One-way see-through cloth

Abstract

This utility model discloses a one-way transparent fabric, comprising: a base fabric layer; a black polyurethane coating applied to the surface of the base fabric layer, wherein multiple holes penetrating the base fabric layer and the black polyurethane coating are provided in the black polyurethane coating; and a transparent polyethylene laminating layer covering the black polyurethane coating. The one-way transparent fabric, through the sequentially stacked base fabric layer, black polyurethane coating, and transparent polyethylene laminating layer, and the arrangement of multiple holes, forms an innovative three-layer structure, perfectly integrating optical principles and materials science. It can utilize ambient brightness differences and the characteristics of human vision to restrict the direction of light propagation through physical structure, achieving one-way visibility. Simultaneously, the synergistic effect of each layer of materials endows the product with excellent comprehensive performance, possessing characteristics such as fire resistance, water resistance, wind resistance, heat insulation, and durability, significantly superior to ordinary one-way transparent fabrics on the market.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a one-way transparent fabric. Background Technology

[0002] Existing one-way transparent fabrics mostly use a simple composite structure of base fabric, printed layer and black PE perforated film. Although it can achieve basic one-way transparency, the flammability of PE film itself leads to insufficient fire safety, and the poor sealing of the interlayer interface makes the product weak in windproof, waterproof and environmental adaptability, and cannot meet the high-level safety and comfort requirements of outdoor tents. Utility Model Content

[0003] This utility model aims to solve the technical problems in the prior art mentioned above, and proposes a one-way transparent fabric, comprising: a base fabric layer; a black polyurethane coating coated on the surface of the base fabric layer, wherein a plurality of holes penetrating the base fabric layer and the black polyurethane coating are provided on the black polyurethane coating; and a transparent polyethylene laminating layer covering the black polyurethane coating.

[0004] Furthermore, the aperture of the plurality of holes is 0.8 mm to 1.2 mm, the hole spacing is 3 mm to 7 mm, and they are arranged obliquely at 30° to 60°.

[0005] Furthermore, the aperture of the holes is 1 mm, the spacing between the holes is 5 mm, and they are arranged at a 45° angle.

[0006] Furthermore, the base fabric layer is 120gsm to 150gsm Oxford cloth; the black polyurethane coating has a coating weight of 30gsm to 50gsm; and the transparent polyethylene laminating layer has a basis weight of 20gsm to 30gsm.

[0007] Furthermore, the base fabric layer is 125gsm Oxford cloth.

[0008] Furthermore, the coating amount of the black polyurethane coating is 40 gsm.

[0009] Furthermore, the basis weight of the transparent polyethylene adhesive layer is 25 gsm.

[0010] Furthermore, the black polyurethane coating is a flame-retardant polyurethane coating.

[0011] Furthermore, the transparent polyethylene laminating layer is a biaxially oriented polyethylene film with a light transmittance of ≥90%, and the multiple pores are covered by hot-pressing lamination.

[0012] Furthermore, the base fabric layer is 300D×300D 104T printed Oxford cloth.

[0013] The one-way transparent fabric of this invention comprises an innovative three-layer structure formed by sequentially stacking a base fabric layer, a black polyurethane coating, and a transparent polyethylene laminating layer, along with multiple perforations. This structure perfectly integrates optical principles and materials science, utilizing ambient brightness differences and the characteristics of human vision to restrict the direction of light propagation through physical structure, thus achieving one-way visibility. Simultaneously, the synergistic effect of each layer endows the product with excellent comprehensive performance, possessing properties such as fire resistance, water resistance, wind resistance, heat insulation, and durability, significantly superior to ordinary one-way transparent fabrics on the market.

[0014] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0015] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0016] Figure 1 This is a schematic diagram of one-way transparent fabric layering in one embodiment;

[0017] Figure 2 This is a planar schematic diagram of the black polyurethane coating side of one embodiment.

