JPS608997Y2 - Translucent insulation laminate - Google Patents

Description

[Detailed description of the invention] The present invention is a thermoplastic resin film having convex protrusions forming independent air chambers and a laminated resin plate or glass plate, which has translucent, heat-insulating properties. This invention relates to a lightweight, translucent heat insulating laminate with excellent sound insulation and mechanical properties.

Conventionally, translucent insulation can be used for insulation materials such as walls and roofs of structures that require translucency and heat insulation, translucent insulation materials that require decorative properties, and insulated containers that require transparency. As a board, glass board, acrylic board, PVC hard board, FRP
Transparent plates such as plates, polystyrene-based or acrylic foam boards, polyethylene-based foam sheets, etc. have been used.

However, transparent plates like the former sacrifice insulation performance in order to maintain their transparency, and foams like the latter sacrifice transparency in order to maintain their insulation properties. .

As a means to compensate for both of these problems, a transparent plate like the former is processed and molded into a double structure, or a hollow extruded plate-like body made of a deformed diamond is used.

However, even with the plate-shaped material obtained by this method, its insulation performance is much lower than that of foam, and its production cost is extremely high compared to its performance. This is completely unsuitable for the era of resource conservation.

In particular, the amount of fuel used to heat greenhouse cultivation, where greenhouse cultivation is popular, is enormous, and the heating costs for houses in winter are also enormous.

Nowadays, when the use of solar energy is greatly discouraged, the present invention is a structure that was finally completed as a result of intensive research in view of the actual market conditions.The purpose is to provide a structure with excellent transparency and high It has good insulation performance and mechanical strength.
An object of the present invention is to provide an energy-saving type translucent heat insulating board at a low price that can utilize solar energy to a large extent.

That is, a transparent film with a thickness of 0.2 mm or more, preferably 0.5WrL or more is coated on both sides of a thermoplastic resin film having 5/10 (k: J or more) convex protrusions forming independent air chambers. A laminate in which resin plates or glass plates are laminated, and a translucent heat-insulating laminate having a metal or synthetic resin frame placed around the laminate to integrally seal the laminate. It is a board.

The thermoplastic resin film referred to in this invention includes polyethylene, polypropylene, ethylene vinyl acetate copolymer,
Ethylene-based polymers such as ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, or metal salts thereof, or vinyl chloride, vinylidene chloride, polycarbonate, polyphenylene oxide, vinyl acetate, polyester, or styrene, methyl Copolymers of styrene, ethylstyrene, chlorstyrene, alkenyl aromatic compounds such as those mentioned above and other easily polymerizable olefin compounds, such as maleic anhydride, acrylic acid, methacrylic acid, etc., rubber reinforcing polymers, etc. It includes general thermoplastic resin films of so-called styrene polymers, acrylonitrile, methyl methacrylate, acrylonitrile-butadiene-styrene copolymers, acrylonitrile-styrene copolymers, etc., or mixtures thereof.

Furthermore, the synthetic resin referred to in the present invention includes not only the above-mentioned thermoplastic resins but also so-called thermosetting resins such as phenol resins, urea resins, and melamine resins.

The translucent heat insulating laminate of the present invention will be explained with reference to the drawings. As shown in FIGS. 1 and 2, a film 1 having convex projections and a transparent thermoplastic resin plate or glass plate 2 are laminated. Furthermore, the periphery of this laminate is sealed with a metal or plastic frame 3 and integrated.

Furthermore, the content of the present invention will be explained in detail.

First, the first feature of the present invention is the use of a thermoplastic resin film having 5 or more convex protrusions/100 cJ forming independent air chambers.

That is, by having an independent air chamber as described above, its heat insulation performance is greatly improved, and it is possible to obtain a much higher heat insulation performance than an assembly of glass plates or hollow tubes. In addition, having a large number of independent air chambers means that it is lightweight, and as a result, it has much better workability than glass plates, etc., and is also highly safe during processing and transportation.

Additionally, the structure has excellent sound insulation properties.

Furthermore, it maintains its light transmittance and maintains its translucency.

Therefore, the effect obtained by the first feature of the present invention described above is that it has a heat insulating performance comparable to that of foam, and a translucency comparable to that of an acrylic board, a vinyl chloride sheet, or the like.

