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CN111267410A - Composite insulation board for external insulation of building external wall and preparation method thereof - Google Patents

Composite insulation board for external insulation of building external wall and preparation method thereof Download PDF

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Publication number
CN111267410A
CN111267410A CN202010091825.4A CN202010091825A CN111267410A CN 111267410 A CN111267410 A CN 111267410A CN 202010091825 A CN202010091825 A CN 202010091825A CN 111267410 A CN111267410 A CN 111267410A
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China
Prior art keywords
board
polyurethane
glass wool
composite insulation
layer
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Pending
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CN202010091825.4A
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Chinese (zh)
Inventor
路国忠
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Beijing Building Materials Academy of Sciences Research
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Beijing Building Materials Academy of Sciences Research
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Priority to CN202010091825.4A priority Critical patent/CN111267410A/en
Publication of CN111267410A publication Critical patent/CN111267410A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/762—Exterior insulation of exterior walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/942—Building elements specially adapted therefor slab-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a composite insulation board for external insulation of a building outer wall and a preparation method thereof, and the composite insulation board comprises the following steps of firstly coating a flame-retardant polyurethane adhesive on the lower surface of a glass wool board, then pasting a cement glass wool felt, then conveying the glass wool board pasted with the cement glass wool felt into a laminating conveyor of a polyurethane board continuous production line, simultaneously starting mixed pouring of a polyurethane black material and a polyurethane white material on the upper surface of the glass wool board, gradually foaming and forming a polyurethane mixture on the surface of the glass wool board, bonding the polyurethane board and the upper layer of the cement glass wool felt into a whole by utilizing the self bonding property of the polyurethane board, and finally curing and cutting the product to obtain the composite insulation board of polyurethane and glass wool. The composite insulation board for building external wall external insulation prepared by the process integrates safety fire prevention and energy-saving insulation, and the glass wool and polyurethane composite insulation board for building external wall external insulation has good mechanical property and waterproof property.

Description

Composite insulation board for external insulation of building external wall and preparation method thereof
Technical Field
The invention relates to the production field of thermal insulation materials for external thermal insulation of building external walls, in particular to a composite thermal insulation board for external thermal insulation of building external walls and a preparation method thereof.
Background
The active development of novel building materials with both fireproof and heat-insulating properties has always been an important development direction in the field of novel building materials. Under the large background that the safety and fire-proof performance of building heat-insulating materials are more and more emphasized and the demand of energy conservation and emission reduction in China is urgent, the development of novel building materials integrating fire prevention and heat insulation into a whole also becomes an urgent task of the building heat-insulating industry. The polyurethane belongs to organic porous heat-insulating materials, is considered to be the best organic heat-insulating material in performance in the world at present, has the combustion performance of B level, low heat conductivity coefficient and obvious energy-saving effect; the closed pore rate is low, and the waterproof performance is good; the polyurethane material is also a strong polar material which is less in organic heat insulation materials, and the bonding performance is good. The glass wool belongs to inorganic heat-insulating materials, has A-grade combustion performance, is not harmful to fire, is non-toxic and harmless, has good durability, and is one of A-grade heat-insulating materials with better heat-insulating performance, which are widely applied in China. The organic polyurethane heat-insulating material has low heat conductivity coefficient and good energy-saving effect, but has unsatisfactory combustion performance, and even generates toxic and harmful substances when burning in fire; the inorganic glass wool type heat insulation material has good combustion performance and is non-combustible when meeting fire, compared with organic heat insulation materials, the inorganic glass wool type heat insulation material has high heat conductivity coefficient, poor energy-saving effect, easy water absorption, poor mechanical property and low tensile strength, and the heat insulation effect is seriously influenced after being wetted, and the safety performance of the inorganic glass wool type heat insulation material is worried about after being put on a wall. If the two materials can be effectively combined, the respective characteristics of fire prevention and heat preservation are fully exerted, and the development of a novel heat-preservation material integrating fire prevention and heat preservation can provide a new idea for the development of heat-preservation materials outside the outer wall of China.
The glass wool and polyurethane composite insulation board combines a polyurethane board with good energy-saving effect and a glass wool board with good combustion performance, fully exerts the advantages of fire prevention and heat preservation of two insulation materials, and enables the novel insulation composite board to have good mechanical property and waterproof property. The problem of present insulation material fire prevention not keep warm, keep warm not fire prevention's dilemma is solved.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a composite insulation board for external thermal insulation of an external wall of a building and a preparation method thereof. The invention provides a preparation process of a glass wool and polyurethane composite insulation board for building external wall external insulation, which integrates safety fire prevention and energy-saving insulation and has good mechanical property and waterproof property.
