Floor protection film for decoration

Abstract

The application discloses a ground protection film for decoration and belongs to the technical field of high polymer material products. The protection film comprises a first layer, a second layer and a third layer which are sequentially stacked: the first layer is an anti-wear and anti-skid layer, the material of which comprises metallocene linear low-density polyethylene and low-density polyethylene, and the surface thereof is provided with an embossed texture; the second layer is a puncture-resistant reinforcing layer, the material of which comprises high-density polyethylene and metallocene linear low-density polyethylene; and the third layer is a buffer layer, the material of which comprises ethylene-vinyl acetate copolymer and polyolefin elastomer; and a water-based acrylic ester pressure-sensitive adhesive layer and a release film can be optionally arranged on the lower surface of the third layer. The preparation method comprises the steps of respectively extruding the three layers of raw materials, co-extrusion molding, carrying out corona treatment after cooling and embossing, coating a water-based pressure-sensitive adhesive and compounding a release film. The product has the advantages of puncture resistance being greater than or equal to 50 N, surface static friction coefficient being greater than or equal to 0.6, no residual glue when being torn off, total volatile organic compound release rate being less than or equal to 0.20 mg / (m 2 ·h), and being suitable for indoor decoration ground protection.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a floor protection film for decoration. Background Technology

[0002] During interior decoration construction, installed flooring materials such as tiles, stone, wood flooring, and composite flooring are susceptible to contamination from liquid materials such as cement mortar, putty, latex paint, and wood varnish, as well as impact and puncture damage from falling tools, scaffolding, ladders, and other hard objects. Furthermore, frequent foot traffic can cause surface wear, and the accumulation of construction materials can lead to localized indentations and scratches. Therefore, temporary covering and protection of the floor is usually necessary during construction.

[0003] Existing ground protection film products mainly include the following categories:

[0004] (1) Single-layer polyethylene film: This type of film has good water resistance, low cost, and large width, but it is usually thin, has low puncture resistance, poor cushioning performance, and low surface friction coefficient, making it easy to slide and shift during construction.

[0005] (2) Polypropylene woven fabric composite film: This type of composite film has high tensile strength and good tear resistance, but has a low surface friction coefficient and is easy to slide after being laid; some products are fixed with pressure-sensitive adhesive, and there is obvious residue problem after tearing.

[0006] (3) Non-woven composite membrane: This type of composite membrane is soft and easy to lay, but it has poor puncture resistance, limited water resistance, and is easily contaminated by cement slurry.

[0007] (4) Polyvinyl chloride foam rolls: This type of roll has good cushioning performance, but there is a risk of plasticizer migration, and the release of volatile organic compounds is high, resulting in poor environmental performance.

[0008] In summary, existing ground protection film products cannot simultaneously meet the comprehensive requirements of puncture resistance, slip resistance, cushioning, low residual adhesive, and low volatile organic compound release. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the above-mentioned technical difficulties and provide a floor protection film for decoration, which simultaneously has high puncture resistance, good surface anti-slip properties, good cushioning performance, no residue after removal, and low release of volatile organic compounds.

[0010] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a floor protection film for decoration, comprising a first layer, a second layer and a third layer stacked sequentially; the first layer is made of metallocene linear low-density polyethylene and low-density polyethylene, and the surface of the first layer away from the second layer has an embossed texture; the second layer is made of high-density polyethylene and metallocene linear low-density polyethylene; the third layer is made of ethylene-vinyl acetate copolymer and polyolefin elastomer.

[0011] As an improvement, a fourth layer and a fifth layer are sequentially provided on the side of the third layer away from the second layer, wherein the fourth layer is a water-based acrylic pressure-sensitive adhesive layer and the fifth layer is a release film.

[0012] As an improvement, the thickness of the first layer is 20μm~60μm, the thickness of the second layer is 20μm~50μm, and the thickness of the third layer is 200μm~800μm.

[0013] As an improvement, the material of the first layer, by weight parts, includes:

[0014] 60-85 parts of metallocene linear low-density polyethylene;

[0015] 10-30 parts of low-density polyethylene;

[0016] 5-15 parts of polyethylene masterbatch with calcium carbonate as inorganic filler;

[0017] Polyethylene wax 0.5 to 2 parts.

[0018] As an improvement, the material of the second layer includes: 60-80 parts of high-density polyethylene and 20-40 parts of metallocene linear low-density polyethylene.

[0019] As an improvement, the material of the third layer, by weight parts, comprises: 50-70 parts of ethylene-vinyl acetate copolymer, 20-40 parts of polyolefin elastomer, and 20-40 parts of polyolefin elastomer.