The second feature of the present invention is that both sides of the film have a thickness of 0.
It is to laminate transparent laminated resin plates or glass plates with a thickness of 2 mm or more.

That is, by laminating thick plate-shaped bodies on the surface layer, the mechanical strength represented by the bending strength of the structure of the present invention is improved, surface smoothness is imparted, and depending on the material, weather resistance can be improved. It also improves performance.

It is advantageous to increase the strength or thickness of the laminated laminated resin plates or glass plates as described above, or to reinforce them with metal, glass fiber, or synthetic resin fiber.

For example, pasting the above metals or fibers on the surface,
Alternatively, the plate-shaped bodies to be laminated may themselves be metal or may have the above-mentioned fibers therein.

The third calculating machine of the present invention is that the periphery of the above-mentioned laminated objects is
It is a laminated board that is sealed and integrated with a frame made of metal or synthetic resin.

That is, sealing the surrounding area in this way is a necessary condition to make the air layer inside the laminate independent from the outside air, to keep water absorption and thermal conductivity low, and to maintain heat insulation performance.

More specifically, in a place where the seal is loose and gas moves in and out rapidly, heat transfer occurs between the air inside the laminate and the outside air, resulting in an extremely poor performance as a heat insulator.

In addition, if rain or snow penetrates into the laminate, the refractive index of the light beam will change, and it will also affect the state of heat conduction.
This results in poor light transmittance and poor heat insulation properties.

Next, a method for manufacturing the structure of the present invention will be described.

Films having protrusions as in the present invention include, for example, independent air films manufactured by the method described in Japanese Patent Publication No. 37-1378, Japanese Patent Publication No. 38-33-inch, or Japanese Patent Publication No. 834-1973. Mention may be made of films having a large number of convex projections forming chambers.

To describe an example of a method for manufacturing the protrusion film, for example, a sheet of raw material film that has been heated and softened is wound around a heated calender roll having many four parts corresponding to the convex shape of the protrusion film, and the concave portions are A convex protrusion is formed by bringing the raw material film into close contact with the film, and then a second film that has been heated and softened is wrapped around the film on which the protrusion has been formed, so that the convex protrusion becomes independent. A method of thermally adhering the material to the air chamber is suitable.

Films with their independent air chambers may also be used for adhesive purposes within the scope of the present invention.

In addition, the shape of the convex protrusion is cylindrical, elliptical, cylindrical,
It may have any shape such as a prismatic shape, and is not particularly limited, but is preferably a cylindrical shape or an elliptical shape.

The size of the protrusions is 2 to 30 mm in height, preferably about 5 to 20 mm, and the number of protrusions is 5 7100 cf.
L or more, preferably 10 to 100 cft to 20
0 pieces/100C7+! It is preferable that the air chamber forms a columnar air chamber.

Furthermore, the thickness of the film used may be about 10 to 500 microns, preferably about 100 to 200 microns.

In addition, depending on the case, an ultraviolet absorber or a coloring agent may be added.

Next, the thickness of the transparent resin plates or glass plates to be laminated is determined depending on the required strength, but it is necessary that the thickness is 0.2rrvn or more.

Particularly preferably, the thickness should be 0.5 mm or more, and it may be mixed with an ultraviolet absorber, a coloring agent, or an anti-aging agent.

An example of adhesion with a film having convex projections is to heat the surface of the resin plate or glass plate to be laminated on the surface to a temperature higher than the softening temperature of the film having convex projections, and to thermally fuse the surface. is possible.

Further, depending on the material forming the surface layer, it may be possible to heat-seal the convex protrusions of a film having convex protrusions at the same time as processing them.

In addition, attachment using an adhesive may also be considered.

In this case, adhesives include hot-melt adhesives, solvent-based adhesives, emulsion-based adhesives, or epoxy resins made from thermoplastic resins such as vinyl acetate, polyisobutylene, and ethyl methacrylate polymers. Examples include room-temperature curable or thermosetting adhesives containing unsaturated polyesters, amino resins, etc. as main components.

Further, depending on the case, it is sufficient to form a sandwich structure and seal the periphery with a metal or synthetic resin frame without performing adhesive or fusion processing.

