Multifunctional lightweight paper roll structure with sound absorption and preparation method thereof

Abstract

The application provides a paper roll structure with bearing sound absorption multifunctional light weight and a preparation method. The rational design of the structure realizes the mutual cooperation between the spiral seam and the paper aperture, realizes the high performance sound absorption of the paper, and solves the problems of bearing sound absorption multifunctional integration and light weight design. The paper roll structure with bearing sound absorption multifunctional light weight comprises wide paper strips and narrow paper strips. The wide paper strips and the narrow paper strips are mutually superposed and curled into several layers and are curled in a spiral shape. Air slits are formed between adjacent wide paper strips and narrow paper strips. The preparation method of the paper roll structure with bearing sound absorption multifunctional light weight comprises the following steps: cutting paper into two kinds of paper strips, i.e. wide paper strips and narrow paper strips; pasting the narrow paper strips at the bottom of the wide paper strips to form paper strips with one thick side and one thin side; starting from one end, curling, and tightly pasting the thick side of the bottom of the wide paper strip, so that the paper roll structure with bearing sound absorption multifunctional light weight is obtained.

Description

TECHNICAL FIELD

[0001] The application relates to a paper roll structure with bearing sound absorption multifunctional lightweight and a preparation method, and belongs to the technical field of sound absorption and noise reduction. BACKGROUND

[0002] At present, most sound absorption materials are porous materials, including foamed metal, foamed polyurethane and natural fiber materials and the like. The sound absorption principle of the materials is that air friction with the pore wall surface of the materials converts kinetic energy into heat energy and dissipates the heat energy. The sound absorption performance of the porous materials is closely related to the microstructure morphology, and the pores cannot be accurately controlled due to the limitation of the preparation process. In addition, the porous materials have many defects in the preparation process, and the mechanical properties are damaged, so the porous materials cannot be used as multifunctional bearing structures. In summary, the traditional porous materials cannot meet the noise control requirements of high-end equipment, and a bearing sound absorption multifunctional lightweight structure is urgently needed. SUMMARY

[0003] In view of the defects in the prior art, the application provides a paper roll structure with bearing sound absorption multifunctional lightweight and a preparation method, and the mutual cooperation between the spiral seams and the paper pores is realized through reasonable design of the structure, high-performance sound absorption of the paper is realized, and the problems of bearing sound absorption multifunctional integration and lightweight design are solved.

[0004] In order to achieve the above-mentioned purpose, the following technical scheme is adopted:

[0005] A paper roll structure with bearing sound absorption multifunctional lightweight comprises wide paper strips and narrow paper strips, the wide paper strips and the narrow paper strips are stacked and curled into a plurality of layers and are curled in a spiral shape, and air slits are formed between adjacent wide paper strips and narrow paper strips.

[0006] On the basis of the paper roll structure with bearing sound absorption multifunctional lightweight, the wide paper strips and the narrow paper strips are rice paper, office paper or kraft paper, and the thickness is 0.05-0.5 mm.

[0007] On the basis of the paper roll structure with bearing sound absorption multifunctional lightweight, the width of the wide ceramic fiber paper strip is 10-100 mm.

[0008] On the basis of the paper roll structure with bearing sound absorption multifunctional lightweight, the width of the narrow paper strip is 1-10 mm.

[0009] On the basis of the paper roll structure with bearing sound absorption multifunctional lightweight, the cross-sectional shape is circular, triangular or petal-shaped.

[0010] On the basis of the paper roll structure with bearing sound absorption multifunctional lightweight, the density of the wide paper strips and the narrow paper strips is 0.323-0.717 g / cm 3 .

[0011] A preparation method of a bearing sound-absorbing multifunctional lightweight rolled paper structure, comprising the following steps:

[0012] (1) cutting paper into wide paper strips and narrow paper strips;

[0013] (2) pasting the narrow paper strips at the bottom of the wide paper strips to form paper strips with one thick side and one thin side;

[0014] (3) starting from one end, curling, and tightly pasting the thick side of the bottom of the wide paper strips, to obtain the bearing sound-absorbing multifunctional lightweight rolled paper structure.

[0015] Compared with the prior art, the present application has at least the following beneficial effects:

[0016] The bearing sound-absorbing multifunctional lightweight rolled paper structure of the present application is formed by interlacing and rolling the wide and narrow paper strips. Since the wide and narrow paper strips are connected at the bottom, a slit is formed between every two layers of the upper layer of the rolled paper, and the size of the slit is equivalent to the width of the bottom paper. When air passes through the slit, the sound wave energy is converted into heat due to the friction between the air and the slit wall. On the other hand, since paper is a porous material, the oscillation of the air in the slit will be more intense due to the absorption of part of the sound wave energy by the internal sound wave, that is, the viscous effect in the slit is enhanced. In terms of mechanics, the buckling and crushing of the inner and outer cylinders are constrained by the adjacent circular tubes due to the interlacing of the multiple layers of paper, so that the mechanical properties are enhanced. Further, the structure is composed of paper, which has a low density and good lightweight characteristics compared with metal materials such as aluminum. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and are used to explain the present application, and do not constitute a limitation on the present application.