The invention aims to provide a preparation method of a composite insulation board for external insulation of a building outer wall, which comprises the following steps of coating a flame-retardant polyurethane adhesive on the lower surface of a glass cotton board, then pasting a cement glass fiber felt, then conveying the glass cotton board pasted with the cement glass fiber felt into a laminating conveyor of a continuous production line of the polyurethane board, simultaneously starting mixed pouring of a polyurethane black material and a polyurethane white material on the upper surface of the glass cotton board, gradually foaming and forming a polyurethane mixture on the surface of the glass cotton board, bonding the polyurethane board and the upper cement glass fiber felt into a whole by utilizing the bonding performance of the polyurethane board, and finally curing and cutting the product to obtain the composite insulation board of polyurethane and glass cotton.
In the invention, the polyurethane board layer is connected with the cement glass fiber felt layer through the self adhesive force in the polyurethane foaming process, and the glass wool board layer is connected with the cement glass fiber felt layer through the flame-retardant polyurethane adhesive layer.
According to some preferred embodiments of the present invention, the ratio of the polyurethane black material to the polyurethane white material is 1.5:1 to 1.9: 1.
According to some preferred embodiments of the invention, the temperature of the co-casting is 65 ℃ to 75 ℃.
According to some preferred embodiments of the present invention, the lamination conveying speed is 3.5 to 4.5 m/min.
According to some preferred embodiments of the invention, the glass wool sheet has a thickness of 50 mm. In the invention, the thickness of the glass cotton board layer is not changed, the preferable thickness has good effect, and only the thickness of the polyurethane board layer is adjusted according to the energy-saving standard requirements of different areas and projects.
According to some preferred embodiments of the present invention, the ratio of the amount of the polyurethane black material to the amount of the polyurethane white material is 1.7: 1; the casting temperature is 70 ℃; the lamination conveying speed was 4 m/min.
According to some preferred embodiments of the invention, the method comprises the following steps of firstly coating a flame-retardant polyurethane adhesive on the lower surface of a glass wool board, then pasting a cement glass wool felt, then conveying the glass wool board pasted with the cement glass wool felt to a laminating conveyor of a polyurethane board continuous production line through a roller shaft conveying system, wherein the temperature of the laminating conveyor is 70 ℃, the speed of the laminating conveyor is 4m/min, simultaneously, the mixing and pouring of polyurethane black and white materials are started on the upper surface of the glass wool board, the ratio of the black and white materials is 1.7:1, as a chain plate machine moves forwards, the polyurethane mixture is gradually foamed and formed on the surface of the glass wool board, and is bonded with the upper cement glass wool felt into a whole by utilizing the self-bonding performance of the polyurethane board, and finally, the polyurethane and glass wool composite insulation board is produced after the product is cured and cut. The polyurethane board layer is connected with the cement glass fiber felt layer through self adhesive force in the polyurethane foaming process, and the glass wool board layer is connected with the cement glass fiber felt layer through the flame-retardant polyurethane adhesive layer.
The invention also aims to provide the composite insulation board for the external thermal insulation of the building external wall, which is prepared by the preparation method, and comprises a cement glass fiber felt layer 1, a glass cotton board layer 3, a polyurethane board layer 4 and a flame-retardant polyurethane adhesive layer 2, wherein the polyurethane board layer 4 is connected with the cement glass fiber felt layer 1, and the glass cotton board layer 3 is connected with the cement glass fiber felt layer 1 through the flame-retardant polyurethane adhesive layer 2.
According to some preferred embodiments of the invention, the oxygen index of the flame-retardant polyurethane adhesive layer used for gluing is more than or equal to 30%, preferably 32-35%; the tensile bonding strength is not less than 100kPa, and preferably 120-130 kPa.
According to some preferred embodiments of the present invention, the glass wool panel is a pleated glass wool panel; pleating ratio of the pleated glass wool panel3, the tensile strength in the direction vertical to the plate surface is more than or equal to 13kPa, the heat conductivity coefficient at 25 ℃ is less than or equal to 0.035W/m.K, and the apparent density is more than or equal to 100kg/m3Other performance indexes meet the requirements of GB/T13350 and 2017 glass wool for heat insulation and products thereof.
