Folding-resistant double-spraying chemical fiber canvas
By designing a corrugated groove in the folding layer of the canvas and filling it with composite strips of carbon fiber and aramid fiber, combined with a mesh layer and an ink-absorbing coating, the problem of fiber breakage caused by stress concentration during the folding process of the canvas is solved, achieving higher folding resistance and flexibility.
Patent Information
- Application Number
- CN202520744734.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-19
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-19
AI Technical Summary
Existing canvases are prone to fiber fatigue and breakage due to stress concentration during folding, especially linen, which is more brittle and repeated folding can lead to fiber breakage.
The design incorporates a folding layer, which includes creating corrugated grooves in the folding layer and filling them with composite strips of carbon fiber and aramid fiber. Combined with upper and lower mesh layers and an ink-absorbing coating, it disperses stress at the folds and uses polyurethane elastomer to fill the crest grooves to improve flexibility.
By uniformly distributing stress, the tensile or compressive stress of the fibers is reduced, thereby improving the folding resistance of the canvas, reducing the risk of breakage, and enhancing flexibility and dimensional stability.
Smart Images
Figure CN223864609U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of oil painting cloth especially relates to a folding resistant double spray chemical fiber oil painting cloth. BACKGROUND
[0002] Oil painting cloth is a kind of cloth for painting on the specific cloth base material coated with the coating preventing oil, solvent, water and the like from penetrating, and is used for drawing oil painting. The coating cloth used for spray drawing, photography, indoor and outdoor advertising, light box and the like is also called oil painting cloth. The material used for making hand-drawn oil painting cloth is mainly tight and flat cotton canvas and linen. Chemical fiber cloth is extremely flat and smooth, and is suitable for spray drawing and printing.
[0003] The existing oil painting cloth needs to be folded when being transported or stored due to space limitation (such as mailing and long-distance transportation), especially the large-size canvas without mounting, and the oil painting without mounting can be temporarily stored due to exhibition and display requirements, and directly folded. The existing oil painting cloth is mainly made of linen, and although the linen fiber is strong, it has high brittleness, and repeated folding can cause fiber fatigue fracture.
[0004] Therefore, it is necessary to provide a new folding resistant double spray chemical fiber oil painting cloth to solve the above technical problems. CONTENT OF THE UTILITY MODEL
[0005] To solve the above technical problems, the utility model provides a folding resistant double spray chemical fiber oil painting cloth.
[0006] The folding resistant double spray chemical fiber oil painting cloth provided by the utility model includes chemical fiber gray cloth, the top of the chemical fiber gray cloth is fixedly connected with an upper grid layer, the bottom of the chemical fiber gray cloth is fixedly connected with a butt joint layer, the top of the upper grid layer is fixed with a folding resistant layer, the folding resistant layer is horizontally provided with a wave groove, a plurality of wave trough grooves are arranged at the positions corresponding to the wave troughs of the wave groove at the top of the folding resistant layer, a plurality of wave peak grooves are arranged at the positions corresponding to the wave peaks of the wave groove at the top of the folding resistant layer, and the wave trough grooves and the wave peak grooves are respectively filled with first folding resistant material and second folding resistant material.
[0007] Preferably, the butt joint layer includes a lower grid layer and a corrugated layer, the top of the lower grid layer is fixedly connected to the bottom of the chemical fiber gray cloth, and the top of the corrugated layer is fixedly connected to the bottom of the lower grid layer.
[0008] Preferably, the top of the folding resistant layer and the bottom of the corrugated layer are respectively fixedly connected with a top ink absorption coating and a bottom ink absorption coating.
[0009] Preferably, the first folding resistant material is a carbon fiber and aramid fiber composite strip, wherein the tensile strength of the carbon fiber is 3.5-3.8 GPa, and the elongation at break of the aramid fiber is >3.5%.
[0010] Preferably, the second flexural material is a polyurethane elastomer, and the tensile strength of the polyurethane elastomer is 28-30 MPa.
[0011] Preferably, the wavelength of the corrugated layer is 10-12 mm and the amplitude is 0.3-0.8 mm.
[0012] Preferably, the thickness of the top ink-absorbing coating and the bottom ink-absorbing coating are equal.
