RU2327565C1 - Method of prodiuction of heat-insulating materials - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention may be used during construction of social and industrial purpose buildings with internal noise sources, for the enhancement of acoustic comfort in premises. The claimed method is used for the production of heat-insulating materials by binding two tapes with a fusible layer, which is a milled foamed foil-coated and/or pure foamed polymer, by a device containing a means for the binding of the tapes and the fusible layer: drop rolls, guiding rollers, a fusible layer feeding assembly, a flattening assembly containing guiding sides located along the lower tape and a transverse scraper located above it, the guiding sides and the scraper are installed so as to provide for vertical reciprocal displacement for forming the bulk layer with a given thickness; a heating means (a hot air gun with an adjustable tilt angle), and means for web pressing (heated pressure rolls).

EFFECT: increased sound-insulating capacity of closed honeycomb heat-insulating materials based on foamed polymers.

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Description

The invention relates to construction and can be used in the construction of public and industrial buildings with internal noise sources to improve acoustic comfort in the premises.

Known heat-insulating materials based on fibrous open cellular structures such as glass or mineral wool. As a rule, they are produced by the method of thermal or adhesive bonding of individual fibers into a single structure or by the method of forming granular mineral wool with a starch binder.

Known heat-insulating materials with a closed cellular structure based on foamed polymers: polyethylene, polypropylene, polystyrene, polyurethane, rubber. They are obtained by the method of expanding or foaming the polymer with gases (isobutane, freon, carbon dioxide, etc.), introduced independently or generated during the chemical reaction by mixing various components.

Known soundproofing and heat insulating sandwich panel containing two plates and a layer of porous material between them. The porous material can be thin glass, basalt or nylon fibers, foamed polyurethane. I.I. Bogolyubov. Industrial soundproofing. L .: Shipbuilding, 1986, p. 165, 172.

The disadvantages of this design are low manufacturability, low environmental friendliness, relatively low thermal insulation.

Currently, to ensure satisfactory acoustic conditions in the premises, various sound-absorbing structures are widely used.

A known method of producing a foamed polymer, according to which the reaction components of the mixture are mixed and a blowing agent with a low boiling point, create a pressure sufficient to maintain the blowing agent in a liquid state, and the mixture is passed through a permeable outlet through which the mixture exits.

The pressure in the mixture decreases and a foamed polymer tape forms. Eurasian patent No. 000313, IPC: B01F 5/06, 1999

A known method of connecting two webs using a fusible layer, comprising two webs, a fusible layer, means for jointly connecting the first and second webs with a fusible layer, heating means, means for pressing the webs. International application WO 01/71090 (09/27/2001). Prototype.

The method due to the stationary mounting of the heating means and the lack of heated shafts does not make it possible to obtain heat-insulating materials of different thicknesses and different compositions, to set the properties of the resulting material.

Closed cellular structures have better heat-insulating properties due to the low thermal conductivity of the foaming gases enclosed in the cells. However, the sound absorption capacity of closed cell structures is lower than the sound absorption capacity of open cell structures.

The objective of the invention is to increase the sound insulating ability of closed cellular heat-insulating materials based on foamed polymers.

The technical result of the invention is the disposal of waste products of penofol and similar materials, the possibility of obtaining materials with predetermined sound-noise-heat-insulating properties.

The technical result is achieved by the fact that in the method of manufacturing heat-insulating materials by connecting two tapes using a fusible layer, which is a crushed foamed foil and / or pure polymer, by means of a device containing means intended for joint connection of tapes and a fusible layer - falling shafts, guides rollers, a fusible layer supply unit, a leveling unit containing bead guides located along the lower belt, and a transverse scraper located above it, m guide bead and the scraper are mounted for vertical reciprocating movement to form a predetermined thickness pour layer, heating means - dryer with adjustable inclination, means for pressing webs - heated nip rolls.

The material obtained by thermal fusion of granules of the crushed fraction of foamed polymers with foamed polymer tapes is a sandwich of tapes with a closed cellular structure, between which there is a layer in the form of glued pieces of clean and / or foil foam, which are a homogeneous mixture of closed cellular and open cellular structures.

The invention is illustrated in figures 1-3.

Figure 1 schematically shows a device for producing sound insulating material, where: 1 - crushed fraction (in the hopper), 2 - foam polymer tape, 3 - heated clamping shafts, 4 - guide rollers, 5 - receiving shaft, 6 - feeding shafts, 7 - hair dryer with an adjustable angle of inclination α.

Figure 2 presents an enlarged cross-section of the resulting material, where: 1 - crushed fraction after thermal bonding, 2 - tape of foamed polymer, 8 - layers of aluminum foil.

Figure 3 presents the values of sound insulation in the low frequency region of this product in the form of two layers of 2.5 mm thick foamed polyethylene, between which is a layer of crushed fraction after thermal bonding with a thickness of 5 mm (solid broken line) in comparison with the prototype of two layers of penofol 3.5 mm thick, between which is a sheet of burnt copper (dashed broken line).

The granules of the crushed fraction 1 have sizes from 2 to 10 mm, the thickness of the foamed polymer tape is in the range from 1 to 5 mm, for polyethylene foam the air flow from the hairdryer 7 with an adjustable angle of inclination α has a temperature of 80-90 ° C. The crushed fraction is a crushed foamed foamed and / or pure polymer, for example, crushed defective penofol or other foamed polymer. Thus, there is a complete environmentally friendly disposal of the production of foamed polymers. The crushed fraction 1 is poured with an even layer on the lower foam tape 2. For uniform application of the crushed fraction layer, a leveling assembly (not shown) is provided. The leveling unit contains guide rails located along the lower belt 2, and a transverse scraper located above it. The side rails and the scraper are mounted with the possibility of vertical reciprocating movement to form a predetermined thickness of the bulk layer. The lower and upper foamed polymer ribbons 2 from the supply shafts 6 are fed through guide rollers 4 to the heated pressure rollers 3, passing through which the crushed fraction 1 is sintered with each other and connected to the inner surfaces of the foamed polymer 2 belts. After passing the heated pressure rollers 3, the resulting uniform strip is 10-50 mm with the help of guide rollers 4 is wound on a receiving shaft 5. The finished material is stored in rolls and / or in the form of mats. The technological mode is set by the temperature of the air stream emanating from the dryer 7, the surface temperature of the pressure heated shafts 3, the change in the angle of inclination α, the distances between the surfaces of the pressure heated shafts 3, the speed of the foam polymer tape 2.

By changing these parameters, the predetermined technical characteristics of the obtained material are obtained in advance: density, porosity, thickness, respectively, physical characteristics of thermal conductivity and sound absorption.

Claims (1)

A method of manufacturing heat-insulating materials, by connecting two tapes using a fusible layer, which is a crushed foamed foil and / or pure foamed polymer, by means of a device containing means intended for joint connection of tapes and a fusible layer - falling shafts, guide rollers, fusible feed unit a layer, a leveling assembly comprising bead guides located along the bottom tape and a transverse scraper located above it, the bead guides and the scraper anovleny for vertical reciprocating movement to form a predetermined thickness pour layer, heating means - dryer with adjustable inclination, means for pressing webs - heated nip rolls.

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