[0020] This invention also provides a method for preparing a floor protective film for decoration, comprising the following steps:

[0021] S1: The first layer of raw material, the second layer of raw material and the third layer of raw material are respectively added to three extruders for plasticization, and then co-extruded through a co-extrusion die to obtain a three-layer co-extruded film;

[0022] S2: Cooling, embossing and corona treatment are performed on the three-layer co-extruded film to form an embossed texture on the surface of the first layer;

[0023] S3: Apply water-based acrylic pressure-sensitive adhesive to the corona-treated surface of the third layer, dry it, and then laminate it with a release film. Finally, roll it up and cut it to obtain a floor protection film for decoration.

[0024] As an improvement, the extruder is a single-screw extruder with a length-to-diameter ratio ≥30:1; the extrusion temperature of the first layer of raw material is 160℃~220℃, the extrusion temperature of the second layer of raw material is 170℃~220℃, the extrusion temperature of the third layer of raw material is 160℃~210℃, and the temperature of the co-extrusion die is 210℃~225℃; in S2, the temperature of the cooling roller is 20℃~35℃, the temperature of the embossing roller is 40℃~60℃, and the traction speed is 20m / min~50m / min.

[0025] As an improvement, in S3, the dry coating amount of the water-based acrylic pressure-sensitive adhesive is 15 g / m². 2 ~25g / m 2 The drying tunnel temperature is 80℃~120℃.

[0026] The advantages of this invention compared with the prior art are as follows: By setting a second layer of high-density polyethylene and metallocene linear low-density polyethylene blend, the high crystallinity and rigidity of high-density polyethylene are used to improve the puncture resistance and dimensional stability of the film. The puncture resistance can reach more than 50N, which can effectively resist puncture damage caused by falling construction tools. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a floor protection film for decoration according to the present invention.

[0028] As shown in the figure: 1. First layer; 11. Embossed texture; 2. Second layer; 3. Third layer; 4. Fourth layer; 5. Fifth layer. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] As shown in the figure, Example 1

[0031] First layer, formula 1 (by weight):

[0032] Metallocene linear low-density polyethylene (melt index 1.5 g / 10 min, density 0.918 g / cm³) 3 70 copies

[0033] Low-density polyethylene (melt index 3.0 g / 10 min, density 0.922 g / cm³) 3 20 copies

[0034] 10 parts of polyethylene masterbatch (70% calcium carbonate content) with calcium carbonate as inorganic filler

[0035] 0.8 parts of polyethylene wax

[0036] Second layer, formula 2 (by weight):

[0037] High-density polyethylene (melt index 1.0 g / 10 min, density 0.950 g / cm³) 3 70 copies

[0038] Metallocene linear low-density polyethylene (melt index 1.5 g / 10 min, density 0.918 g / cm³) 3 30 copies

[0039] Third layer, formula 3 (by weight):

[0040] 60 parts of ethylene-vinyl acetate copolymer (vinyl acetate content 18%, melt index 2.0 g / 10 min)

[0041] Polyolefin elastomer (density 0.870 g / cm³) 3 30 portions (melt index 1.0 g / 10 min)

[0042] 10 parts calcium carbonate

[0043] Fourth layer, formula 4 (by weight):

[0044] Water-based acrylic pressure-sensitive adhesive latex 96.5 parts + wetting agent 0.3 parts + defoamer 0.2 parts + crosslinking agent 1.0 part, 180° peel strength 12N / 25mm;

[0045] Fifth layer 5: Single-sided silicone oil coated polyester release film, 25μm thick, release force 10g / 25mm;

[0046] Preparation method:

[0047] S1: The first layer (1), second layer (2), and third layer (3) raw materials are respectively added to three single-screw extruders, each with a length-to-diameter ratio of 30:1. The extrusion temperatures for the first layer (1) are set as follows: feeding section 170℃, compression section 190℃, metering section 210℃; for the second layer (2) raw material, the extrusion temperatures are set as follows: feeding section 180℃, compression section 200℃, metering section 215℃; for the third layer (3) raw material, the extrusion temperatures are set as follows: feeding section 170℃, compression section 185℃, metering section 200℃. The melt from each layer is fed into the co-extrusion die via a three-layer distributor. The die temperature is 220℃, and the mixture is then co-extruded to obtain a three-layer co-extruded film.

[0048] S2: The three-layer co-extruded film is cooled by a cooling roller at 25°C; then, it undergoes surface embossing by an embossing roller at 50°C, forming a raised / recessed embossed texture 11 on the surface of the first layer 1; the traction speed is 35 m / min. The surface of the third layer 3 is subjected to corona treatment with a power density of 20 W·min / m. 2 This allows the surface tension of the third layer to reach over 38 mN / m.

