SU1481063A1 - Method of producing multilayer sound-proofing material - Google Patents

Abstract

This invention relates to the creation of layered polymeric materials, in particular, materials based on nonwoven structures. In order to increase the sound absorption coefficient, reduce glue consumption and material manufacturing costs, applying glue to the fuzzy layer is carried out by immersing the needles during the direct course of the needle-punching unit into the glue composition, attaching to the substrate is carried out by jointly pulling the material with the substrate between the conveyor rolls. The sound absorption coefficient of the material at frequencies: 500 Hz, 16-175%, 1000 Hz 31-32%, 4000 Hz 55-60%, sound insulation ability in the frequency range 1000-2500 Hz 13-27 dB, consumption of glue 28-36 g / m ² . 4 il. 5 tab.

Description

The invention relates to the creation of layered polymeric materials, in particular materials based on nonwoven structures.

The aim of the invention is to increase the sound absorption coefficient, reduce the consumption of glue and time spent on the manufacture of the material.

FIG. 1 is a diagram of an installation for manufacturing a multilayer material; in fig. 2-4 are layouts for manufacturing a multilayer material.

The fibrous canvas 1 and the additional layer 2 of polyethylene film are guided by the guide rollers 3 to the needle-punching unit 4, the needles of which, after breaking through the fibrous canvas and the additional layer, are dipped into the adhesive composition which is poured into the reservoir 5 installed under the needle-punching unit. During the return stroke, the needles are wiped on the fuzzy layer, wetted with glue. Substrate 9 is pressed against the formed pile-adhesive layer 6 using a guide 7 and clamping 8 rollers. A tensile force P is applied to the polymer film during the direct course of the needle-punching unit. Thus, all three operations: formation of a pile-like layer, applying an adhesive composition and the attachment to the substrate is aligned in time, as they are imposed on the other with a phase shift. This makes it possible to significantly reduce the time spent on the manufacture of the material.

During the direct course of the needle-piercing unit (Fig. 2), the needles 10 pull the fibers 11 of the fibrous canvas 12 through the polymer film 13, to which tensile forces R are applied. The lower part of the needle is immersed in the adhesive mass 14. During the return stroke of the needle-piercing unit ( Fig. 3) tensile forces Pi are removed, the polymer film tends to follow.

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Table 1

Samples of materials

The average geometric frequency of the octave bands, Hz 16 | 31.5 G 63.51 1251 250I 5001 1000J 2000 | 4000J 8000

No samples - 89 88 85 83 79 82 71 68 49 A sample made by a known method, the substrate is aluminum.

foil - 71 75 77 79 73 75 61 42 28

The sample made by the proposed method, the substrate is aluminum foil 51 59 63 68 58 64 45 30 25

Table 2 Samples of materials Average geometric frequency octave bands, Hz

161 31.5 D 63.5 I 125 | 250 | 500 1000 2000 40001 8000

 - - - - ---- 1- -f- -

The sample made in a known manner, the substrate - aluminum

foil-18 13 8 4 6 7 10 16 21

The sample made by the proposed method, the substrate is aluminum foil - 38 29 22 15 11 18 26 38 23

Table 3

Way to dock thickness of sound absorption coefficient on average

the position of the mother frequencies, Hzifrimatisloyev in the material, mm111e koteriale250 500 1000 2000 effects

sound absorption

Known- Fibrous

ny canvas, up to a single layer (polyethylene film), adhesive composition, substrate (metal foil) 12 0.07 0.11 0.14 0.24 0.54 0.18

ShredPodlozhka (metallic foil), adhesive composition, additional layer (plastic film), fibrous fiber

12

0.06 0.13 0.11 0.08

agae-canvas, additional telite layer

(polyethylene film), adhesive composition, substrate (metal foil) Substrate (metal foil), adhesive composition, additional layer (polyethylene film), fibrous canvas