According to some preferred embodiments of the present invention, the apparent density of the polyurethane sheet layer is 45 to 55kg/m3Preferably 50kg/m3The thickness is 40-120 mm, the specific thickness is determined according to the energy-saving standard requirements of different regions and projects, the heat conductivity coefficient (25 ℃) is less than or equal to 0.024W/m.K, the tensile strength perpendicular to the plate surface direction is greater than or equal to 0.12MPa, the combustion performance is B1 grade, the oxygen index is greater than or equal to 30 percent, and other performance indexes meet the requirements of polyurethane hard foam composite insulation board JG/T314 + 2012.
According to some preferred embodiments of the invention, the tensile bonding strength of the composite insulation board is more than or equal to 13kPa, the compressive strength (deformation 10%) is more than or equal to 40kPa, and the short-term water absorption (partial immersion, 24h) is less than or equal to 0.5kg/m2The mass moisture absorption rate is less than or equal to 1.0 percent.
The invention has the beneficial effects that: the invention provides a plate for external thermal insulation of an external wall, which integrates safe fire prevention and energy-saving thermal insulation, and compared with common glass wool, the plate can greatly improve the waterproof performance and the thermal insulation performance, avoid the performance reduction of the glass wool caused by moisture absorption, and reduce the thermal conductivity coefficient from 0.038W/(m.K) to 0.035W/(m.K). Compared with the common polyurethane board, the fireproof performance of the invention can be greatly improved, and the fireproof performance can be improved from the original B2 grade to the B1 grade or the composite A grade.
Drawings
FIG. 1 is a schematic structural view of a composite insulation board provided by the present invention;
in the figure, 1-cement glass fiber felt layer; 2-flame retardant polyurethane adhesive layer; 3-a glass wool ply; 4-polyurethane board layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. The technical solution of the present invention is not limited to the following specific embodiments, and includes any combination of the specific embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the present invention, the specific techniques or conditions not specified in the examples are performed according to the techniques or conditions described in the literature in the art or according to the product specification. The instruments and the like are conventional products which are purchased by normal distributors and are not indicated by manufacturers. The raw materials used in the following examples of the present invention are all available in domestic markets. In the following examples, the glass wool of the present invention is a pleated glass wool board, i.e., a thermal insulation board obtained by pleating glass wool fibers with a pleating machine and then pressing the pleated glass wool fibers with a curing oven, wherein the pleating ratio of the pleated glass wool board is 3, the tensile strength in the direction perpendicular to the board surface is not less than 13kPa, the thermal conductivity (25 ℃) is not more than 0.035 (W/m.K), and the apparent density is not less than 100kg/m3Other performance indexes meet the requirements of glass wool for heat insulation and products thereof GB/T13350-2017.
Example 1
As shown in fig. 1, in the composite insulation board of the embodiment, the polyurethane board layer 4 is connected with the cement glass fiber felt layer 1, and the glass wool board layer 3 is connected with the cement glass fiber felt layer 1 through the flame-retardant polyurethane adhesive layer 2. The preparation process of the glass wool and polyurethane composite insulation board for external insulation of the building outer wall comprises the following steps: adding flame-retardant polyurethane adhesive into a glue spreader, conveying the prepared pleated glass wool board to the upper part of the glue spreader through a roller shaft, arranging a continuously rotatable roller in the glue spreader, when the pleated glass wool board passes through the roller, the glued pleated glass wool board is then transported by a roller conveyor system to a laminating conveyor of a continuous polyurethane board production line, the glued pleating glass wool board is adhered with the lower cement glass fiber felt layer laid in the laminating machine, simultaneously, pouring of polyurethane black material and white material is started on the upper surface of the pleated glass wool board, and the polyurethane mixture is gradually foamed and formed on the surface of the pleated glass wool board along with the forward operation of the chain plate machine, and the self adhesive property of polyurethane is utilized to be respectively bonded with the upper cement glass fiber cloth and the lower pleated glass wool board into a whole, and finally, the product is cured and cut to produce the glass wool and polyurethane composite insulation board for external insulation of the building external wall. The temperature of a laminating conveyor is kept between 65 ℃ and 75 ℃ in the polyurethane casting process, the ratio of polyurethane black materials to polyurethane white materials is controlled to be between 1.5:1 and 1.9:1, and the running speed of a chain plate of the laminating conveyor is controlled to be between 3.5m/min and 4.5m/min, so that the uniform polyurethane foaming and good bonding strength are ensured.
