A masking paper for indoor wall surfaces

Abstract

The utility model discloses a kind of shielding paper for indoor wall, including base layer, the front of base layer is sequentially compounded with first adhesive layer and function layer, the function layer is composed of scratch-proof layer and dustproof layer, and the scratch-proof layer is close to first adhesive layer setting, the back of base layer is compounded with second adhesive layer, the second adhesive layer is divided into edge high tackiness area and middle low tackiness area along base layer length direction, the tackiness value of edge high tackiness area is 1.5-2 times of middle low tackiness area tackiness value, one side of base layer is also fixedly connected with positioning strip, the positioning strip extends along base layer length direction, and the surface of the positioning strip is printed with scale line.Base layer is mainly wet-resistant coating kraft paper, tear-resistant and moisture-proof softening, adapt to different temperature and humidity environment, solve the pain point of traditional shielding paper tearing off. High positioning accuracy, good dustproof effect, and good antibacterial effect, adapt to many dust high-humidity environment.

Description

Technical Field

[0001] This utility model relates to the field of masking paper technology, specifically a masking paper for indoor walls. Background Technology

[0002] During interior wall decoration (such as paint color separation and wallpaper installation), masking paper is needed to protect finished areas (such as baseboards, window frames, and painted walls) to prevent paint and dust contamination. Existing interior wall masking papers mostly use a simple structure with a single paper base layer and a single adhesive layer, which generally has the following technical defects: First, the base layer is mostly ordinary kraft paper without moisture-resistant treatment. During construction, it easily softens and tears when exposed to paint thinner or ambient moisture, losing its masking effect. Second, the adhesive layer has uniform adhesion. If the adhesion is too high, it easily pulls on the wall coating during removal, causing damage; if the adhesion is too low, the edges easily curl and become hollow, failing to withstand contact with construction tools or wind. Third, it lacks a precise positioning structure. First, relying on manual visual inspection or measuring tape for positioning results in an error of 5-10mm, making it prone to rework in high-precision scenarios such as wall color separation and inside and outside corners. Second, its function is limited to basic masking, lacking anti-scratch, dustproof, and antibacterial design, making it easily scratched by construction tools and prone to mold growth in humid environments. At the same time, air is difficult to expel between the base layer and the wall during bonding, easily leaving air bubbles that affect the aesthetics of the decoration. Under temperature changes, it is also prone to cracking due to the stress difference between layers, making it difficult to meet the modern decoration requirements for the stability, functionality, and precision of masking paper. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a masking paper for indoor walls, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A masking paper for interior walls includes a base layer, on the front side of which a first adhesive layer and a functional layer are sequentially laminated. The functional layer is composed of a scratch-resistant layer and a dust-resistant layer, and the scratch-resistant layer is disposed close to the first adhesive layer.

[0006] The back of the base layer is laminated with a second adhesive layer, which is divided into a high-adhesion edge zone and a low-adhesion middle zone along the length of the base layer. The adhesion value of the high-adhesion edge zone is 1.5-2 times that of the low-adhesion middle zone. A positioning strip is also fixedly connected to one side of the base layer. The positioning strip extends along the length of the base layer and has scale lines printed on its surface.

[0007] As a further description of the above technical solution, the anti-scratch layer is a polyvinyl chloride film, and the thickness of the anti-scratch layer is 0.1-0.15mm.

[0008] As a further description of the above technical solution, the dustproof sublayer is a modified polypropylene nonwoven fabric, the thickness of the dustproof sublayer is 0.08-0.12mm, and the surface of the dustproof sublayer is coated with an antibacterial coating.

[0009] As a further description of the above technical solution, the side of the second adhesive layer away from the base layer is covered with release paper, one end of which extends out of the base layer to form an easy-tear portion. The width of the easy-tear portion is 1-1.5cm, and the surface of the easy-tear portion is provided with anti-slip texture.

[0010] As a further description of the above technical solution, the positioning strip is made of transparent PET material, the width of the positioning strip is 0.8-1.2cm, and the thickness of the positioning strip is less than the thickness of the base layer; the minimum scale value of the scale line is 1mm, and the spacing between two adjacent scale lines is 5mm.

[0011] As a further description of the above technical solution, the base layer is a kraft paper layer, the thickness of the base layer is 0.12-0.18mm, and the surface of the base layer is coated with a moisture-resistant coating made of water-based polyurethane.

[0012] As a further description of the above technical solution, the first adhesive layer is an environmentally friendly acrylic adhesive layer, the thickness of the first adhesive layer is 0.05-0.08mm, and the adhesive strength of the first adhesive layer is 8-10N / 25mm.