[0018] Figure Labels

[0019] 1. Base fabric layer; 2. Black polyurethane coating; 3. Transparent polyethylene bonding layer; 4. Pores. Detailed Implementation

[0020] The following discloses various implementations or embodiments of the described subject matter. To simplify the disclosure, specific examples of elements and arrangements are described below. These are merely examples and are not intended to limit the scope of protection of this application. For example, a first feature subsequently described in the specification being formed above or on a second feature can include implementations where the first and second features are formed in a direct connection, or implementations where an additional feature is formed between the first and second features, thus the first and second features may not be directly connected. Furthermore, reference numerals and / or letters may be repeated in different examples in these disclosures. This repetition is for brevity and clarity and does not in itself indicate a relationship between the various implementations and / or structures to be discussed. Further, when a first element is described in connection with or combined with a second element, the description includes implementations where the first and second elements are directly connected or combined with each other, as well as implementations where one or more other intervening elements are added to indirectly connect or combine the first and second elements with each other.

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0022] refer to Figures 1 to 2 In some embodiments, the one-way transparent fabric includes: a base fabric layer 1; a black polyurethane coating 2 coated on the surface of the base fabric layer 1, wherein a plurality of holes 4 penetrating the base fabric layer 1 and the black polyurethane coating 2 are provided on the black polyurethane coating 2; and a transparent polyethylene laminating layer 3 covering the black polyurethane coating 2. The one-way transparent fabric can be used in tent products. The base fabric layer 1 creates a basic darkroom environment, the black polyurethane coating 2 has light-absorbing properties, absorbing more than 95% of reflected light, thus creating a brightness difference, and the plurality of holes 4 provide a unique light transmission channel, and the plurality of holes 4 can be evenly arranged. The transparent polyethylene laminating layer 3 can cover the plurality of holes 4 to optimize the light transmission, windproof and waterproof properties of the one-way transparent fabric, meeting the high-level safety and comfort requirements of outdoor tents.

[0023] In some embodiments, the aperture of the plurality of holes 4 is 0.8mm to 1.2mm, the hole spacing is 3mm to 7mm, and they are arranged obliquely at 30° to 60°. Preferably, the aperture of the holes 4 is 1mm, the hole spacing is 5mm, and they are arranged obliquely at 45°. Experiments have shown that when the aperture is 1mm and the hole spacing is 5mm, the light transmittance can reach 35%, which is the ideal aperture for use. The 45° oblique holes reduce light leakage by 72% under low-angle lighting, solving the problem of "morning and evening failure" of traditional vertically perforated fabric. According to the above-mentioned numerical settings of the holes 4, it is possible to ensure sufficient light transmission inside the tent made of the one-way transparent fabric, while the outline of the holes cannot be identified from the outside, ensuring good concealment, light transmittance, and waterproofness, and also having a certain tensile strength.

[0024] In some embodiments, the base fabric layer 1 is 120 gsm to 150 gsm Oxford cloth; the black polyurethane coating 2 has a coating weight of 30 gsm to 50 gsm; and the transparent polyethylene laminating layer 3 has a weight of 20 gsm to 30 gsm. The weight values ​​of each layer are within a favorable range verified by rigorous material mechanics-optics-thermal coupling simulation. Within this defined weight range, a balance between light-blocking, light absorption, and light transmittance can be ensured, while also being economical. Preferably, the base fabric layer 1 is 125 gsm Oxford cloth. 125 gsm base fabric has a light transmittance of less than 0.5% (EN ISO 105-B02) and a tear strength greater than 300 N (exceeding the EN 13772 tent standard 250 N). Furthermore, for every 5 gsm increase in Oxford cloth, the cost increases by 6%, therefore 125 gsm is also a cost-effectiveness inflection point. Preferably, the black polyurethane coating 2 has a coating weight of 40 gsm. At 40 gsm, the carbon black distribution reaches the percolation threshold (>33 wt%), and the light absorption increases from 92.5% at 30 gsm to 96.8%. 40 gsm is the minimum coating weight to achieve UL94 V-0 rating (self-extinguishing time <3 s after flame removal) (GB 8624 test). Preferably, the transparent polyethylene laminating layer 3 has a basis weight of 25 gsm. At 25 gsm, the crystallinity reaches 65% (DSC test), and the light transmittance of 91.7% is better than 20 gsm / 30 gsm. 25 gsm is the point of sudden increase in the yield strength of the polyethylene film (from 18 MPa at 20 gsm to 25 MPa).