Example 2
The specific implementation manner of the preparation process of the glass wool and polyurethane composite insulation board of the embodiment is as follows:
adding flame-retardant polyurethane adhesive into a glue spreader, conveying the prepared pleated glass wool board to the upper part of the glue spreader through a roller shaft, arranging a continuously rotatable roller in the glue spreader, when the pleated glass wool board passes through the roller, the glued pleated glass wool board is then transported by a roller conveyor system to a laminating conveyor of a continuous polyurethane board production line, the glued pleating glass wool board is adhered with the lower cement glass fiber felt layer laid in the laminating machine, simultaneously, pouring of polyurethane black material and white material is started on the upper surface of the pleated glass wool board, and the polyurethane mixture is gradually foamed and formed on the surface of the pleated glass wool board along with the forward operation of the chain plate machine, and the self adhesive property of polyurethane is utilized to be respectively bonded with the upper cement glass fiber cloth and the lower pleated glass wool board into a whole, and finally, the product is cured and cut to produce the glass wool and polyurethane composite insulation board for external insulation of the building external wall. The temperature of the laminating conveyor is kept at 70 ℃ in the polyurethane casting process, the ratio of polyurethane black materials to polyurethane white materials is controlled to be 1.7:1, and the running speed of a chain plate of the laminating conveyor is controlled to be 4m/min, so that the polyurethane is foamed uniformly and the bonding strength is good.
In this embodiment, the glass wool board layer 3 has a tensile strength of 15kPa in the direction perpendicular to the board surface, a thermal conductivity (25 ℃) of 0.033(W/m · K), and other performance indexes satisfying the requirements of "glass wool for thermal insulation and products thereof" GB/T13350-2017 ".
By way of example of the inventionIn comparison, the apparent density of the prepared polyurethane plate layer 4 was 50kg/m3The heat conductivity coefficient (25 ℃) is 0.022W/(m.K), the tensile strength perpendicular to the plate surface direction is 0.15MPa, the combustion performance is B1 grade, the oxygen index is 33%, other performance indexes meet the requirements of polyurethane rigid foam composite insulation board JG/T314-. The prepared composite insulation board has the tensile bonding strength of 15kPa, the compressive strength (deformation 10%) of 60kPa and the short-term water absorption (partial immersion, 24h) of 0.2kg/m2The mass moisture absorption rate was 0.3%.
Example 3
The specific implementation manner of the preparation process of the glass wool and polyurethane composite insulation board of the embodiment is as follows:
adding flame-retardant polyurethane adhesive into a glue spreader, conveying the prepared pleated glass wool board to the upper part of the glue spreader through a roller shaft, arranging a continuously rotatable roller in the glue spreader, when the pleated glass wool board passes through the roller, the glued pleated glass wool board is then transported by a roller conveyor system to a laminating conveyor of a continuous polyurethane board production line, the glued pleating glass wool board is adhered with the lower cement glass fiber felt layer laid in the laminating machine, simultaneously, pouring of polyurethane black material and white material is started on the upper surface of the pleated glass wool board, and the polyurethane mixture is gradually foamed and formed on the surface of the pleated glass wool board along with the forward operation of the chain plate machine, and the self adhesive property of polyurethane is utilized to be respectively bonded with the upper cement glass fiber cloth and the lower pleated glass wool board into a whole, and finally, the product is cured and cut to produce the glass wool and polyurethane composite insulation board for external insulation of the building external wall. The temperature of the laminating conveyor is kept at 65 ℃ in the polyurethane casting process, the ratio of the black polyurethane material to the white polyurethane material is controlled to be 1.5:1, and the running speed of a chain plate of the laminating conveyor is 3.5m/min, so that the uniform polyurethane foaming and good bonding strength are ensured.
In this example, the performance index of the glass wool panel layer 3 used was the same as that of example 2.
The apparent density of the prepared polyurethane plate layer 4 is 45kg/m3The thermal conductivity (25 ℃) is 0.021W/(m.K) and is vertical to the plateThe tensile strength in the surface direction is 0.12MPa, the combustion performance is B1 grade, the oxygen index is 30 percent, and other performance indexes meet the requirements of JG/T314-wall 2012, polyurethane rigid foam composite insulation board.