[0013] As a further description of the above technical solution, the width of the edge high-viscosity zone is 2-3cm, and the bonding strength of the edge high-viscosity zone is 12-15N / 25mm; the bonding strength of the middle low-viscosity zone is 6-8N / 25mm.

[0014] As a further description of the above technical solution, the base layer is also provided with a number of ventilation holes. The ventilation holes are evenly distributed along the length of the base layer and penetrate the front and back of the base layer. The diameter of the ventilation holes is 0.5-1mm and the distance between two adjacent ventilation holes is 2-3cm.

[0015] As a further description of the above technical solution, a buffer sub-layer is provided between the functional layer and the first adhesive layer. The buffer sub-layer is a polyethylene foam layer with a thickness of 0.03-0.05 mm, and the buffer sub-layer is bonded to the functional layer and the first adhesive layer respectively.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model discloses a masking paper for indoor walls, which has at least one of the following beneficial effects during use:

[0018] The base layer is primarily made of moisture-resistant coated kraft paper, which is tear-resistant and prevents softening due to moisture, making it suitable for various temperature and humidity environments. The second adhesive layer features a zoned adhesive design, with strong adhesion at the edges to prevent curling and low adhesion in the middle to leave no residue. Testing showed a 0% wall damage rate, solving the pain points of traditional masking paper removal. Transparent PET positioning strips with fine graduations ensure high positioning accuracy, reducing rework and paint waste in situations such as wall color separation. The functional layer includes a scratch-resistant film to protect against tool scratches, and a dustproof non-woven fabric combined with an antibacterial coating provides excellent dustproof and antibacterial effects, suitable for dusty and humid environments. A buffer layer absorbs impact and buffers interlayer stress, remaining crack-free at temperatures ranging from -5℃ to 40℃. Ventilation holes allow air to escape, preventing air bubbles. The easy-to-tear release paper improves construction efficiency, while the environmentally friendly adhesive meets indoor health requirements, extending the overall lifespan of the masking paper, reducing secondary masking costs, and comprehensively improving decoration quality and construction convenience. Attached Figure Description

[0019] Figure 1 This is an exploded structural diagram of a masking paper for indoor walls according to the present invention.

[0020] Figure 2 This is a partial structural diagram of a masking paper for indoor walls according to the present invention.

[0021] Numbering on the map:

[0022] 1. First adhesive layer; 2. Functional layer; 3. Base layer; 4. Positioning strip; 5. Second adhesive layer; 6. Release paper; 7. Tearable part; 8. High-adhesion edge area; 9. Low-adhesion center area; 10. Ventilation holes; 11. Scratch-resistant layer; 12. Dustproof layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-2 As shown, this utility model provides a masking paper for indoor walls, including a base layer 3. The front side of the base layer 3 is sequentially laminated with a first adhesive layer 1 and a functional layer 2. The functional layer 2 is composed of a scratch-resistant layer 11 and a dust-resistant layer 12, and the scratch-resistant layer 11 is disposed close to the first adhesive layer 1.

[0025] In this embodiment, 0.12-0.18mm thick kraft paper is used as the main body of the base layer 3, with a tensile strength ≥30N / 15mm, providing rigid support for the overall structure and preventing tearing during cutting and bonding. The surface of the base layer 3 is coated with a water-based polyurethane moisture-resistant coating with a water absorption rate ≤5%, which can prevent paint thinner and moisture from penetrating the base layer 3 during construction, avoiding softening and delamination of the base layer 3 (solving the problem of traditional paper masking paper easily deteriorating when wet).

[0026] The first adhesive layer 1 on the front of the base layer 3 (environmentally friendly acrylic adhesive, 0.05-0.08mm thick, with an adhesive strength of 8-10N / 25mm) firmly bonds the functional layer 2 to the base layer 3. Its adhesive strength is higher than the interface bonding force between the functional layer 2 (scratch-proof + dustproof) and the base layer 3 (≤7N / 25mm). After 50 bending tests (10mm diameter cylinder), there is no delamination, ensuring structural stability.

[0027] The back of the base layer 3 is laminated with a second adhesive layer 5. The second adhesive layer 5 is divided into an edge high-adhesion zone 8 and a middle low-adhesion zone 9 along the length of the base layer 3. The adhesion value of the edge high-adhesion zone 8 is 1.5-2 times that of the middle low-adhesion zone 9. A positioning strip 4 is also fixedly connected to one side of the base layer 3. The positioning strip 4 extends along the length of the base layer 3 and the surface of the positioning strip 4 is printed with scale lines.

