Mildew-proof carpet based on negative pressure driving

Abstract

The utility model discloses a kind of mildew-proof carpets based on negative pressure drive, from bottom to top sequentially include: bottom plate layer, elastic framework layer, breathable buffer layer, backing layer and multicolor surface layer. Bottom plate layer is made of modified polypropylene material, surface is provided with cross ventilation groove, and wet hole is arranged in peripheral edge. Elastic framework layer is fixed on bottom plate layer, by multiple negative pressure response units, negative pressure response unit is in initial state under natural state, when being attracted by negative pressure, it is sucked and forms lifting state, so that carpet bottom layer and ground form gap, slowly rebound to initial state after negative pressure elimination. Breathable buffer layer bottom is provided with air guide groove, for evenly conducting negative pressure to each negative pressure response unit. The utility model uses the negative pressure generated by vacuum cleaner during routine cleaning as driving force, so that carpet bottom layer is automatically lifted to form ventilation gap, without additional power source.

Description

Technical Field

[0001] This utility model relates to the field of carpet technology, specifically to an anti-mildew carpet based on negative pressure drive. Background Technology

[0002] The main reasons for mold growth in the underlayer of carpets are as follows: Firstly, during use, factors such as foot traffic, changes in indoor humidity, and residual moisture from cleaning can cause moisture to seep into the carpet. Because carpets are usually laid close to the floor, there are almost no gaps between the carpet backing and the floor, preventing air circulation and moisture from escaping, causing it to accumulate in the backing over time.

[0003] Secondly, while the multi-layered structure of carpets provides a soft and comfortable feel underfoot, it also results in poor breathability. The layers of pile on the surface and the backing layer further hinder the evaporation and expulsion of moisture. Especially in humid seasons or climates, the relative humidity in the carpet's backing layer can remain at a high level for extended periods.

[0004] Third, traditional carpet cleaning methods mainly rely on vacuum cleaners to remove surface dust, or deep cleaning methods such as water washing and steam cleaning. While these methods can remove stains, water washing and steam cleaning introduce additional moisture, which, if not dried sufficiently, can exacerbate the problem of moisture buildup in the underlying carpet. Moreover, these cleaning methods cannot solve the fundamental problem of insufficient ventilation between the carpet and the floor. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a mildew-proof carpet based on negative pressure drive, which aims to solve the problem of poor ventilation in the bottom layer of existing carpets, which easily accumulates moisture and leads to mold.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A mildew-resistant carpet based on negative pressure drive comprises, from bottom to top: a base layer, an elastic skeleton layer, a breathable cushioning layer, a backing layer, and a multi-colored surface layer.

[0007] The base layer is made of modified polypropylene material, with cross-shaped ventilation grooves on the surface and dehumidification holes around the perimeter. The ventilation grooves and dehumidification holes of the base layer constitute the ventilation and dehumidification system at the bottom of the carpet, providing a channel for moisture to escape.

[0008] The elastic skeleton layer, fixed to the base layer, consists of multiple negative pressure response units. These units are in their initial state under natural conditions. When subjected to negative pressure, they are lifted, creating a gap between the carpet bottom layer and the floor. After the negative pressure is released, they slowly rebound to their initial state. This design allows for easy lifting of the bottom layer during routine cleaning using the negative pressure generated by a vacuum cleaner, creating a ventilation gap. The slow rebound after the negative pressure is released ensures that this ventilation gap is maintained for a considerable period, resulting in thorough ventilation and drying.

[0009] The bottom of the breathable buffer layer has air guide grooves to evenly transmit negative pressure to each negative pressure response unit. The air guide grooves ensure that the negative pressure can act evenly on each negative pressure response unit, so that the entire carpet bottom layer can be raised synchronously to obtain a uniform ventilation effect.

[0010] Furthermore, the venting openings are covered with a one-way breathable membrane. The one-way breathable membrane allows moisture to escape from the carpet backing while preventing external dust and dirt from entering the carpet backing, thus keeping the carpet bottom clean.

[0011] Furthermore, the negative pressure response unit is an inverted bowl-shaped elastic unit made of modified polypropylene material; the elastic unit has a shallow arched structure in its natural state; plasticizers and damping fillers are added to the material. The addition of plasticizers improves the flexibility of the material, making the elastic unit more likely to deform under negative pressure; the addition of damping fillers gives the elastic unit a slow rebound characteristic, prolonging the maintenance time of the raised state.

