JPH09209555A - Sound isolating floor substrate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve strength and sound isolating property by using a filler having a prescribed true specific gravity, and providing a floor substrate material having a prescribed surface density and a bending elastic modulus. SOLUTION: This floor substrate material contains a filler of 50-98wt.% having the true specific gravity of 2.5g/cm<3> or above and a binder of 2-50wt.%. A metal oxide, mineral crushed powder, glass fibers, glass powder, calcium carbonate, or plaster is used for the filler. An organic material such as a thermosetting resin, an inorganic material such as cement, or a mixture of them is used for the binder. The floor substrate material has the thickness of 10-25mm, the surface density of 30-100kg/m<2> , and the bending elastic modulus of 200-2000kg/mm<2> . The floor substrate material has sound isolating property and rigidity, and it can exert sufficient strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the propagation of impact sound, particularly heavy impact sound, downstairs in a residential construction in which a floor base material is installed on a joist and a floor finish material is further applied thereon. The present invention relates to a sound insulating floor base material that can be used.

[0002]

2. Description of the Related Art Conventionally, as a floor base material for reducing the floor impact sound to the downstairs, for example, a sheet or panel using a weight is used (see Japanese Patent Laid-Open No. 61-10665) and structural members. One in which a layer having a vibration damping property is laminated on a plywood or the like to be formed (see JP-A-54-42823 and JP-A-61-130537) has been proposed.

[0003]

However, the sheet or panel added with the above weight has insufficient floor rigidity and the like, and therefore cannot be constructed on the joists as a base and placed on the concrete slab. A house with a joist, which is used as a construction, requires a structural panel on the joist, which results in thickening of the entire floor, impairing the degree of freedom in design, and is not economical.

[0004] Further, in the case where a sound insulating buffer layer is laminated by giving strength to a plywood which is a structural member, the sound insulating panel is light in weight, and a sufficient effect against heavy impact sound cannot be obtained. An object of the present invention is to provide a floor base material having sufficient strength as a floor base material and having a sufficient sound insulation effect against heavy impact sound.

[0005]

The sound-insulating floor base material of the present invention contains 50 to 98% by weight of a filler having a true specific gravity of 2.5 g / cm ³ or more, 2 to 50% by weight of a binder, and a thickness of 10 to 10. 25
mm, areal density 30 to 100 kg / m ² , flexural modulus 200 to ²
It is set to 000 kgf / mm ² .

Examples of the above filler include metal oxides such as iron oxide, titanium oxide and magnesium oxide, particulate metal, crushed mineral powder such as clay, talc, mica and quartz powder, glass fiber and glass powder, Examples include calcium carbonate, gypsum, and the like.

The true specific gravity of the above-mentioned filler is limited to 2.5 g / cm ³ or more because the filling amount for obtaining a predetermined sound insulation property becomes too large and the strength of this layer decreases when it becomes small.

Further, the content of the above-mentioned filler is limited to 50 to 98% by weight because the sound insulation of the floor base material is deteriorated when it is reduced and the floor base material is difficult to be processed into a layer when it is increased.

The binder is used to form a layer of the filler, and for example, an organic material, an inorganic material, a mixture thereof or the like is used.

Examples of the organic material include thermosetting resins such as phenol resin, epoxy resin, urea resin, melamine resin, unsaturated polyester resin, urethane resin, etc., which are hardened or crosslinked by heating, butyl rubber, isoprene rubber, Rubber such as silicone rubber and NBR, thermoplastic resin such as polyolefin resin, polyvinyl chloride resin, EVA, polyamide resin, acrylic resin, polycarbonate resin, polyester resin, petroleum resin, etc. which are melted and softened by heating, and asphalt, And so on. Of these, thermosetting resins are preferable from the viewpoints of heat resistance, creep performance, compatibility with fillers, moldability, and the like.

