0099] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0100] Test results: tensile strength: 2.1MPa; elongation at break: 400%.

[0101] (2) Air tightness test:

[0102] Test standard: GB / T 1038 differential pressure method.

[0103] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0104] Test results: 6% (23°C, 72h).

[0105] (3) Bond strength test:

[0106] Test standard: GB / T 7754.

[0107] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0108] Test results: shear strength is 17.8MPa.

[0109] (4) Waterproof test:

[0110] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0111] Test results: No leakage.

[0112] (5) Anti-UV aging and color stability test:

[0113] Test standard: ISO 4892-2, UVA-340 lamp.

[0114] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0115] Test results: tensile strength retention rate 82%; ΔE<3.

[0116] Example 3:

[0117] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0118]

[0119]

[0120] in:

[0121] The preparation method of the fumed silica is as follows:

[0122] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0123] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0124] (1) 70 parts of polyisobutylene (240 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0125] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 2 parts of chromium oxide green pigment were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0126] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0127] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0128] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0129] (1) Tensile strength and elongation at break test:

[0130] Test standard: GB / T 1040.3 or ASTM D882.

[0131] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0132] Test results: tensile strength: 1.9MPa; elongation at break: 450%.

[0133] (2) Air tightness test:

[0134] Test standard: GB / T 1038 differential pressure method.

[0135] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0136] Test results: 7% (23°C, 72h).

[0137] (3) Bond strength test:

[0138] Test standard: GB / T 7754.

[0139] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0140] Test results: shear strength is 17.2MPa.

[0141] (4) Waterproof test:

[0142] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0143] Test results: No leakage.

[0144] (5) Anti-UV aging and color stability test:

[0145] Test standard: ISO 4892-2, UVA-340 lamp.

[0146] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0147] Test results: tensile strength retention rate 78%; ΔE<4.

[0148] Example 4:

[0149] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0150]

[0151]

[0152] in:

[0153] The preparation method of the fumed silica is as follows:

[0154] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0155] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0156] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0157] (2) Then, 8 parts of fumed silica, 15 parts of barium sulfate, 25 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0158] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0159] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0160] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0161] (1) Tensile strength and elongation at break test:

[0162] Test standard: GB / T 1040.3 or ASTM D882.

[0163] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0164] Test results: tensile strength: 2.0 MPa; elongation at break: 380%.

[0165] (2) Air tightness test:

[0166] Test standard: GB / T 1038 differential pressure method.

[0167] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0168] Test results: 6% (23°C, 72h).

[0169] (3) Bond strength test:

[0170] Test standard: GB / T 7754.

[0171] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0172] Test results: shear strength is 18.0MPa.

[0173] (4) Waterproof test:

[0174] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0175] Test results: No leakage.

[0176] (5) Anti-UV aging and color stability test:

[0177] Test standard: ISO 4892-2, UVA-340 lamp.

[0178] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0179] Test results: tensile strength retention rate 83%; ΔE<2.5.

[0180] Example 5:

[0181] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0182]

[0183] in:

[0184] The preparation method of the fumed silica is as follows:

[0185] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0186] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0187] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0188] (2) Then, 5 parts of fumed silica, 30 parts of barium sulfate, 10 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0189] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0190] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0191] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0192] (1) Tensile strength and elongation at break test:

[0193] Test standard: GB / T 1040.3 or ASTM D882.

[0194] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0195] Test results: tensile strength: 2.5MPa; elongation at break: 320%.

[0196] (2) Air tightness test:

[0197] Test standard: GB / T 1038 differential pressure method.

[0198] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0199] Test result: 4% (23°C, 72h).

[0200] (3) Bond strength test:

[0201] Test standard: GB / T 7754.

[0202] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0203] Test results: shear strength is 19.2MPa.

[0204] (4) Waterproof test:

[0205] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0206] Test results: No leakage.

[0207] (5) Anti-UV aging and color stability test:

[0208] Test standard: ISO 4892-2, UVA-340 lamp.

[0209] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0210] Test results: tensile strength retention rate 80%; ΔE<3.

[0211] Example 6:

[0212] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0213]

[0214] in:

[0215] The preparation method of the fumed silica is as follows:

[0216] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0217] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0218] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0219] (2) Then, 10 parts of fumed silica, 35 parts of barium sulfate, 5 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0220] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0221] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0222] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0223] (1) Tensile strength and elongation at break test:

[0224] Test standard: GB / T 1040.3 or ASTM D882.

[0225] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0226] Test results: tensile strength: 2.7MPa; elongation at break: 280%.

[0227] (2) Air tightness test:

[0228] Test standard: GB / T 1038 differential pressure method.

[0229] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0230] Test result: 3% (23°C, 72h).

[0231] (3) Bond strength test:

[0232] Test standard: GB / T 7754.

[0233] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0234] Test results: shear strength is 20.5MPa.