Next, the places where the translucent heat insulating board of the present invention can actually be used include walls and roofs for greenhouse cultivation, roofs of sunrooms in houses, substitutes for glass windows, soundproof curtains, partitions,
It can be used as other interior decoration items.

Each evaluation item used in this invention is based on the following evaluation method and evaluation scale.

■ Thermal conductivity evaluation method: ASTM-C-518! , : Compliant, K
It was evaluated in units of cal 7m-hr0°C and as a value at 0°C.

■ Bending strength evaluation method: Tested according to the method of JIS-A-9511, and evaluated by the value determined by the following formula.

f=dan bh2 f: bending strength p: Maximum load 1 nispan distance b: Width of sample plate h: Thickness of sample plate (kg/CIt) (kg) (clrL) (cm) (crrL) ■ Sound insulation (transmission loss) Evaluation method: Measured based on ASTM-E-90.

In other words, we used a test chamber with a structure in which two reverberation chambers were connected with an aperture as a boundary, one of which was a sound source chamber and the other a sound receiving chamber.
A sample was attached to the opening and the difference in sound pressure level between the two chambers was measured and evaluated.

Test piece: 1.5 m, The average sound pressure level in the sound receiving room was measured using a microphone level recorder.

On the other hand, the sound absorption power of the sound receiving room was separately measured by the aftertone method, and the transmission loss TL (dB) was calculated using the following formula.

L, , L2: Average sound pressure level (dB) of sound source room and sound receiving room S: Sample area (-) A: Sound absorption power of sound receiving room (771″) ■ Total transmitted ray rate Evaluation method: Measured according to ASTM-D-1003.

*Next, the superiority of the present invention will be further clarified through Examples and Comparative Examples.

Example 1/Comparative Example 1 Ultraviolet absorber (trade name: Tinuvin-P) was prepared by using an ultraviolet absorber (trade name Tinuvin-P) on both sides of a film of about 10 thicknesses made of polyethylene having independent air chambers as shown in Table 1. )
Transparent plates of polymethyl methacrylate containing
A laminate with a length of 1800 mm was prepared.

The periphery of the laminate was sealed with a vinyl chloride frame using epoxy adhesive.

The obtained laminate was evaluated for thermal conductivity, bending strength, sound insulation, and total transmitted light rate.

The results are shown in Table 1.

According to Table 1, it can be seen that the laminate of the present invention must have 5 or more convex protrusions forming independent air chambers/100cJ, and the thickness of the face material must be 0.2TIrr11 or more. .

Example 2/Comparative Example 2 The sample Sakaide used in Example 1/Comparative Example 1, the surface material of 1°3.5 was replaced with polymethyl methacrylate by 3.
A laminate was prepared in exactly the same manner as in Example 1 and Comparative Example 1, except that a glass plate with a strength-reinforced wire mesh having a thickness of OwIt was used, and the same evaluation was performed.

Corresponding to each sample plate, NO, 1'? 3't 5'
They are numbered and shown in Table 2.

According to the results in Table 2, it can be seen that good results can be obtained even if a glass plate is used as the surface material instead of a synthetic resin plate.

Example 3/Comparative Example 3 In order to clarify the position of the laminate of the present invention compared to current commercially available products, the same plans as in Example/Comparative Examples 1 and 2 were carried out for the following items. I did it.

Laminated board of this invention (representative) No. 19 N
o, 3' Commercial item A (polyethylene foam sheet) Thickness 3rIrfn
Glass plate thickness 31rrIIt
The results are summarized in Table 3.

According to Table 3, it can be seen that the laminate of the present invention satisfies the level of practical values in all evaluation items, and has characteristics not found in current commercially available products.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a translucent heat insulating board of the present invention, and FIG. 2 is a sectional view taken along the line AA' in FIG. 1. . 1...Film having convex projections, 2...
...Transparent thermoplastic resin plate or glass plate, 3...
...Metal or plastic frame.

Claims (1)

[Scope of utility model registration request] 5/10 convex protrusions forming independent air chambers
Thickness 0 on both sides of thermoplastic resin film having 0 cm or more
．． A laminate in which 2 rran or more of transparent resin plates or glass plates are laminated, and a frame made of metal or synthetic resin is arranged around the laminate to integrally seal the laminate. Translucent heat insulating laminate.