Examples of the above-mentioned inorganic materials include cement, gypsum, ceramic materials and the like. Among them,
Cement is preferable in terms of heat resistance, creep performance, miscibility with the filler, moldability, and the like. In addition, these materials are
You may mix and use.

Further, the content of the above binder is limited to 2 to 50% by weight because the sound insulation of the floor base material is deteriorated when it is increased and it is difficult to process the floor base material into a layer when it is decreased.

In the floor base material of the present invention, when the thickness is thin, the sound insulating property and the mechanical strength are lowered, and when the thickness is thick, the position of the beam and the length of the pillar, and further, the portion related to the structure such as the floor height. Since design changes are required and conventional members and construction methods cannot be used, it is limited to 10 to 25 mm.

The sound-insulating floor base material of the present invention has a lower surface density, which lowers the sound insulation property, particularly the sound insulation performance against heavy impact sound, and the higher the surface density, the heavier the floor base material is, the specification of the structure of the structure. Since it will be necessary to change
Limited to 00 kg / m ² .

The sound-insulating flooring base material of the present invention is too soft as a flooring base material when the bending elastic modulus is low, and a good walking feeling cannot be obtained. Since the floor base material is too hard to reduce the workability, 20
It is limited to 0 to 2000 kgf / mm ² .

For the sound insulation floor base material of the present invention, a plasticizer, a lubricant, a stabilizer, a flame retardant, a crosslinking aid, a reinforcing material, a filler and the like suitable for the above binder may be appropriately used.

The sound-insulating flooring base material of the present invention is most economically manufactured as a single layer, but has a cutting property, a nailing property,
When a slight improvement in water resistance or the like is required, a multi-layered structure may be formed by laminating two or more layers of a floor base material that is thinly manufactured or providing a skin layer. In the case of a multi-layered structure, it may be appropriately adjusted so that the thickness, the surface density, and the bending elastic modulus of the entire floor base material fall within the above ranges.

[0018]

【Example】

Example 1 100 parts by weight of iron oxide powder having a true specific gravity of 5.3 and 25 parts by weight of novolac-based phenol resin powder were mixed, and the temperature was 140 ° C.
It was pressed at a pressure of 5 kg / cm ² for 20 minutes to obtain a floor base material having a thickness of 20 mm. A 50 mm × 350 mm test piece was cut out from the obtained floor base material and subjected to a bending test and a weight measurement.

Further, the remaining floor base material is cut into 910 mm x 910 mm and placed on an I-shaped steel frame of the same size, and JIS-
The sound insulation performance was measured by the heavy impact sound generator described in A1418, and the sound insulation grade was determined according to JIS-A1419.
Further, the cut floor base material was placed on a joist having a pitch of 500 mm with a beam having a span of 1000 mm and walked on the joist, but the walking feeling at that time was not abnormal. It was possible to nail the floor base material.

Example 2 100 parts by weight of calcium carbonate having a true specific gravity of 2.7, 50 parts by weight of an unsaturated polyester resin containing a high-temperature initiator and 50 parts by weight of acetone were mixed, and 30 parts by weight of glass fiber chopped strands were added. Impregnate the mat, room temperature 48
Dry the solvent in time, temperature 140 ℃, pressure 5kg / cm
^It was pressed at ² for 5 minutes to obtain a floor base material having a thickness of 20 mm.

Bending tests, weight measurements and sound insulation performances were evaluated in the same manner as in Example 1 using the obtained floor substratum. The obtained floor substratum had no abnormal feeling in walking and could be nailed.

Example 3 100 parts by weight of iron oxide powder having a true specific gravity of 5.3, 100 parts by weight of ordinary Portland cement and 70 parts by weight of water were mixed and cast to have a thickness of 20 mm to obtain a floor base material.

Bending test, weight measurement and sound insulation performance were evaluated in the same manner as in Example 1 using the obtained floor base material. The obtained floor substratum had no abnormal feeling in walking and could be nailed.