[0235] (4) Waterproof test:

[0236] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0237] Test results: No leakage.

[0238] (5) Anti-UV aging and color stability test:

[0239] Test standard: ISO 4892-2, UVA-340 lamp.

[0240] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0241] Test results: tensile strength retention rate 75%; ΔE<4.

[0242] Example 7:

[0243] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0244]

[0245] in:

[0246] The preparation method of the fumed silica is as follows:

[0247] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0248] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0249] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 2.0 parts of antioxidant Irgaox1010 were added.

[0250] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0251] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0252] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0253] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0254] (1) Tensile strength and elongation at break test:

[0255] Test standard: GB / T 1040.3 or ASTM D882.

[0256] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0257] Test results: tensile strength: 2.4MPa; elongation at break: 340%.

[0258] (2) Air tightness test:

[0259] Test standard: GB / T 1038 differential pressure method.

[0260] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0261] Test results: 4.5% (23°C, 72h).

[0262] (3) Bond strength test:

[0263] Test standard: GB / T 7754.

[0264] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0265] Test results: shear strength is 19.0MPa.

[0266] (4) Waterproof test:

[0267] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0268] Test results: No leakage.

[0269] (5) Anti-UV aging and color stability test:

[0270] Test standard: ISO 4892-2, UVA-340 lamp.

[0271] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0272] Test results: tensile strength retention rate 88%; ΔE<2.

[0273] Example 8:

[0274] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0275]

[0276]

[0277] in:

[0278] The preparation method of the fumed silica is as follows:

[0279] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0280] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0281] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0282] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 2.0 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0283] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0284] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0285] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0286] (1) Tensile strength and elongation at break test:

[0287] Test standard: GB / T 1040.3 or ASTM D882.

[0288] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0289] Test results: tensile strength: 2.3MPa; elongation at break: 350%.

[0290] (2) Air tightness test:

[0291] Test standard: GB / T 1038 differential pressure method.

[0292] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0293] Test results: 4.8% (23°C, 72h).

[0294] (3) Bond strength test:

[0295] Test standard: GB / T 7754.

[0296] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0297] Test results: shear strength is 18.8MPa.

[0298] (4) Waterproof test:

[0299] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0300] Test results: No leakage.

[0301] (5) Anti-UV aging and color stability test:

[0302] Test standard: ISO 4892-2, UVA-340 lamp.

[0303] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0304] Test results: tensile strength retention rate 86%; ΔE<2.5.

[0305] Example 9:

[0306] This embodiment provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0307]

[0308] in:

[0309] The preparation method of the fumed silica is as follows:

[0310] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0311] This embodiment also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0312] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0313] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0314] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 1 m / min and the blade gap is controlled to be 100 μm to form an elastic film layer with a thickness of 75 mm.

[0315] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0316] The elastic film material prepared in this embodiment was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0317] (1) Tensile strength and elongation at break test:

[0318] Test standard: GB / T 1040.3 or ASTM D882.

[0319] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0320] Test results: tensile strength: 2.5MPa; elongation at break: 330%.

[0321] (2) Air tightness test:

[0322] Test standard: GB / T 1038 differential pressure method.

[0323] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0324] Test results: 4.2% (23°C, 72h).

[0325] (3) Bond strength test:

[0326] Test standard: GB / T 7754.

[0327] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0328] Test results: shear strength is 21.0MPa.

[0329] (4) Waterproof test:

[0330] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0331] Test results: No leakage.

[0332] (5) Anti-UV aging and color stability test:

[0333] Test standard: ISO 4892-2, UVA-340 lamp.

[0334] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0335] Test results: tensile strength retention rate 87%; ΔE<2.2.

[0336] Comparative Example 1:

[0337] This comparative example provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0338]

[0339] This comparative example also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0340] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0341] (2) Then, 8 parts of nano-silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0342] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0343] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0344] The elastic film material prepared in this comparative example was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0345] (1) Tensile strength and elongation at break test:

[0346] Test standard: GB / T 1040.3 or ASTM D882.

[0347] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0348] Test results: tensile strength: 1.8MPa; elongation at break: 300%.

[0349] (2) Air tightness test:

[0350] Test standard: GB / T 1038 differential pressure method.

[0351] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0352] Test results: 12% (23°C, 72h).

[0353] (3) Bond strength test:

[0354] Test standard: GB / T 7754.

[0355] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0356] Test results: shear strength is 14.5MPa.

[0357] (4) Waterproof test:

[0358] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0359] Test results: Slight leakage.

[0360] (5) Anti-UV aging and color stability test:

[0361] Test standard: ISO 4892-2, UVA-340 lamp.

[0362] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0363] Test results: tensile strength retention rate 65%; ΔE>5.