The prepared composite insulation board has the tensile bonding strength of 13kPa, the compressive strength (deformation 10%) of 40kPa and the short-term water absorption (partial immersion, 24h) of 0.5kg/m2The mass moisture absorption rate was 1.0%.
By comparison of the examples of the invention, the proportion of the polyurethane black material and the polyurethane white material is reduced, and the indexes of apparent density, heat conductivity coefficient, tensile strength in the direction vertical to the plate surface, combustion performance, oxygen index and the like are slightly reduced. The temperature of the laminating conveyor and the proportion of the polyurethane black material to the white material are reduced, all performance indexes of the composite board meet the requirements, but the tensile strength and the compressive strength are reduced, and the short-term water absorption capacity and the mass moisture absorption rate are increased; because the temperature of the laminating conveyor is reduced, the curing time of polyurethane is prolonged, the running speed of the chain plate is reduced, and the yield of the composite plate is reduced.
Example 4
The specific implementation manner of the preparation process of the glass wool and polyurethane composite insulation board of the embodiment is as follows:
adding flame-retardant polyurethane adhesive into a glue spreader, conveying the prepared pleated glass wool board to the upper part of the glue spreader through a roller shaft, arranging a continuously rotatable roller in the glue spreader, when the pleated glass wool board passes through the roller, the glued pleated glass wool board is then transported by a roller conveyor system to a laminating conveyor of a continuous polyurethane board production line, the glued pleating glass wool board is adhered with the lower cement glass fiber felt layer laid in the laminating machine, simultaneously, pouring of polyurethane black material and white material is started on the upper surface of the pleated glass wool board, and the polyurethane mixture is gradually foamed and formed on the surface of the pleated glass wool board along with the forward operation of the chain plate machine, and the self adhesive property of polyurethane is utilized to be respectively bonded with the upper cement glass fiber cloth and the lower pleated glass wool board into a whole, and finally, the product is cured and cut to produce the glass wool and polyurethane composite insulation board for external insulation of the building external wall. The temperature of a laminating conveyor is kept at 75 ℃ in the polyurethane casting process, the ratio of polyurethane black materials to polyurethane white materials is controlled to be 1.9:1, and the running speed of a chain plate of the laminating conveyor is 4.5m/min, so that the uniform polyurethane foaming and good bonding strength are ensured.
In this example, the performance index of the glass wool panel layer 3 used was the same as that of example 2.
The apparent density of the prepared polyurethane plate layer 4 was 55kg/m3The heat conductivity coefficient (25 ℃) is 0.024W/(m.K), the tensile strength perpendicular to the plate surface direction is 0.17MPa, the combustion performance is B1 grade, the oxygen index is 34 percent, and other performance indexes meet the requirements of polyurethane rigid foam composite insulation board JG/T314-.
The prepared composite insulation board has the tensile bonding strength of 16kPa, the compressive strength (deformation 10%) of 65kPa and the short-term water absorption (partial immersion, 24h) of 0.4kg/m2The mass moisture absorption rate was 0.5%.
By comparison of the examples of the invention, the proportion of the polyurethane black material and the polyurethane white material is increased, the indexes such as apparent density, tensile strength perpendicular to the plate surface direction, combustion performance, oxygen index and the like are slightly improved and are not obviously increased, the heat conductivity coefficient is increased therewith, and the heat insulation performance is also slightly reduced; in addition, the black material is more expensive than the white material by 15%, so that the cost of the composite board is increased by about 8%. The temperature of the laminating conveyor is increased, the polyurethane curing speed is increased, the running speed of the chain plate is increased, the yield of the composite plate is increased, but the comprehensive cost of the composite plate of the embodiment is increased by about 5%.
The invention provides a preparation process of a glass wool and polyurethane composite insulation board, which is characterized in that a pleated glass wool board conveying system and a glue spreader are added on the basis of the original polyurethane production line, and the produced pleated glass wool board and polyurethane are compounded, cast and molded together to form the composite insulation board integrating safety, fire prevention, energy conservation and heat preservation. The glass wool and polyurethane composite insulation board has good fireproof performance of glass wool and excellent insulation performance of a polyurethane board, and can improve mechanical performance and waterproof performance of the board, so that the insulation board outside the outer wall of a building can achieve the aims of fire prevention and heat insulation at the same time.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A preparation method of a composite insulation board for external insulation of a building outer wall is characterized by comprising the following steps of coating a flame-retardant polyurethane adhesive on the lower surface of a glass cotton board, then pasting a cement glass fiber felt, then conveying the glass cotton board pasted with the cement glass fiber felt into a laminating conveyor of a polyurethane board continuous production line, simultaneously starting mixed pouring of a polyurethane black material and a polyurethane white material on the upper surface of the glass cotton board, gradually foaming and molding a polyurethane mixture on the surface of the glass cotton board, bonding the polyurethane board and the upper layer of the cement glass fiber felt into a whole by utilizing the self bonding performance of the polyurethane board, and finally curing and cutting the product to obtain the composite insulation board of polyurethane and glass cotton.