[0018] Figure 1 It is a schematic diagram of the bearing sound-absorbing multifunctional lightweight rolled paper structure of the present application;

[0019] Figure 2 It is a single cell profile diagram;

[0020] Figure 3 It is a preparation process diagram;

[0021] Figure 4 It is a diagram of three different curling shapes, wherein (a) is a triangular curling, (b) is a square curling, and (c) is a petal-shaped curling;

[0022] Figure 5 It is a schematic diagram of the sound absorption coefficient of three embodiments of the bearing sound-absorbing multifunctional lightweight rolled paper structure of the present application;

[0023] Figure 6 Fig. 3 is a schematic diagram of a quasi-static compression curve of a third embodiment of the carrying sound-absorbing multifunctional lightweight paper roll structure of the present application;

[0024] 1. wide paper strip; 2. narrow paper strip. DETAILED DESCRIPTION

[0025] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one edge" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the drawings, various structural schematic diagrams according to the disclosed embodiments of the present application are shown. These diagrams are not drawn to scale, in which certain details are exaggerated for the purpose of clear expression, and certain details can be omitted. The shapes of various regions, layers shown in the drawings and their relative size, positional relationship are only exemplary, and in actuality, there can be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can additionally design regions / layers with different shapes, sizes, relative positions according to actual needs.

[0028] The present application provides a carrying sound-absorbing multifunctional lightweight paper roll structure, which uses common paper in daily life, cuts and curls the paper to form certain gaps between the curled paper. The existence of the gaps is beneficial for sound waves to enter the structure and absorb most of the sound wave energy through the friction between the paper surface and the air. Compared with the tightly curled paper structure, the sound absorption performance is greatly improved, and the sound absorption coefficient is greater than 0.8 in a very wide frequency band. And the formed structure has very excellent mechanical carrying capacity.

[0029] Please refer toFigure 1 and Figure 2 A multi-functional lightweight paper roll structure with load-bearing and sound-absorbing functions comprises wide paper strips 1 and narrow paper strips 2, the wide paper strips 1 and the narrow paper strips 2 are wound into several layers and wound in a spiral shape, and air slits are formed between adjacent wide paper strips 1 and narrow paper strips 2.

[0030] Reference Figure 3 A method for preparing a multi-functional lightweight paper roll structure with load-bearing and sound-absorbing functions comprises the following steps:

[0031] (1) Paper is cut into two types of paper strips, wide paper strips 1 and narrow paper strips 2;

[0032] (2) The narrow paper strips 2 are attached to the bottom of the wide paper strips 1 to form paper strips with one thick side and one thin side;

[0033] (3) Starting from one end, winding is performed, and the thick side of the wide paper strip 1 is tightly attached, and the multi-functional lightweight paper roll structure with load-bearing and sound-absorbing functions is obtained.

[0034] The winding shape of the structure is related to the processing method. By continuously folding and bending, different shapes of structures can be prepared according to different engineering requirements to adapt to different application scenarios, especially the irregular space inside vehicles such as cars and trains. Figure 4 As shown in the figure, the cross-sectional shape is circular, triangular, and petal-shaped.

[0035] Example 1

[0036] In this embodiment, the wide paper strips 1 and the narrow paper strips 2 are rice paper, the density is 0.323 g / cm 3 , the height of the wide paper strips is 50 mm, and the width of the narrow paper strips is 10 mm.

[0037] Example 2

[0038] In this embodiment, the wide paper strips 1 and the narrow paper strips 2 are office A4 paper, the density is 0.646 g / cm 3 , the height of the wide paper strips is 50 mm, and the width of the narrow paper strips is 10 mm.

[0039] Example 3

[0040] In this embodiment, the wide paper strips 1 and the narrow paper strips 2 are kraft paper, the density is 0.717 g / cm 3 , the height of the wide paper strips is 50 mm, and the width of the narrow paper strips is 10 mm.

[0041] The control example is a uniform and slit-free paper roll structure with the same thickness as the example. In order to ensure the objectivity of the control, the paper is the same batch as the example.

[0042] The sound absorption coefficients of the examples and the comparative examples are compared as follows by using the above materials and structure sizes to prepare and test the acoustic test.