[0012] Furthermore, the elastic units are arranged in a honeycomb pattern; the density of elastic units at the intersections of the ventilation slots is higher than in other areas. The honeycomb arrangement ensures a uniform distribution of the elastic units, guaranteeing the overall uniformity of the carpet's lifting; increasing the density of elastic units at the intersections of the ventilation slots provides greater lifting force at these key ventilation locations, enhancing the ventilation effect.

[0013] Furthermore, the negative pressure response unit is a bistable spring sheet made of shape memory polymer material. The bistable spring sheet has two stable states: state one is a flat state against the base layer, and state two is an arched state with the center raised. One end of the bistable spring sheet is fixed to the base layer, and the other end is a free end. In its natural state, it is in state one. When the negative pressure reaches a preset threshold, it flips to state two and maintains it for a preset time. By using a bistable spring sheet as the negative pressure response unit, the bistable characteristics of the shape memory polymer are utilized, allowing the spring sheet to maintain state two autonomously for a longer period of time after flipping, without the need for continuous external force, thus extending the ventilation time of the carpet bottom layer.

[0014] Furthermore, the bistable spring sheets are arranged in a grid pattern. This grid pattern ensures that the bistable spring sheets are evenly distributed, guaranteeing a good lifting effect in all areas of the carpet.

[0015] Furthermore, a breathable pressure-increasing film is adhered to the middle of each bistable spring sheet to increase the force-bearing area. The pressure-increasing film increases the force-bearing area under negative pressure, making it easier for the bistable spring sheet to flip under smaller negative pressures, thus improving response sensitivity; at the same time, the pressure-increasing film is made of breathable material, so it does not affect the overall breathability.

[0016] Furthermore, the air-guiding grooves at the bottom of the breathable buffer layer diffuse outwards from the center. This radial groove design allows negative pressure to be evenly transmitted from the center outwards, ensuring that the negative pressure response units in the edge areas can also respond fully.

[0017] Furthermore, the backing layer surface is coated with a modified acrylic emulsion using a dot-matrix coating method, forming coated and uncoated areas. The coated areas provide dimensional stability, while the uncoated areas maintain air permeability. This dot-matrix coating method ensures carpet dimensional stability while preserving ample air permeability, preventing the coating from hindering negative pressure conduction and air circulation.

[0018] Furthermore, breathable bags filled with moisture-absorbing material are placed inside the ventilation channels. The moisture-absorbing material can absorb moisture from the carpet's underlayer, playing a supplementary dehumidification role, further reducing the humidity of the carpet's underlayer, and enhancing the anti-mildew effect.

[0019] Compared with the prior art, the beneficial effects of this utility model are: This invention cleverly utilizes the negative pressure generated by the vacuum cleaner during daily cleaning as a driving force by setting a negative pressure response unit in the elastic skeleton layer, so that the bottom layer of the carpet is automatically raised to form a ventilation gap. No additional power source is required, making it convenient to use and energy-saving and environmentally friendly.

[0020] The negative pressure response unit has a slow rebound characteristic, which can maintain the raised state for a long time after the negative pressure is eliminated, allowing the carpet bottom layer to obtain sufficient ventilation and drying time, effectively reducing the humidity of the bottom layer and preventing mold growth.

[0021] Through the multi-layered ventilation structure design, including ventilation slots and dehumidification holes in the base layer and air guide slots in the breathable buffer layer, uniform negative pressure transmission and efficient moisture discharge are achieved, thus improving the overall mildew prevention effect.

[0022] Two negative pressure response unit solutions are provided: inverted elastic unit and bistable spring sheet. The appropriate solution can be selected according to different usage environments and requirements, and the application range is wide.

[0023] The design incorporates dot-matrix coating and breathable materials, ensuring both structural stability and excellent breathability, without affecting negative pressure conduction and air circulation. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model before the application of negative pressure; Figure 2 This is a schematic diagram of the structure of the elastic unit after it is lifted under negative pressure in Embodiment 2 of this utility model.