2. The preparation method according to claim 1, wherein the ratio of the polyurethane black material to the polyurethane white material is 1.5: 1-1.9: 1.
3. The method of claim 1, wherein the temperature of the co-casting is 65 ℃ to 75 ℃.
4. The production method according to any one of claims 1 to 3, wherein the speed of the lamination conveyance is 3.5 to 4.5 m/min.
5. The production method according to any one of claims 1 to 4, wherein the glass wool sheet has a thickness of 50 mm.
6. The preparation method according to any one of claims 1 to 5, characterized in that the ratio of the used amount of the polyurethane black material to the used amount of the polyurethane white material is 1.7: 1; the casting temperature is 70 ℃; the lamination conveying speed was 4 m/min.
7. The composite insulation board for the external thermal insulation of the building external wall, which is prepared according to the preparation method of any one of claims 1 to 6, comprises a cement glass fiber felt layer (1), a glass cotton board layer (3), a polyurethane board layer (4) and a flame-retardant polyurethane adhesive layer (2), wherein the polyurethane board layer (4) is connected with the cement glass fiber felt layer (1), and the glass cotton board layer (3) is connected with the cement glass fiber felt layer (1) through the flame-retardant polyurethane adhesive layer (2).
8. The composite insulation board according to claim 7, wherein the coating is made of flame-retardant polyurethane adhesive, and the oxygen index of the flame-retardant polyurethane adhesive layer is not less than 30%, preferably 32-35%; the tensile bonding strength is not less than 100kPa, and preferably 120-130 kPa.
9. The composite insulation board according to claim 7 or 8, wherein the glass wool board is a pleated glass wool board; the pleating ratio of the pleated glass wool board is 3, the tensile strength in the direction vertical to the board surface is more than or equal to 13kPa, the heat conductivity coefficient at 25 ℃ is less than or equal to 0.035W/m.K, and the apparent density is more than or equal to 100kg/m3。
10. The composite insulation board according to claim 7 or 8, wherein the apparent density of the polyurethane board layer is 45-55 kg/m3Preferably 50kg/m3The thickness is 40-120 mm, the heat conductivity coefficient is less than or equal to 0.024W/m.K, the tensile strength perpendicular to the plate surface direction is more than or equal to 0.12MPa, the combustion performance is B1 grade, and the oxygen index is more than or equal to 30 percent; the tensile bonding strength of the composite insulation board is more than or equal to 13kPa, the compression strength is more than or equal to 40kPa, and the short-term water absorption capacity is less than or equal to 0.5kg/m2The mass moisture absorption rate is less than or equal to 1.0 percent.
CN202010091825.4A 2020-02-13 2020-02-13 Composite insulation board for external insulation of building external wall and preparation method thereof Pending CN111267410A (en)

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CN114541681A (en) * 2022-01-10 2022-05-27 北京建筑材料检验研究院有限公司 Preparation method and application of glass wool composite heat-insulation and decoration integrated plate

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CN106836535A (en) * 2017-03-23 2017-06-13 赵泊然 A kind of external wall insulation and its installation method
CN108948324A (en) * 2018-06-29 2018-12-07 南京红宝丽新材料有限公司 A kind of electrothemic floor insulation board and preparation method thereof
CN109130377A (en) * 2018-08-22 2019-01-04 北京建筑材料科学研究总院有限公司 A kind of sewing block of glass wool and the composite exterior wall insulating board of hard-foam polyurethane and preparation method thereof

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CN113320242A (en) * 2021-06-22 2021-08-31 山东伟瑞制冷科技有限公司 Heat-insulating energy-saving decorative aluminum plate for building exterior wall and production process thereof
CN114541681A (en) * 2022-01-10 2022-05-27 北京建筑材料检验研究院有限公司 Preparation method and application of glass wool composite heat-insulation and decoration integrated plate

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