[0043] The sound absorption coefficients of the structure and the uniform non-slit paper control group between 0 and 6400 Hz are tested.

[0044] Please refer to Figure 5 , wherein the black solid line represents the sound absorption coefficient of the uniform non-slit paper structure, and the black dotted line represents the sound absorption coefficient of the paper structure with slits. As can be seen from the figure, the sound absorption structure proposed in the application has a large increase in the range of 0 to 6400 Hz compared with the uniform non-slit paper structure. The specific performance is as follows:

[0045] The sound absorption coefficient of the paper structure with slits in Example 1 reaches 0.8 or more in the range of 750 to 6400 Hz, and the overall average sound absorption coefficient is 0.91. The average sound absorption coefficient of the non-slit paper structure is 0.4.

[0046] The sound absorption coefficient of the paper structure with slits in Example 2 reaches 0.8 or more in the range of 800 to 6400 Hz, and the overall average sound absorption coefficient is 0.89. The average sound absorption coefficient of the non-slit paper structure is 0.17.

[0047] The sound absorption coefficient of the paper structure with slits in Example 3 reaches 0.8 or more in the range of 800 to 2500 Hz and 3100 to 6400 Hz, and the overall average sound absorption coefficient is 0.8. The average sound absorption coefficient of the non-slit paper structure is 0.25.

[0048] The results show that the sound absorption performance of different types of paper can be greatly improved in a wide frequency range. Among them, the sound absorption bandwidth of the paper in Example 1 is the widest, and the average sound absorption coefficient is the best.

[0049] The stress-displacement curves of the three examples are given by using the above materials and structure sizes to prepare and test the quasi-static compression test, and the comparison is as follows:

[0050] Please refer to Figure 5 , wherein the black dotted line represents the quasi-static compression curve of Example 1, the black dotted line represents the quasi-static compression curve of Example 2, and the black solid line represents the quasi-static compression curve of Example 3. The compression strength of the paper is 0.5 MPa. The compression strength of the A4 paper is 1.8 MPa, and the compression strength of the kraft paper is 5.2 MPa. It is a good bearing material.

[0051] According to the above data, the technical effects achieved by the application are as follows:

[0052] 1、 the test result of the experiment of the present application is that the sound absorption coefficient is above 0.8 in 750~6400 Hz, the average sound absorption coefficient is above 0.85, and the requirement of effective sound absorption in wide frequency band is met;

[0053] 2、 the material used in the structure is paper, which is low in price and easy to obtain;

[0054] 3、 the sound absorption structure is simple and convenient to process;

[0055] 4、 the compression strength of the sound absorption structure has great advantages compared with conventional sound absorption materials;

[0056] 5、 the mechanical and acoustic properties of the overall structure can be changed by changing the structure parameters of the rolled paper and the type of paper, and the requirements in different occasions can be met.

[0057] In summary, the existence of the slit in the rolled paper structure with the functions of bearing, sound absorption and lightweight can greatly improve the sound absorption performance of the paper. There are more adjustable parameters in the design, including structure parameters and paper types, which can be adjusted according to the actual working conditions. The structure is simple and easy to manufacture.

[0058] Finally, it should be pointed out that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A lightweight roll paper structure with multiple functions including load-bearing and sound absorption, characterized in that: It includes wide paper strips (1) and narrow paper strips (2), which are stacked and curled into several layers and spirally curled, with air gaps formed between adjacent wide paper strips (1) and narrow paper strips (2); The wide strip (1) and narrow strip (2) are made of Xuan paper or kraft paper, with a thickness of 0.05 to 0.5 mm; The width of the wide paper strip (1) is 10-100 mm; The width of the narrow paper strip (2) is 1 to 10 mm.

2. The lightweight roll paper structure with multiple functions of load-bearing and sound absorption as described in claim 1, characterized in that: Its cross-sectional shape is circular, triangular, or petal-shaped.

3. The lightweight roll paper structure with multiple functions of load-bearing and sound absorption as described in claim 1, characterized in that: The densities of the wide paper strips (1) and narrow paper strips (2) are 0.323-0.717 g / cm³. 3 .

4. A method for preparing a lightweight, multi-functional roll paper structure with load-bearing and sound-absorbing properties according to any one of claims 1 to 3, characterized in that, Includes the following steps: (i) Cut the paper into two types of strips: wide strips (1) and narrow strips (2); (ii) Attach the narrow strip of paper (2) to the bottom of the wide strip of paper (1) to form a strip of paper that is thick on one side and thin on the other; (iii) Starting from one end, roll the paper tightly with the thicker side of the bottom of the wide paper strip (1) to obtain the paper roll structure with multiple functions of bearing sound absorption and lightweight.

Images