[0013] Compared with related technologies, the fold-resistant double-jet synthetic fiber canvas provided by this utility model has the following beneficial effects:
[0014] 1. By creating wavy grooves in the folding layer, the pre-formed curved structure of the wavy grooves makes the canvas deform evenly when folded, avoiding stress concentration at a certain point. The wavy grooves allow the canvas to deform gradually in a "wavy" shape when folded, rather than being rigidly bent, thereby reducing the tensile or compressive stress on the fibers.
[0015] 2. Through the upper and lower mesh layers, the mesh structure can distribute the stress at the creases to the entire plane, reducing the risk of breakage. The tensile strength of carbon fiber is 3.5-3.8 GPa, and the elongation at break of aramid fiber is >3.5%. Carbon fiber provides longitudinal support, while aramid fiber absorbs transverse shear force. The composite strips of carbon fiber and aramid fiber further improve the folding resistance of the canvas. Attached Figure Description
[0016] Figure 1 A schematic diagram of the structure of the fold-resistant double-sprayed synthetic fiber canvas provided by this utility model;
[0017] Figure 2 for Figure 1 The diagram shows a decomposed structural representation of the structure.
[0018] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the structure.
[0019] The labels in the diagram are: 1. Chemical fiber woven fabric; 2. Upper mesh; 3. Fold-resistant layer; 4. Corrugated groove; 5. Corrugated trough; 6. Corrugated crest; 7. Top ink-absorbing coating; 8. Lower mesh; 9. Corrugated layer; 10. Bottom ink-absorbing coating. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0021] Please refer to the following: Figures 1-3 ,in, Figure 1 A schematic diagram of the structure of the fold-resistant double-sprayed synthetic fiber canvas provided by this utility model; Figure 2 for Figure 1An exploded structural schematic view of the structure shown; Figure 3 To Figure 1 A cross-sectional structural schematic view of the structure shown.
[0022] In the specific implementation process, as Figures 1-3 As shown, the top of the chemical fiber fabric 1 is fixedly connected with an upper grid 2 layer, the bottom of the chemical fiber fabric 1 is fixedly connected with a docking layer, the top of the upper grid 2 layer is fixedly connected with a folding-resistant layer 3, the folding-resistant layer 3 is transversely provided with a wave groove 4, a plurality of wave trough grooves 5 are provided at positions corresponding to wave troughs of the wave groove 4 at the top of the folding-resistant layer 3, and a plurality of wave crest grooves 6 are provided at positions corresponding to wave crests of the wave groove 4 at the top of the folding-resistant layer 3, the wave trough grooves 5 and the wave crest grooves 6 are respectively filled with first folding-resistant material and second folding-resistant material, the wave groove 4 is provided on the folding-resistant layer 3, the wave groove 4 is pre-formed into a curved structure, the deformation of the canvas is more uniform when folding, and stress is avoided from being concentrated at a certain point, the wave groove 4 makes the canvas gradually deform in a "wave shape" when folding, rather than being rigidly bent, so that the tensile or compressive stress of the fiber is reduced.
[0023] The docking layer comprises a lower grid 8 layer and a corrugated layer 9, the top of the lower grid 8 layer is fixedly connected to the bottom of the chemical fiber fabric 1, and the top of the corrugated layer 9 is fixedly connected to the bottom of the lower grid 8 layer, the wavelength of the corrugated layer 9 is 10-12 mm, and the amplitude is 0.3-0.8 mm, the grid structure can disperse the stress at the folding crease to the entire plane and reduce the risk of breakage through the upper grid 2 layer and the lower grid 8 layer.
[0024] The top of the folding-resistant layer 3 and the bottom of the corrugated layer 9 are respectively fixedly connected with a top ink-absorbing coating layer 7 and a bottom ink-absorbing coating layer 10, and the thicknesses of the top ink-absorbing coating layer 7 and the bottom ink-absorbing coating layer 10 are equal.