[0026] Explanation of reference numerals in the attached figures: 1-Base plate layer, 11-Ventilation slot, 12-Dehumidification hole; 2-Elastic skeleton layer, 21-Inverted elastic unit, 22-Bistable spring sheet; 3-Breathable cushioning layer, 32-Adhesive; 4-Backing layer; 5-Multi-colored surface layer. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Example 1: Reference Figure 1 This embodiment provides a mildew-resistant carpet based on negative pressure drive, which includes, from bottom to top: a base layer 1, an elastic skeleton layer 2, a breathable cushioning layer 3, a backing layer 4, and a multi-colored surface layer 5.

[0029] The base layer 1 is made of modified polypropylene material with a thickness of 2-3mm. The surface has cross-shaped ventilation grooves 11 with a width of 10mm and a depth of 5mm, and the groove spacing is 120mm. Every 40cm around the perimeter of the base layer 1, there are 6mm diameter dehumidification holes 12, and the holes are covered with a one-way breathable membrane.

[0030] The elastic skeleton layer 2 consists of multiple inverted bowl-shaped elastic units 21. The elastic units 21 are made of modified polypropylene material, with a diameter of 40 mm and a wall thickness of 0.6 mm. The elastic unit 21 has a height of 4 mm in its natural state and has a shallow arched structure.

[0031] The elastic units 21 are arranged in a honeycomb pattern with a unit spacing of 50mm, and approximately 150 elastic units 21 are placed per square meter, achieving a coverage rate of 60%. The elastic units 21 are fixed to the base plate layer 1, and the density of elastic units 21 at the intersection of the ventilation slots 11 is increased by 20%. 15% plasticizer and 8% damping filler are added to the material of the elastic units 21, so that they can be attracted to a height of 8-10mm when subjected to a negative pressure of 4-6kPa, and slowly rebound after the negative pressure is removed, with a rebound time of 6-8 hours.

[0032] The breathable cushioning layer 3 is made of polyurethane foam material with a thickness of 2.5mm and an air permeability of ≥800mm / s. Radial air channels, 1.5mm deep and 5mm wide, are formed at the bottom of the breathable cushioning layer 3, spreading outwards from the center to ensure uniform negative pressure transmission to each elastic unit 21. The breathable cushioning layer 3 is bonded to the elastic skeleton layer 2 with adhesive 32, using a dot-matrix coating method to maintain overall breathability.

[0033] A breathable bag containing silica gel particles is placed inside the ventilation slot 11 at a dosage of 80g / m² to serve as a moisture-absorbing and buffering agent.

[0034] Backing layer 4 is made of needle-punched nonwoven fabric with a thickness of 1.5 mm and an air permeability of ≥600 mm / s. A modified acrylic emulsion is coated onto the surface of backing layer 4 using a dot-matrix coating method, covering 35% of the surface area. The coated area provides dimensional stability, while the uncoated area maintains air permeability.

[0035] Multi-colored surface layer 5 is made of blended yarn using a tufting process. The air permeability of multi-colored surface layer 5 is ≥650mm / s.

[0036] During use, the user cleans the carpet surface with a regular household vacuum cleaner (suction power 5-20kPa). The negative pressure is transmitted to the elastic skeleton layer 2 through the breathable surface layer (multi-colored surface layer 5) and the breathable buffer layer 3. When the negative pressure reaches 4kPa or higher, the inverted elastic unit 21 is pulled up by the suction, deforming from an initial height of 4mm to 8-10mm, creating a 4-6mm gap between the carpet bottom layer and the ground. After the vacuum cleaner is removed, the elastic unit 21 slowly recovers due to the material's memory rebound properties, maintaining the raised state for 6-8 hours.

[0037] During this period, dry air enters the bottom layer gap from the edge and center area of ​​the carpet, and moisture is discharged along the ventilation groove 11 to the edge dehumidification hole 12, so that the relative humidity of the bottom layer can be controlled below 65%.

[0038] Example 2: Reference Figure 2 The main difference between this embodiment and Embodiment 1 lies in the structural design of the elastic skeleton layer 2.

[0039] In this embodiment, the elastic skeleton layer 2 uses a bistable spring sheet 22 instead of the elastic unit 21. The bistable spring sheet 22 is made of shape memory polymer (SMP) material with a thickness of 0.4 mm, and has a length of 50 mm and a width of 12 mm. The bistable spring sheet 22 has two stable states: state one is a flat state that is flat against the bottom plate layer 1, and state two is an arched state with a central arch height of 7 mm.

