CN102717579B - Method utilizing expanded perlite to produce vacuum insulated plate - Google Patents

Abstract

A method for producing a vacuum insulation board by using expanded perlite. The steps of the manufacturing process are: batching: put the materials into a mixer for thorough mixing; drying: dry the evenly stirred mixture; forming the core material: put The dried material and getter are put into the mold, and the mold is put into the pressing machine to form it under pressure; wrapping: take the pressed core board out of the mold, and wrap a layer of non-woven fabric around the core board, That is, the core board of the vacuum insulation board for building is obtained; the core board is placed in a high-barrier gas film bag for vacuuming, and the vacuum degree is 0.02-20Pa, and then sealed. The advantages of the invention are: expanded perlite has good sound absorption and low thermal conductivity. The traditional thermal insulation board uses organic foam or rock wool, which is flammable or has a high thermal conductivity. The developed perlite is the main component of the thermal insulation board. The board can achieve a low thermal conductivity, and it is an inorganic material, which is not easy to burn.

Description

Method for producing vacuum insulation panels using expanded perlite

technical field

The invention relates to a method for producing a vacuum heat insulation board by using expanded perlite, which is used for producing a vacuum heat insulation board, and the vacuum heat insulation board is used as a building or industrial heat preservation material.

Background technique

Existing vacuum insulation panels are mainly composed of internal heat-insulating core material and outer high-barrier film, in which the heat-insulation core material is generally made of conventional thermal insulation materials (such as foamed plastics), glass fiber or/and airgel, etc. Its disadvantages are high material cost, high energy consumption and not environmental protection.

Contents of the invention

The present invention aims to provide a method for producing vacuum insulation panels by using expanded perlite, so as to solve the problems of high material cost, high energy consumption and environmental protection in the prior art. the

The technical solution of the present invention is: a method for producing a vacuum insulation panel by using expanded perlite. The core material is put into a high-resistance gas film bag, and sealed after vacuuming. It is characterized in that the core material composition and parts by weight The number is: expanded perlite 60-90, fiber 10-20, vacuum active stabilizer 3-6;

The manufacturing process includes the following steps:

(1) Ingredients: put the materials into the mixer for full mixing;

(2) Drying: Dry the evenly stirred mixture;

(3) Core molding: Put the dried material into the mold and scrape the surface;

(4) Compression molding: Put the mold into the pressing machine and press molding;

(5) Wrapping: Take out the pressed core board from the mold, and wrap a layer of non-woven fabric around the core board to get the insulation core board;

(6) Put the insulation core board into the high-resistance air film bag to vacuumize, the vacuum degree is 0.02-20Pa, and then

seal.

The drying temperature in step (2) is 100-120°C. During the drying process, measure the moisture content of the mixture every 8 minutes until the moisture content of the mixture reaches below 0.5%, and then stop drying.

In step (4), the descending speed of the pressing machine is controlled at 3-7 cm/s, and the pressure is controlled at 20-80 T/m ² .

The drying process of step (2) is carried out simultaneously during the process of step (1).

The non-woven fabric used in step (5) is a flame-retardant non-woven fabric with a mass per unit area of 35-100 g/m ² .

The fibers include more than one of rock wool, glass fibers, lignin fibers and glass ceramic fibers mixed in any proportion, the length of the fibers is 3-12 mm, and the diameter is 0.2-13 microns.

The high-barrier gas film bag is composed of an outer protective layer and an inner sealing layer.

The sealing layer includes aluminum foil, polyester film, nylon film, polyethylene film, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polyethylene One or more of alcohol film, nylon film, ethylene/vinyl alcohol copolymer film, polycarbonate film, polypropylene; the outermost protective layer of the high resistance air film bag is made of glass fiber cloth, no One or more composites of woven fabrics, carbon fiber woven fabrics, basalt fiber fabrics, and ceramic fiber fabrics. the

Both ends of the high-barrier air-resistance film bag are provided with edge seals, which are arranged on the opposite side of the two ends of the high-barrier air-barrier film bag, and on the other side opposite to the edge seal. Anastomotic occlusal groove.

The advantages of the invention are: the vacuum insulation board with perlite as the main component of the core material can achieve low thermal conductivity, is an inorganic material, is not easy to burn, and can meet the needs of the National Sixth Five-Year Energy Saving Plan. The price of raw materials is low, which ensures a certain low thermal conductivity, reduces the cost of raw materials, and reduces the pollution to the environment. The mixing of fiber and perlite increases the strength of the insulation board, and can form an insulation layer between the particles of perlite, further improving the insulation performance.

Description of drawings

Fig. 1 is a side structure schematic diagram of an embodiment of the present invention;

Fig. 2 is a schematic view of the side structure of another embodiment of the present invention;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is a schematic diagram of docking when the present invention is applied.

Detailed ways

The invention discloses a method for producing a vacuum insulation panel by using expanded perlite. The core material is put into a high-barrier gas film bag and sealed after vacuuming. It is characterized in that the composition and parts by weight of the core material are: expanded pearl Rock 60-90, fiber 10-20, vacuum active stabilizer 3-6. The vacuum active stabilizer is composed of one or more mixtures (in any proportion) of activated carbon, barium-lithium alloy activator, calcium oxide, magnesium oxide, and silica gel. The fibers include one of rock wool, glass fiber, lignin fiber and glass ceramic fiber, or two or more of the above fibers mixed in any proportion. The fiber length is 3-12 mm, and the diameter is 0.2-13 microns.