12

12

0.08 0.15 0.33

0.08 0.18 0.17

Lime Offered

Continued table. 3

0.09

0.58

0.29

0.09

0.13

Table 4

3.24 1.07

Strength of tensile deformations in fractions from cTg (tensile strength of polyethylene) 0, Sound absorption coefficient,%, at frequencies, Hz:

2509

50016

100031

200038

400055

600061

Sound insulation ability, dB, in the frequency range, Hz:

1000-2500 14 Consumption of glue, g / m2 50 34

Table 5

0.44

6 10 20 28

41 44

15-26 36

20-37 50

1

;/ 12

R,

Fig 2

P w

I

g

Claims (1)

Claim A method of manufacturing a multilayer soundproofing material by joining a fibrous canvas using a needle punching method with an additional layer of a polyethylene film to form a fleecy layer on it, applying glue to the last one and attaching it to a substrate, characterized in that in order to increase the coefficient of sound absorption, reduce the consumption of glue and spend time on the manufacture of the material, the application of glue, the fluffy layer is carried out using the needles of the punching unit by immersing them in the adhesive composition in a direct course, and stronger to the substrate is carried out by pulling between the rollers of the conveyor. 5 6 Table 1 Material samples Geometrical mean frequencies of octave bands, Hz 16 | 31.5 63.5 | 125 250 500 1000 2000 4000 8000 No samples - 89 88 85 83 79 82 71 68 49 Sample made in known manner, substrate - aluminum foil 71 75 77 79 73 75 61 42 28 A sample made by the proposed method, the substrate is aluminum foil 51 59 63 68 58 64 45 thirty <25 table 2 Material samples Geometrical mean frequencies of octave bands, Hz 16 31.5 63.5 125 250 500 1000 2000 4000 8000 A sample made in a known manner, the substrate is aluminum foil 18 thirteen 8 4 6 7 10 16 21 A sample made by the proposed method, the substrate is aluminum foil 38 29th 22 fifteen eleven 18 26 38 > 23 Table 3 Way The order of Thickness Sound absorption coefficient on Average provisions mother frequencies, Hz arithmetic layers in ala, mm cskoe teriale 250 500 1000 2000 effector soundproof squash Famous- Fiber canvas, additional layer (plastic film), adhesive, backing (metal foil) 12 0.07 0.11 0.24 0.54 0.18 Continuation of the table. 3 Syosob The arrangement of spruces in the material Material Thickness, mm Sound absorption coefficient at frequencies, Hz 250 500 1000 2000 Arithmetic mean of sound absorption coefficient Proposed Substrate (metal foil), adhesive, extra layer (plastic film), fibrous canvas 0.06 0, 13 0, 1 1 0.08 0.09 canvas, additional layer (plastic film), adhesive, backing (metal foil) Substrate (metal foil), adhesive, additional layer (plastic film), fibrous 0.08 0.15 0.33 0.58 0.29 canvas 0.08 0, 18 0.17 0.09 0.13 Table 4 The method of Consumption Time costs tovleniya glue meni, min / m ² material g / dm ² Famous 0.82 3.24 Offered 0.61 1.07 Table 5 Properties The proposed method known The tensile strain forces in fractions of (¾ (tensile strength of polyethylene under tension genius) Sound absorption coefficient,%, at frequencies, Hz: 0 32 0.38 0 44 250 9 10 9 6 500 16 17 16 10 1000 31 32 32 20 2000 38 40 44 28 4000 55 57 60 41 6000 61 62 65 44 Sound insulation ability, dB, in the range, frequencies, Hz: 1000-2500 14- -27 13-25 fifteen· -26 20-37 Glue consumption, g / m ² 50 34 28 36 fifty FIG. 1 FIG. 2 Compiled by N. Koshelev Editor I. Shulla Order 2621/15 Tehred I. Veres Corrector A. Obruchar Circulation 520 Subscription VNIIIPI State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant "Patent", Uzhgorod, Ch ^.: 'Agzein.2,' .Zh