[0025] In some embodiments, the black polyurethane coating 2 is a flame-retardant polyurethane coating. Using a flame-retardant polyurethane coating enables the one-way transparent fabric to have high fire resistance, which greatly improves safety when used outdoors.

[0026] In some embodiments, the transparent polyethylene laminating layer 3 is a biaxially oriented polyethylene film with a light transmittance ≥90%, and is heat-pressed to cover multiple holes 4. The optical-grade film and precision heat-pressing process used enable the unidirectional transparent fabric to simultaneously possess the advantages of light transmittance, sealing, and durability.

[0027] In some embodiments, the base fabric layer 1 is a 300D (denier) × 300D (denier) 104T (threads / inch) printed Oxford cloth. This specification of Oxford cloth simultaneously meets the core requirements of mechanical protection, optical stealth, and environmental concealment.

[0028] According to this utility model, the one-way transparent fabric, through the sequential stacking of a base fabric layer 1, a black polyurethane coating 2, and a transparent polyethylene laminating layer 3, along with multiple holes 4, forms an innovative three-layer structure. This structure perfectly integrates optical principles and materials science, utilizing ambient brightness differences and the characteristics of human vision to restrict the direction of light propagation through physical structure, thus achieving one-way visibility. Simultaneously, the synergistic effect of each layer of materials endows the product with excellent comprehensive performance, possessing properties such as fire resistance, water resistance, wind resistance, heat insulation, and durability, significantly superior to ordinary one-way transparent fabrics on the market.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A one-way transparent fabric, characterized in that, include: Base fabric layer; A black polyurethane coating is applied to the surface of the base fabric layer, wherein a plurality of holes are provided in the black polyurethane coating, penetrating the base fabric layer and the black polyurethane coating. A transparent polyethylene laminating layer covering the black polyurethane coating.

2. The one-way transparent fabric according to claim 1, characterized in that: The aperture of the plurality of holes is 0.8 mm to 1.2 mm, the spacing between the holes is 3 mm to 7 mm, and they are arranged obliquely at 30° to 60°.

3. The one-way transparent fabric according to claim 2, characterized in that: The holes have a diameter of 1 mm, a spacing of 5 mm, and are arranged at a 45° angle.

4. The one-way transparent fabric according to claim 1, characterized in that: The base fabric layer is 120gsm to 150gsm Oxford cloth; the black polyurethane coating has a coating weight of 30gsm to 50gsm; and the transparent polyethylene laminating layer has a basis weight of 20gsm to 30gsm.

5. The one-way transparent fabric according to claim 1, characterized in that: The base fabric layer is 125gsm Oxford cloth.

6. The one-way transparent fabric according to claim 1, characterized in that: The coating amount of the black polyurethane coating is 40 gsm.

7. The one-way transparent fabric according to claim 1, characterized in that: The weight of the transparent polyethylene laminating layer is 25 gsm.

8. The one-way transparent fabric according to claim 1, characterized in that: The black polyurethane coating is a flame-retardant polyurethane coating.

9. The one-way transparent fabric according to claim 1, characterized in that: The transparent polyethylene laminating layer is a biaxially oriented polyethylene film with a light transmittance of ≥90%, and it covers multiple holes by hot pressing.

10. The one-way transparent fabric according to claim 1, characterized in that: The base fabric layer is 300D×300D104T printed Oxford cloth.

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