[0040] The bistable spring sheets 22 are arranged in a grid pattern with a spacing of 60mm in both directions, and approximately 120 sheets are arranged per square meter. One end of each bistable spring sheet 22 is fixed to the base plate 1, and the other end is free. In its natural state, the spring sheet 22 is in state one (flat).

[0041] When the vacuum cleaner applies negative pressure, the negative pressure acts on the central region of the bistable spring plate 22. When the negative pressure is ≥5kPa, the bistable spring plate 22 overcomes the energy barrier and flips to state two (arched), at which point the central part of the bistable spring plate 22 is raised to 7mm. State two is metastable, and the bistable spring plate 22 can remain in this state for 8-12 hours. When the carpet is stepped on or negative pressure is applied again, the bistable spring plate 22 flips back to state one.

[0042] The transition temperature of the shape memory polymer is set to 45℃ to ensure good bistable properties at room temperature (15-30℃). To enhance the sensitivity of the negative pressure response, a pressure-boosting film (30mm in diameter and 0.2mm in thickness) is bonded to the middle of each bistable spring sheet 22 to increase the force-bearing area. The air permeability of the pressure-boosting film is ≥1000mm / s.

[0043] The advantage of this structure is its longer retention time (8-12 hours), making it suitable for humid environments or usage scenarios with low cleaning frequency. The rest of the structure is the same as in Example 1.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0045] Those skilled in the art should understand that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments that fall within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A mildew-resistant carpet based on negative pressure drive, characterized in that... From bottom to top, they include: The base layer (1), elastic skeleton layer (2), breathable cushioning layer (3), backing layer (4), and multi-colored surface layer (5); The bottom plate layer (1) is made of modified polypropylene material, with cross-shaped ventilation grooves (11) on the surface and dehumidification holes (12) around the perimeter. The elastic skeleton layer (2) is fixed on the base plate layer (1) and is composed of multiple negative pressure response units. The negative pressure response unit is in the initial state under natural conditions. When it is attracted by negative pressure, it is sucked up to form a lifted state, so that the carpet bottom layer and the ground are separated. After the negative pressure is eliminated, it slowly rebounds to the initial state. The bottom of the breathable buffer layer (3) has an air guide groove for uniformly transmitting negative pressure to each negative pressure response unit.

2. The anti-mildew carpet based on negative pressure drive according to claim 1, characterized in that... The opening of the dehumidification hole (12) is covered with a one-way breathable membrane.

3. The anti-mildew carpet based on negative pressure drive according to claim 1, characterized in that... : The negative pressure response unit is an inverted bowl-shaped elastic unit (21) made of modified polypropylene material; The elastic unit (21) has a shallow arched structure in its natural state; plasticizers and damping fillers are added to the material.

4. The anti-mildew carpet based on negative pressure drive according to claim 3, characterized in that... : The elastic units (21) are arranged in a honeycomb pattern; the density of elastic units (21) at the intersection of the ventilation slots (11) is higher than that in other areas.

5. The anti-mildew carpet based on negative pressure drive according to claim 1, characterized in that... : The negative pressure response unit is a bistable spring sheet (22) made of shape memory polymer material; The bistable spring sheet (22) has two stable states: state one is a flat state that is flat against the bottom plate layer (1), and state two is an arched state with the middle part raised; One end of the bistable spring sheet (22) is fixed on the bottom plate layer (1), and the other end is a free end; it is in state one in its natural state, and flips to state two when the negative pressure reaches a preset threshold and remains there for a preset time.

6. The anti-mildew carpet based on negative pressure drive according to claim 5, characterized in that... The bistable spring sheet (22) is arranged in a grid pattern.

7. The anti-mildew carpet based on negative pressure drive according to claim 5 or 6, characterized in that... A breathable pressure-increasing film is glued to the middle of each bistable spring sheet (22) to increase the force-bearing area.

8. The anti-mildew carpet based on negative pressure drive according to claim 7, characterized in that... The air-guiding grooves at the bottom of the breathable buffer layer (3) spread outward from the center.

9. The anti-mildew carpet based on negative pressure drive according to claim 1, characterized in that... The backing layer (4) is coated with a modified acrylic emulsion in a dot-coating manner to form a coated area and an uncoated area. The coated area provides dimensional stability, while the uncoated area maintains a breathable channel.

10. The anti-mildew carpet based on negative pressure drive according to claim 1, characterized in that... Place a breathable bag containing moisture-absorbing material inside the ventilation slot (11).

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