[0364] Comparative Example 2:

[0365] This comparative example provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0366]

[0367] in:

[0368] The preparation method of the fumed silica is as follows:

[0369] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0370] This comparative example also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0371] (1) 70 parts of polyisobutylene (950 model) were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox 1010 were added.

[0372] (2) Then, 8 parts of fumed silica, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0373] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0374] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0375] The elastic film material prepared in this comparative example was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0376] (1) Tensile strength and elongation at break test:

[0377] Test standard: GB / T 1040.3 or ASTM D882.

[0378] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0379] Test results: tensile strength: 1.5MPa; elongation at break: 280%.

[0380] (2) Air tightness test:

[0381] Test standard: GB / T 1038 differential pressure method.

[0382] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0383] Test results: 8% (23°C, 72h).

[0384] (3) Bond strength test:

[0385] Test standard: GB / T 7754.

[0386] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0387] Test results: shear strength is 10.2MPa.

[0388] (4) Waterproof test:

[0389] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0390] Test results: There is obvious leakage.

[0391] (5) Anti-UV aging and color stability test:

[0392] Test standard: ISO 4892-2, UVA-340 lamp.

[0393] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0394] Test results: tensile strength retention rate 70%; ΔE>4.

[0395] Comparative Example 3:

[0396] This comparative example provides an elastic film material for the outer surface of a luminous floor tile. The raw material components for preparing the elastic film material include, in parts by weight:

[0397]

[0398] in:

[0399] The preparation method of the fumed silica is as follows:

[0400] Nano-silica (particle size 5-50nm) and silane coupling agent KH550 are mixed in toluene and subjected to a hydrolysis reaction. The pH value of the hydrolysis reaction is 4; the reaction temperature is 75°C; the reaction time is 8 hours. After the reaction is completed, organically modified nano-silica is formed, namely the fumed silica, whose particle size is 0.5-1μm. The modified fumed silica has the advantages of low specific surface area and high dispersibility.

[0401] This comparative example also provides a method for preparing the elastic film material, and the specific steps are as follows:

[0402] (1) 70 parts of polyisobutylene (950 model) and 30 parts of methyl vinyl silicone rubber were added to a two-roll mixer and blended at 120° C. During the blending process, 1.5 parts of antioxidant Irgaox1010 were added.

[0403] (2) Then, 20 parts of calcium carbonate, 25 parts of barium sulfate, 15 parts of talc ZZ-F30-00, 1.5 parts of titanium dioxide, and 1 part of pigment carbon black were added to the blend, and the mixture was stirred and blended in a high-speed shear disperser at 120° C. to ensure that the filler was fully dispersed to obtain a composite material.

[0404] (3) The composite material is further heated to 150°C to be in a molten state, and is coated on the base film using a blade coater. The coating speed is controlled to be 0.5 m / min and the blade gap is controlled to be 50 μm to form an elastic film layer with a thickness of 75 mm.

[0405] (4) The elastic film layer is thermally cured at 120° C. for 2 h, and then cooled to obtain an elastic film material.

[0406] The elastic film material prepared in this comparative example was subjected to tensile properties, fracture properties, air tightness, bonding strength, waterproof properties, UV aging resistance and color stability test experiments.

[0407] (1) Tensile strength and elongation at break test:

[0408] Test standard: GB / T 1040.3 or ASTM D882.

[0409] Test method: Prepare dumbbell-shaped specimens and stretch them on a tensile testing machine at a speed of 100 mm / min until they break. Record the maximum load and elongation at break.

[0410] Test results: tensile strength: 1.7MPa; elongation at break: 290%.

[0411] (2) Air tightness test:

[0412] Test standard: GB / T 1038 differential pressure method.

[0413] Test method: Place the sample between the two compartments of a permeation cell. Fill the upper compartment with high-purity nitrogen (purity ≥ 99.999%) and evacuate the lower compartment to ≤ 10 Pa. At 23°C, record the pressure change in the lower compartment after 24 hours and calculate the gas transmission rate.

[0414] Test result: 10% (23°C, 72h).

[0415] (3) Bond strength test:

[0416] Test standard: GB / T 7754.

[0417] Test method: Paste the sample onto the test plate and roll it back and forth three times at a speed of 300mm / min using a roller. Load the sample at a speed of 300mm / min on an electronic universal testing machine, record the maximum load at shear failure, and calculate the shear strength.

[0418] Test results: shear strength is 13.8MPa.

[0419] (4) Waterproof test:

[0420] Test method: Place the sample under 1MPa water pressure, soak for 24 hours, and observe whether there is leakage.

[0421] Test result: leakage.

[0422] (5) Anti-UV aging and color stability test:

[0423] Test standard: ISO 4892-2, UVA-340 lamp.

[0424] Test method: Place the sample in a UV aging box with a light intensity of 0.55W / m 2 @340nm, temperature 60℃, cycle 24h (8h illumination + 16h condensation). After testing, evaluate the tensile strength retention and color stability.