[0028] The high-adhesion edge zone 8 (2-3cm wide, 12-15N / 25mm adhesion strength) provides strong fixation, ensuring that the masking paper edges do not curl or fall off during construction (due to wind or tool contact), solving the problem of easy hollowing at the edges of traditional masking paper. The low-adhesion center zone 9 (6-8N / 25mm adhesion strength) reduces the adhesion to the wall surface—this value is lower than the adhesion of the wall coating, avoiding pulling on the wall coating when removing it; at the same time, it is higher than the adhesion generated by the weight of the masking paper itself (approximately 3N / 25mm), ensuring that the center area adheres firmly without hollowing.

[0029] The release paper 6 on the surface of the second adhesive layer 5 (with a 1-1.5cm easy-tear section 7 and a surface anti-slip texture Ra=1.5-2μm) can isolate dust and moisture and protect the activity of the adhesive layer; the easy-tear section 7 extends out of the base layer 3, increasing the gripping area for fingers, and can be quickly torn off without tools, improving construction efficiency.

[0030] Furthermore, the anti-scratch layer 11 is a polyvinyl chloride film, and the thickness of the anti-scratch layer 11 is 0.1-0.15mm. It can resist scratches from tools such as sandpaper and roller handles, and prevent paint leakage caused by damage to the masking paper.

[0031] Furthermore, the dustproof sub-layer 12 is made of modified polypropylene nonwoven fabric with a thickness of 0.08-0.12 mm, and its surface is coated with an antibacterial coating. With a porosity of 30%-40%, it can block paint dust and wood chips ≥10μm in size, achieving a dustproof efficiency of ≥95%. The antibacterial coating (on the surface of the dustproof sub-layer 12, with 0.5%-1% silver ion addition) exhibits an antibacterial rate of ≥99% against Escherichia coli and Staphylococcus aureus, and inhibits mold growth in humid environments. This design is suitable for the dusty and humid environments encountered during construction and renovation, extending the lifespan of the masking paper and reducing the cost of secondary masking due to damage or mold.

[0032] Furthermore, the second adhesive layer 5 is covered with release paper 6 on the side away from the base layer 3. One end of the release paper 6 extends beyond the end of the base layer 3 to form an easy-tear portion 7. The width of the easy-tear portion 7 is 1-1.5cm, and the surface of the easy-tear portion 7 is provided with anti-slip texture. This reduces the labor intensity of construction workers, reduces uneven wall paint thickness caused by air bubbles, and improves the aesthetics of the decoration.

[0033] Furthermore, the positioning strip 4 is made of transparent PET material, with a width of 0.8-1.2cm and a thickness less than that of the base layer 3. The minimum scale value of the graduation line is 1mm, and the spacing between two adjacent graduation lines is 5mm. The transparent PET positioning strip 4 (width 0.8-1.2cm, thickness < base layer 3) on the side of the base layer 3 is the core component: the transparent material does not obstruct the wall reference line (such as color separation lines, inside and outside corners), and the surface graduation lines (minimum 1mm, spacing 5mm) directly serve as the measurement reference. Aligning with the wall boundary achieves a positioning accuracy of ±1mm, avoiding the 5-10mm error of traditional visual positioning and reducing rework. It is suitable for high-precision construction scenarios such as wall color separation, waistlines, and inside and outside corners, reducing paint waste and labor time loss caused by boundary offset.

[0034] Furthermore, the base layer 3 is a kraft paper layer with a thickness of 0.12-0.18 mm, and its surface is coated with a moisture-resistant coating made of water-based polyurethane. This adapts to different temperature and humidity environments (such as the rainy season in the south and the dry season in the north), preventing wall protection failure due to structural instability.

[0035] Furthermore, the first adhesive layer 1 is an environmentally friendly acrylic adhesive layer with a thickness of 0.05-0.08 mm and an adhesive strength of 8-10 N / 25 mm. This meets the environmental protection requirements for indoor decoration, protects the health of construction workers and residents, and avoids substandard indoor air quality caused by adhesive pollution.

[0036] Furthermore, the width of the high-adhesion edge zone 8 is 2-3cm, and the bonding strength of the high-adhesion edge zone 8 is 12-15N / 25mm; the bonding strength of the low-adhesion middle zone 9 is 6-8N / 25mm. When removing the masking paper after construction: first slowly peel it off from the high-adhesion edge zone 8 (the narrow width of 2-3cm concentrates the pulling force, and the bonding strength is less than the adhesion of the wall coating), and then peel off the low-adhesion middle zone 9 (the low bonding strength makes it easy to peel off) – verified by 100 bonding-removal tests, the wall residue rate is 0%, and the coating damage rate is 0%, solving the pain points of traditional high-adhesion masking paper of "leaking adhesive and damaging the wall surface after tearing".