Example 4 100 parts by weight of iron oxide powder having a true specific gravity of 5.3, 400 parts by weight of polyvinyl chloride containing a heat stabilizer having a degree of polymerization of 800, and 20 parts by weight of chopped strand glass fiber having a length of 6 mm in a powder state. Mix with super mixer, temperature 190 ℃, pressure 20kg / c
It was pressed at m ² for 10 minutes to obtain a floor base material having a thickness of 25 mm.

Bending test, weight measurement and sound insulation performance were evaluated in the same manner as in Example 1 using the obtained floor base material. The obtained floor substratum had no abnormal feeling in walking and could be nailed.

Example 5 100 parts by weight of iron oxide powder having a true specific gravity of 4.7 and 40 parts by weight of polyurethane resin were mixed, and 450 g / m ² chopped strand mat was laminated on the upper and lower surfaces, and 140 ° C., pressure 2 kg / c.
It was pressed at m ² for 10 minutes to obtain a floor base material having a thickness of 15 mm.

Bending test, weight measurement and sound insulation performance were evaluated in the same manner as in Example 1 using the obtained floor base material. The obtained floor substratum had no abnormal feeling in walking and could be nailed.

Comparative Example 1 A bending test, a weight measurement and a sound insulation performance were evaluated in the same manner as in Example 1 except that a structural particle board having a thickness of 25 mm was used as a floor base material. The obtained floor substratum had no abnormal feeling in walking and could be nailed.

Comparative Example 2 100 parts by weight of iron oxide having a true specific gravity of 5.3 and 40 parts by weight of blown asphalt were mixed and kneaded by heating and pressing at a temperature of 200 ° C., and then pressed at a temperature of 120 ° C. and a pressure of 4 kg / cm 2 for 5 minutes. A sheet having a thickness of 15 mm was obtained. The thickness of the obtained sheet is 1
A floor base material was obtained by sticking to a 0 mm structural particle board with an adhesive.

The bending test, the weight measurement and the sound insulation performance were evaluated in the same manner as in Example 1 using the obtained floor base material. In addition, a walking test was conducted in the same manner as in Example 1 using the obtained floor base material, and as a result, the floor was bent and felt soft, and an abnormality was recognized. It was possible to nail the floor base material.

Comparative Example 3 A floor base material was obtained in the same manner as in Comparative Example 2 except that the sheet was press-molded to have a thickness of 20 mm. Bending test, weight measurement and sound insulation performance were evaluated using the obtained floor base material in the same manner as in Example 1. However, the sound insulation performance could not be evaluated because the panel was destroyed by the impact sound generator.

Comparative Example 4 A steel sheet having a thickness of 5 mm was attached to both surfaces of a particle board having a thickness of 10 mm with an adhesive to obtain a floor base material having a thickness of 20 mm. The bending test, the weight measurement, and the sound insulation performance were evaluated in the same manner as in Example 1 using the obtained floor base material. The obtained floor substratum had no abnormal feeling in walking, but could not be nailed.

Comparative Example 5 A floor base material was obtained in the same manner as in Example 1 except that press molding was performed so that the thickness became 10 mm. The bending test, the weight measurement, and the sound insulation performance were evaluated in the same manner as in Example 1 using the obtained floor base material. The obtained floor substratum had no abnormal feeling in walking and could be nailed.

Table 1 shows the above evaluation results.

[0035]

[Table 1]

[0036]

The sound-insulating flooring base material of the present invention has excellent sound-insulating properties because it uses a filler having a predetermined true specific gravity, and further has a predetermined surface density and bending elastic modulus. Since it has high rigidity, it exhibits sufficient strength as a floor base material.

Claims (1)

[Claims] 1. A filler having a true specific gravity of 2.5 g / cm ³ or more is 50 to
98% by weight, 2 to 50% by weight binder, thickness 1
A sound-insulating floor base material having a surface density of 0 to 25 mm, an area density of 30 to 100 kg / m ² , and a flexural modulus of 200 to 2000 kgf / mm ² .