The manufacturing process includes the following steps:

(1) Ingredients: put the materials into the mixer for full mixing;

(2) Drying: Dry the evenly stirred mixture; the drying temperature is 100-120°C, and measure the moisture content of the mixture every 8 minutes during the drying process until the moisture content of the mixture reaches 0.5% Next, stop drying.

(3) Core molding: Put the dried material into the mold and scrape the surface;

(4) Compression molding: put the mold into a press machine and press it; the descending speed of the press machine is controlled at 3-7 cm/s, and the pressure is controlled at 20-80T/m ² .

(5) Wrapping: Take out the pressed core board from the mold, and wrap a layer of non-woven fabric around the core board to obtain a thermal insulation core board; the non-woven fabric used is a flame-retardant non-woven fabric with a mass per unit area of 35 -100g/m ² .

(6) Put the insulation core board into the high-resistance air film bag to vacuumize, the vacuum degree is 0.02-20Pa, and then

seal.

The drying process of step (2) can also be carried out simultaneously during the process of step (1).

The high-barrier gas film bag is composed of an outer protective layer and an inner sealing layer.

The sealing layer includes aluminum foil, polyester film, nylon film, polyethylene film, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polyethylene Alcohol film, nylon film, ethylene/vinyl alcohol copolymer film, polycarbonate film, polypropylene film or more than one compound.

The outermost protective layer of the high-barrier gas film bag is composed of one or more of glass fiber cloth, non-woven fabric, carbon fiber woven cloth, basalt fiber cloth, and ceramic fiber cloth. the

The high gas barrier film bag can also be made of any conventional material. The getter is also a conventional material, and is arranged on the surface of the core plate in a dispersed arrangement or in a layered structure.

Referring to Fig. 1-Fig. 4, the outer structure of the vacuum insulation panel made by the present invention can be a conventional shape, and the two ends of the high gas barrier film bag 1 are provided with sealing edges 3 (see Fig. 1). It is also possible to set the sealing edge 3 at both ends of the high-barrier gas film bag 1 on the opposite side of the two ends of the high-barrier gas film bag 1, and the other side opposite to the sealing edge 3 is provided with a occlusal groove matching the edge sealing 4. During construction, two adjacent insulation boards A1 and A2 are placed in the occlusal groove 4 of the other side (as shown in Figure 4), which reduces the thickness of the thermal bridge between the two adjacent insulation boards and improves Improve the insulation effect and construction efficiency.

Claims (6)

1. A method of utilizing expanded perlite to produce a vacuum insulation panel. The core material is packed into a high-barrier gas film bag and sealed after vacuuming. It is characterized in that the core material composition and parts by weight are: expanded pearl 60-90 parts of rock, 10-20 parts of fiber, 3-6 parts of vacuum active stabilizer, the production process includes the following steps: (1) Ingredients: put the materials into the mixer for full mixing; (2) Drying: Dry the evenly stirred mixture at a temperature of 100-120°C. During the drying process, measure the moisture content of the mixture every 8 minutes until the moisture content of the mixture reaches 0.5%. Below, stop drying; (3) Core molding: Put the dried material into the mold and scrape the surface; (4) Compression molding: Put the mold into a press machine and press it into a molding machine. The descending speed of the press machine is controlled at 3-7 cm/s, and the pressure is controlled at 20-80T/m ² ; (5) Wrapping: Take out the pressed core board from the mold, and wrap a layer of non-woven fabric around the core board to get the insulation core board; (6) Put the insulation core board into the high-resistance gas film bag to vacuumize, the vacuum degree is 0.02-20Pa, and then seal; The fibers include more than one of rock wool, glass fibers, lignin fibers and glass ceramic fibers mixed in any proportion, the length of the fibers is 3-12 mm, and the diameter is 0.2-13 microns; The vacuum active stabilizer is a mixture of activated carbon, barium-lithium alloy activator, calcium oxide, magnesium oxide, and silica gel mixed in any proportion. 2. The method for producing vacuum insulation panels using expanded perlite according to claim 1, characterized in that: the drying process of step (2) is carried out simultaneously in the process of step (1). 3. The method for producing vacuum insulation panels using expanded perlite according to claim 1, characterized in that: the non-woven fabric used in step (5) is a flame-retardant non-woven fabric, and the mass per unit area is 35-100g/m ² . 4. The method for producing vacuum insulation panels using expanded perlite according to claim 1, characterized in that, the high-barrier gas film bag is composed of an outer protective layer and an inner sealing layer. 5. The method for producing vacuum insulation panels using expanded perlite according to claim 4, characterized in that: said sealing layer comprises aluminum foil, polyester film, nylon film, polyethylene film, polyvinyl chloride film, polystyrene It is composed of one or more of ethylene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, ethylene/vinyl alcohol copolymer film, polycarbonate film, and polypropylene; the high gas barrier The outermost protective layer of the film bag is composed of more than one kind of glass fiber cloth, non-woven fabric, carbon fiber woven cloth, basalt fiber cloth and ceramic fiber cloth. 6. The method of utilizing expanded perlite to produce vacuum insulation panels according to claim 1, characterized in that: edge seals are provided at both ends of the high-barrier gas film bag, and the edge seals are located on the high-barrier gas film bag. On the opposite side of the two ends of the film bag, the other side opposite to the sealing edge is provided with an engaging groove matching the sealing edge.