[0425] Test results: tensile strength retention rate 68%; ΔE>4.5.

[0426] The elastic film materials prepared in Examples 1 to 9 and the elastic film materials prepared in Comparative Examples 1 to 3 were subjected to respective performance testing experiments. The comparative experimental results show that:

[0427] (1) In terms of tensile strength and elongation at break tests, the tensile strengths of Examples 1 to 9 were all between 1.5 and 2.7 MPa, and the elongations at break were between 280% and 450%, which were much higher than the performance of Comparative Examples 1 to 3.

[0428] (2) In terms of air tightness test, the air tightness (compression set) of Examples 1 to 9 is between 3% and 7%, which is much lower than the performance of Comparative Examples 1 to 3 (10% to 12%).

[0429] (3) In terms of bonding strength test, the bonding strength of Examples 1 to 9 ranged from 17.2 to 21.0 MPa, which was much higher than the performance of Comparative Example 2 (10.2 MPa).

[0430] (4) In terms of waterproofness test, Examples 1 to 9 had no leakage, while Comparative Examples 1 to 3 had leakage to varying degrees.

[0431] (5) In terms of UV aging resistance and color stability tests, the tensile strength retention of Examples 1 to 9 was between 75% and 88%, and the color stability (ΔE) was between 2 and 4.5, which were much higher than the performance of Comparative Examples 1 to 3.

[0432] In summary, the elastic film material of the present invention exhibits excellent load-bearing protection, durable waterproof sealing, adaptive filling capacity, excellent weather resistance, good adhesion, and color stability. It can be widely used to protect the exterior surfaces of various luminous floor tiles, particularly in high-traffic areas such as crosswalks and intersections. This elastic film material effectively protects luminous floor tiles from damage caused by rain, dust, and mechanical impact, extending their service life.

[0433] Specific embodiments are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An elastic film material for the outer surface of a luminous floor tile, characterized in that: The raw material components for preparing the elastic film material include, by weight:

2. The elastic film material according to claim 1, characterized in that: The polyisobutylene is selected from one or more of polyisobutylene 950, polyisobutylene 550 and polyisobutylene 240; Preferably, the molecular weight of the polyisobutylene 950 is 20,000-45,000; the molecular weight of the polyisobutylene 550 is 10,000-20,000; and the molecular weight of the polyisobutylene 240 is 200-10,000.

3. The elastic film material according to claim 1, characterized in that: The talc is selected from hydrated magnesium silicate ZZ-F30-00.

4. The elastic film material according to claim 1, characterized in that: The fumed silica is obtained by hydrolyzing nano-silica and a silane coupling agent in an organic solution to obtain organically modified nano-silica, namely the fumed silica.

5. The elastic film material according to claim 4, characterized in that: The particle size of the nano-silicon dioxide is 5 to 50 nm; Preferably, the silane coupling agent is selected from KH550; Preferably, the organic solvent is selected from toluene; Preferably, the pH value of the hydrolysis reaction is 3-4; the reaction temperature is 70-75°C; and the reaction time is 7-8h; Preferably, the particle size of the fumed silica is 0.5 to 1 μm.

6. The elastic film material according to claim 1, characterized in that: The antioxidant is selected from Irgaox 1010; Preferably, the titanium dioxide is selected from rutile 218.

7. The elastic film material according to claim 1, characterized in that: The pigment is selected from carbon black, iron oxide yellow or chromium oxide green; Preferably, the base film is selected from silicon base film PH-50.

8. The method for preparing the elastic film material according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: adding polyisobutylene and methyl vinyl silicone rubber into a two-roll mixer or an internal mixer, blending at high temperature, and adding an antioxidant during the blending process; Step 2: further adding fumed silica, barium sulfate, talc, titanium dioxide, and pigment to the blend, and continuing to stir and blend to ensure that the filler is fully dispersed to obtain a composite material; Step 3: Continue heating the composite material until it is in a molten state, and use a blade coater or a roller coater to coat it on the base film, controlling the coating speed and blade gap to form an elastic film layer; Step 4: thermally curing the elastic film layer to obtain an elastic film material.

9. The preparation method according to claim 8, characterized in that: In step 1, the temperature of the high-temperature blending reaction is 120-150°C; Preferably, in step 3, the temperature of the continuous heating is 150-180° C.; the coating speed is controlled to be 0.5-1 m / min, and the scraper gap is 50-100 μm; Preferably, in step 4, the curing temperature is 120-130° C. and the curing time is 2-3 hours; Preferably, the thickness of the elastic film material is 70-80 mm, preferably 75 mm.

10. Use of the elastic film material according to any one of claims 1 to 7 or the elastic film material prepared by the preparation method according to claim 8 or 9 as an elastic film layer for the outer side of luminous floor tiles.

Images