[0049] S3: Water-based acrylic pressure-sensitive adhesive (52% solids content, pH 8.0) is applied to the third layer (3rd corona-treated surface) using a micro-gravure coating method, with a dry adhesive coating amount of 20 g / m². 2 After coating, the film material enters the drying tunnel, which uses a three-stage temperature control system with temperatures of 90℃, 110℃, and 100℃. After drying, a release film (release force 10g / 25mm) is laminated under a lamination pressure of 0.3MPa and a lamination speed of 30m / min. The film is then wound up and slit to obtain the finished floor protection film for decoration. Example 2

[0050] The formulation for the first layer 1 is the same as that in Example 1.

[0051] Second layer, formula 2 (by weight):

[0052] High-density polyethylene (melt index 1.0 g / 10 min, density 0.950 g / cm³) 3 80 copies

[0053] Metallocene linear low-density polyethylene (melt index 1.5 g / 10 min, density 0.918 g / cm³) 3 20 copies

[0054] Third layer, formula 3 (by weight):

[0055] 50 parts of ethylene-vinyl acetate copolymer (vinyl acetate content 18%, melt index 2.0 g / 10 min)

[0056] Polyolefin elastomer (density 0.870 g / cm³) 3 40 portions (melt index 1.0 g / 10 min)

[0057] 10 parts calcium carbonate.

[0058] Fourth layer, 4 formulation (by weight): 97.0 parts water-based acrylic pressure-sensitive adhesive latex + 0.3 parts wetting agent + 0.2 parts defoamer + 1.5 parts crosslinking agent, 180° peel strength 14N / 25mm;

[0059] Fifth layer, formulation 5: single-sided silicone oil coated polyester release film, 30μm thick, release force 15g / 25mm.

[0060] Preparation method:

[0061] Steps S1 to S2 are basically the same as in Example 1, except that the traction speed is adjusted to 30 m / min.

[0062] S3: Dry adhesive coating amount is 20g / m 2 The remaining coating and composite parameters are the same as in Example 1, and the finished floor protection film for decoration is obtained.

[0063] Comparative Example 1

[0064] It uses a single-layer low-density polyethylene film with a thickness of 80μm, and the surface has no embossing treatment and no adhesive layer.

[0065] Comparative Example 2

[0066] The film is a composite of polypropylene woven fabric and polyethylene film, with a thickness of 300μm, and uses solvent-based acrylic pressure-sensitive adhesive with a dry adhesive coating weight of 25g / m. 2 Composite release film.

[0067] Performance testing

[0068] The products obtained in Examples 1-2 and Comparative Examples 1-2 were subjected to performance tests, and the test methods are as follows:

[0069] Tensile strength and nominal strain at break: tested according to the method specified in GB / T1040.3-2006.

[0070] Right-angle tear strength: tested according to the method specified in GB / T16578.2-2009.

[0071] Puncture resistance: Tested according to the method specified in ASTM F1306-21.

[0072] Surface static friction coefficient: tested according to the method specified in GB / T10006-2021.

[0073] 180° peel strength: tested according to the method specified in GB / T2792-2014.

[0074] Tackiness: Tested according to the method specified in GB / T4851-2014.

[0075] Initial tack: Tested according to the method specified in GB / T4852-2002.

[0076] Shore A hardness: The hardness of the third layer was tested according to the method specified in GB / T531.1-2008.

[0077] Total volatile organic compound release rate: tested using the environmental test chamber method according to ISO 16000-6:2011.

[0078] Residual adhesive: The protective film was cut into 25mm×150mm samples, pasted onto the smooth surface of the ceramic tile, and placed at 23℃ and 50% relative humidity for 24 hours. The samples were then peeled off at a uniform speed of 300mm / min at a 180° angle, and the surface of the tile was visually inspected for any residual adhesive. The test results are shown in Table 1.

[0079] Table 1 Performance Test Results

[0080]

[0081] Results Analysis

[0082] As shown in Table 1, the puncture resistance of the floor protection film for decoration in Examples 1 and 2 of the present invention reached 65N and 72N respectively, which is much higher than the 18N of the single-layer polyethylene film in Comparative Example 1 and the 40N of the woven fabric composite film in Comparative Example 2. This indicates that the present invention significantly improves the puncture resistance of the protective film by setting a second layer of high-density polyethylene and metallocene linear low-density polyethylene blend.