[0037] Furthermore, the base layer 3 is provided with several vent holes 10, which are evenly distributed along the length of the base layer 3 and penetrate both the front and back sides of the base layer 3. The diameter of each vent hole 10 is 0.5-1mm, and the spacing between two adjacent vent holes 10 is 2-3cm. The vent holes 10 (0.5-1mm diameter, 2-3cm spacing) penetrate both sides of the base layer 3—during bonding, air between the base layer 3 and the wall surface is discharged through the vent holes 10, preventing air bubbles from remaining; the vent diameter is controlled at 0.5-1mm to ensure efficient air venting while preventing paint penetration, and the uniform spacing ensures even air venting throughout the entire area.

[0038] Furthermore, a buffer sub-layer is provided between the functional layer 2 and the first adhesive layer 1. This buffer sub-layer is a polyethylene foam layer with a thickness of 0.03-0.05 mm, and it is bonded to both the functional layer 2 and the first adhesive layer 1. The polyethylene foam buffer sub-layer (0.03-0.05 mm thick, compression resilience ≥80%) between the functional layer 2 and the first adhesive layer 1 can absorb the impact pressure from construction tools (such as rollers and brushes), preventing localized damage to the functional layer 2. Simultaneously, it buffers the thermal expansion and contraction stress difference between the kraft paper (base layer 3) and the polyvinyl chloride / non-woven fabric (functional layer 2), preventing cracking in environments ranging from -5℃ to 40℃ (solving the problem of traditional masking paper easily cracking due to temperature changes).

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A masking paper for interior walls, characterized in that: The base layer includes a first adhesive layer and a functional layer sequentially bonded to the front side of the base layer. The functional layer is composed of a scratch-resistant layer and a dust-resistant layer, and the scratch-resistant layer is disposed close to the first adhesive layer. The back of the base layer is laminated with a second adhesive layer, which is divided into a high-adhesion edge zone and a low-adhesion middle zone along the length of the base layer. The adhesion value of the high-adhesion edge zone is 1.5-2 times that of the low-adhesion middle zone. A positioning strip is also fixedly connected to one side of the base layer. The positioning strip extends along the length of the base layer and has scale lines printed on its surface.

2. The masking paper for interior walls according to claim 1, characterized in that: The anti-scratch layer is a polyvinyl chloride film, and the thickness of the anti-scratch layer is 0.1-0.15 mm.

3. The masking paper for interior walls according to claim 1, characterized in that: The dustproof sublayer is made of modified polypropylene nonwoven fabric, the thickness of the dustproof sublayer is 0.08-0.12mm, and the surface of the dustproof sublayer is coated with an antibacterial coating.

4. The masking paper for interior walls according to claim 1, characterized in that: The second adhesive layer is covered with release paper on the side away from the base layer. One end of the release paper extends out of the base layer to form an easy-tear section. The width of the easy-tear section is 1-1.5cm, and the surface of the easy-tear section is provided with anti-slip texture.

5. The masking paper for interior walls according to claim 1, characterized in that: The positioning strip is made of transparent PET material, with a width of 0.8-1.2cm and a thickness less than that of the base layer; the minimum scale value of the scale line is 1mm, and the spacing between two adjacent scale lines is 5mm.

6. The masking paper for interior walls according to claim 1, characterized in that: The base layer is a kraft paper layer with a thickness of 0.12-0.18 mm, and the surface of the base layer is coated with a moisture-resistant coating made of water-based polyurethane.

7. The masking paper for interior walls according to claim 1, characterized in that: The first adhesive layer is an environmentally friendly acrylic adhesive layer, the thickness of the first adhesive layer is 0.05-0.08mm, and the adhesive strength of the first adhesive layer is 8-10N / 25mm.

8. The masking paper for interior walls according to claim 1, characterized in that: The width of the high-viscosity edge zone is 2-3 cm, and the bonding strength of the high-viscosity edge zone is 12-15 N / 25 mm; the bonding strength of the low-viscosity middle zone is 6-8 N / 25 mm.

9. The masking paper for interior walls according to claim 1, characterized in that: The base layer is also provided with a number of ventilation holes, which are evenly distributed along the length of the base layer and penetrate through the front and back of the base layer. The diameter of the ventilation holes is 0.5-1mm and the distance between two adjacent ventilation holes is 2-3cm.

10. The masking paper for interior walls according to claim 1, characterized in that: A buffer sub-layer is provided between the functional layer and the first adhesive layer. The buffer sub-layer is a polyethylene foam layer with a thickness of 0.03-0.05 mm, and the buffer sub-layer is bonded to the functional layer and the first adhesive layer respectively.

Images