[0025] The first folding-resistant material is a carbon fiber and aramid fiber composite strip, the tensile strength of the carbon fiber is 3.5-3.8 GPa, the elongation at break of the aramid fiber is >3.5%, the carbon fiber provides longitudinal support, and the aramid fiber absorbs transverse shear force, the folding resistance of the canvas is further improved through the carbon fiber and aramid fiber composite strip, the fiber strip is embedded into the wave trough groove 5 through a prepreg process, and vacuum hot pressing solidification is performed.
[0026] The second folding-resistant material is a polyurethane elastomer, the tensile strength of the polyurethane elastomer is 28-30 MPa, the polyurethane elastomer is poured into the wave crest groove 6, and a protective layer is formed after ultraviolet curing or normal temperature curing, the polyurethane elastomer forms a soft layer after solidification, and does not break with the folding deformation of the fabric.
[0027] The working principle of this utility model is as follows: By creating a wave groove 4 in the folding layer 3, the wave groove 4, through a pre-formed curved structure, makes the canvas deform more uniformly during folding, avoiding stress concentration at a certain point. The wave groove 4 allows the canvas to deform gradually in a "wave" shape during folding, rather than being rigidly bent, thereby reducing the tensile or compressive stress of the fibers. Through the upper mesh layer 2 and the lower mesh layer 8, the mesh structure can distribute the stress at the crease to the entire plane, reducing the risk of breakage. The tensile strength of carbon fiber is 3.5-3.8 GPa, and the breaking elongation of aramid fiber is >3.5%. Carbon fiber provides longitudinal support, and aramid fiber absorbs transverse shear force. The composite strip of carbon fiber and aramid fiber further improves the folding resistance of the canvas. Since the top ink-absorbing coating 7 and the bottom ink-absorbing coating 10 are of equal thickness, they deform synchronously during folding, which can effectively reduce the internal stress gradient. The thermal expansion coefficient matching of the equal thickness coating is higher, improving dimensional stability.
[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.
[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A fold-resistant double-jet synthetic fiber canvas, characterized in that, The fabric includes a chemical fiber woven fabric (1), with an upper mesh (2) layer fixedly connected to the top of the chemical fiber woven fabric (1) and a butt joint layer fixedly connected to the bottom of the chemical fiber woven fabric (1). A folding-resistant layer (3) is fixedly attached to the top of the upper mesh (2) layer. A wave groove (4) is opened laterally on the folding-resistant layer (3). Multiple trough grooves (5) are opened at the top of the folding-resistant layer (3) corresponding to the trough of the wave groove (4). Multiple crest grooves (6) are opened at the top of the folding-resistant layer (3) corresponding to the crest of the wave groove (4). The trough grooves (5) and the crest grooves (6) are respectively filled with a first folding-resistant material and a second folding-resistant material.
2. The fold-resistant double-jet synthetic fiber canvas according to claim 1, characterized in that, The docking layer includes a lower mesh (8) layer and a corrugated layer (9). The top of the lower mesh (8) layer is fixedly connected to the bottom of the chemical fiber fabric (1), and the top of the corrugated layer (9) is fixedly connected to the bottom of the lower mesh (8) layer.
3. The fold-resistant double-jet synthetic fiber canvas according to claim 2, characterized in that, The top of the folding layer (3) and the bottom of the corrugated layer (9) are respectively fixedly connected with a top ink-absorbing coating (7) and a bottom ink-absorbing coating (10).
4. The fold-resistant double-jet synthetic fiber canvas according to claim 1, characterized in that, The first flexural material is a composite strip of carbon fiber and aramid fiber, wherein the tensile strength of carbon fiber is 3.5-3.8 GPa and the elongation at break of aramid fiber is >3.5%.
5. The fold-resistant double-jet synthetic fiber canvas according to claim 1, characterized in that, The second flexural material is a polyurethane elastomer, and the tensile strength of the polyurethane elastomer is 28-30 MPa.
6. The fold-resistant double-jet synthetic fiber canvas according to claim 2, characterized in that, The wavelength of the corrugated layer (9) is 10-12 mm and the amplitude is 0.3-0.8 mm.
7. The fold-resistant double-jet synthetic fiber canvas according to claim 3, characterized in that, The top ink-absorbing coating (7) and the bottom ink-absorbing coating (10) have the same thickness.