[0083] Regarding anti-slip performance, the surface static friction coefficients of Example 1 and Example 2 were 0.68 and 0.66, respectively, which were significantly higher than those of Comparative Example 1 (0.35) and Comparative Example 2 (0.45), indicating that the embossed texture of the first layer effectively improved the surface anti-slip performance.

[0084] Regarding residual adhesive properties, no visible residue was observed after removal of adhesive from Examples 1 and 2, while Comparative Example 2, which used solvent-based pressure-sensitive adhesive, showed significant residue. Furthermore, the total volatile organic compound release rates of Examples 1 and 2 were 0.12 mg / (m³). 2 ·h) and 0.11mg / (m 2 The concentration of 0.85 mg / (m³) in Comparative Example 2 was significantly lower than that in Comparative Example 2. 2 The result (h) indicates that the water-based acrylic pressure-sensitive adhesive system of the present invention effectively reduces the release of volatile organic compounds while achieving low adhesive residue.

[0085] In summary, the floor protection film for decoration provided by this invention has excellent puncture resistance, anti-slip properties, cushioning properties, low residual adhesive properties, and low volatile organic compound release properties, meeting the floor protection needs of mid-to-high-end decoration projects.

[0086] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A floor protection film for decoration, characterized in that: Including the first layer (1), the second layer (2) and the third layer (3) stacked in sequence; The material of the first layer (1) includes metallocene linear low-density polyethylene and low-density polyethylene, and the surface of the first layer (1) away from the second layer (2) has an embossed texture (11). The material of the second layer (2) includes high-density polyethylene and metallocene linear low-density polyethylene; The material of the third layer (3) includes ethylene-vinyl acetate copolymer and polyolefin elastomer.

2. The floor protection film for decoration according to claim 1, characterized in that, The third layer (3) is provided with a fourth layer (4) and a fifth layer (5) on the side away from the second layer (2). The fourth layer (4) is a water-based acrylic pressure-sensitive adhesive layer, and the fifth layer (5) is a release film.

3. The floor protection film for decoration according to claim 1, characterized in that, The thickness of the first layer (1) is 20 μm to 60 μm, the thickness of the second layer (2) is 20 μm to 50 μm, and the thickness of the third layer (3) is 200 μm to 800 μm.

4. The floor protection film for decoration according to any one of claims 1 to 3, characterized in that, By mass fraction, the material of the first layer (1) includes: 60-85 parts of metallocene linear low-density polyethylene; 10-30 parts of low-density polyethylene; 5-15 parts of polyethylene masterbatch with calcium carbonate as inorganic filler; Polyethylene wax 0.5 to 2 parts.

5. The floor protective film for decoration according to any one of claims 1 to 3, characterized in that, The material of the second layer (2) includes: 60-80 parts of high-density polyethylene and 20-40 parts of metallocene linear low-density polyethylene.

6. The floor protection film for decoration according to claim 1, characterized in that, The material of the third layer (3) by mass parts includes: 50-70 parts of ethylene-vinyl acetate copolymer, 20-40 parts of polyolefin elastomer, and 20-40 parts of polyolefin elastomer.

7. A method for preparing a floor protective film for decoration, characterized in that, Includes the following steps: S1: The first layer (1) raw material, the second layer (2) raw material and the third layer (3) raw material are respectively added to three extruders for plasticization, and then co-extruded through a co-extrusion die to obtain a three-layer co-extruded film; S2: Cooling, embossing and corona treatment are performed on the three-layer co-extruded film to form an embossed texture (11) on the surface of the first layer (1); S3: A water-based acrylic pressure-sensitive adhesive is coated on the corona-treated surface of the third layer (3), and after drying, a release film is laminated, rolled up, and cut to obtain a floor protection film for decoration.

8. The method for preparing the floor protective film for decoration according to claim 7, characterized in that, In S1, the extruder is a single-screw extruder with a length-to-diameter ratio ≥30:1; the extrusion temperature of the first layer (1) raw material is 160 ℃~220 ℃, the extrusion temperature of the second layer (2) raw material is 170 ℃~220 ℃, the extrusion temperature of the third layer (3) raw material is 160 ℃~210 ℃, and the temperature of the co-extrusion die is 210 ℃~225 ℃; in S2, the temperature of the cooling roller is 20 ℃~35 ℃, the temperature of the embossing roller is 40 ℃~60 ℃, and the traction speed is 20 m / min~50 m / min.

9. The method for preparing the floor protective film for decoration according to any one of claims 7 or 8, characterized in that, In S3, the dry coating amount of the water-based acrylic pressure-sensitive adhesive is 15 g / m². 2 ~25 g / m 2 The drying tunnel temperature is 80℃~120℃.

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