JP2733333B2 - Manufacturing method of soundproof flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

TECHNICAL FIELD The present invention relates to a soundproof flooring material that can be directly attached to a slab with improved soundproofness.

[Prior art]

As the soundproof flooring material, the present inventors have already cut a plurality of cut grooves 2 from the back side of the substrate 1 to the front side as shown in FIG. We have been developing a structure in which rubber sheets 4 are laminated. In this case, the nonwoven fabric cushion material 3 and the foamed rubber sheet 4
, The rubber sheet 8 as shown in FIG.
The nonwoven fabric cushion material 3 is supplied onto the rubber sheet 8 when it is carried into the hot blast stove 11 and foamed by 10, and the foamed rubber sheet 14 and the nonwoven fabric cushion material 3 are laminated and integrated by being pressed by the weight roller 12. I have.

[Problems to be solved by the invention]

Conventionally, the temperature in the hot blast stove must be as high as 180 to 200 ° C., so that the non-woven fabric cushion material 3 shrinks due to the hot air and the difference in the amount of shrinkage between the foam rubber sheet 4 and the non-woven fabric cushion material 3 causes Wrinkles had occurred. Non-woven fabric cushioning material 9
Was insufficiently softened, and the adhesive strength with the foamed rubber sheet 4 was weakened. The present invention has been made in view of the above circumstances, and its purpose is to reduce the heat shrinkage of the nonwoven fabric cushioning material, and to prevent wrinkles from occurring at the time of laminating with a foam rubber sheet, and furthermore, to adhere. It is an object of the present invention to provide a method of manufacturing a soundproof floor material capable of increasing the force.

[Means for Solving the Problems]

The present invention relates to a method for manufacturing a soundproof flooring material in which a plurality of cut grooves 2 are cut from the back surface side of the substrate 1 toward the front surface side, and the nonwoven fabric cushion material 3 and the foamed rubber sheet 4 are sequentially laminated on the back surface of the substrate 1. When the foamed rubber sheet 4 is formed by heating and foaming the rubber sheet 8, the hot-melt nonwoven fabric 9 is melted to laminate and integrate the nonwoven fabric cushioning material 3. Has been resolved. [Function] When the foamed rubber sheet 4 is formed, the hot-melt non-woven fabric 9 is melted and the non-woven fabric cushion material 3 is laminated and integrated. Does not thermally shrink, and the nonwoven fabric cushioning material 3 and the foamed rubber sheet 4
No wrinkles occur during the pressure bonding, and the nonwoven fabric cushion material 3 and the foamed rubber sheet 4 can be continuously laminated and integrated while securing the adhesive force. [Example] The substrate 1 is, for example, 0.3 mm
If the thickness is about the thickness, a protruding plate 6 such as a material is stuck, and a plurality of cut grooves 2 are provided on the plywood 5 of the substrate 1 from the back side to the front side. The cut grooves 2 are provided in a lattice shape. The kerf 2 has a width of 3 mm and a pitch of 60 m, for example.
Cut at m. This cut groove 2 does not reach the surface of the plywood 1. An anti-vibration sheet 7 is interposed between the plywood 5 and the veneer 6 of the substrate 1. The vibration isolating sheet 7 is a soft material such as nonwoven fabric, natural rubber, synthetic rubber, urethane resin, silicon resin, etc., and is usually a soft material having a thickness of 1 mm or less. In this case, by increasing the rubber fraction of a synthetic rubber sheet such as an NR sheet or an SBR sheet, the impact may be further repelled to improve the vibration isolation. A nonwoven fabric cushion material 3 having a thickness of 2 to 2.5 mm and a foam rubber sheet 4 having a thickness of 2.5 to 4 mm are sequentially laminated on the back surface of the plywood 5 of the substrate 1. The non-woven fabric cushion material 3 is, for example, a polyester-based material, and the foamed rubber sheet 4 is a rubber sheet formed of natural rubber containing 60 to 80% by weight of SBR synthetic rubber, and other vulcanizing agents (including a foaming agent) and a softening agent. 8 is foamed. The lamination and integration of the nonwoven fabric cushion material 3 and the foamed rubber sheet 4 are performed as follows. As shown in FIG. 1, the rubber sheet 8 is
Thus, the foamed rubber sheet 4 is formed by being carried into the hot blast stove 11 and foamed. This foamed rubber sheet 4 has a back surface protruding in a lattice shape as shown in FIG. 3 by a wire mesh belt of the belt conveyor 10. Simultaneously with the transfer of the rubber sheet 8 into the hot blast stove 11, the nonwoven fabric cushion material 3 having the polyamide-based hot melt nonwoven fabric 9 adhered to the back surface shown in FIG. You. In the hot blast stove 11, the hot melt nonwoven fabric 9 is melted (melting temperature 80 to 120).
C), the foamed rubber sheet 4 and the nonwoven fabric cushioning material 3 are pressure-bonded and integrated by the weight roller 12. The soundproofing flooring material A manufactured in this manner has a soundproofing property of L-.
It is secured at 45 levels and is laid directly on a concrete surface such as a concrete slab of a building via an adhesive.

【The invention's effect】

The present invention relates to a method for manufacturing a soundproof flooring material in which a plurality of cut grooves are cut from the back surface side to the front surface side of a substrate, and a nonwoven fabric cushion material and a foamed rubber sheet are sequentially laminated on the back surface of the substrate. When the foamed rubber sheet is formed, the hot-melt nonwoven fabric is melted and the nonwoven fabric cushion material is laminated and integrated. Therefore, wrinkles do not occur when the nonwoven fabric cushion material and the foamed rubber sheet are press-bonded, and the nonwoven fabric cushion material and the foamed rubber sheet can be continuously laminated and integrated by securing the adhesive force.

[Brief description of the drawings]

FIG. 1 is a schematic view for explaining one embodiment of the present invention, FIG. 2 is a cross-sectional view showing a nonwoven fabric cushion material and a hot melt nonwoven fabric, and FIG. FIG. 4 is a cross-sectional view showing a sound-insulating floor material manufactured by the above method, and FIG. 5 is a schematic view for explaining a conventional example, where A is a sound-insulating floor material, 1 is a substrate,
2 is a cut groove, 3 is a nonwoven fabric cushion material, 4 is a foamed rubber sheet, 8 is a rubber sheet, and 9 is a hot melt nonwoven fabric.

Claims (1)

(57) [Claims] In a method of manufacturing a soundproof flooring material, a plurality of cut grooves are cut from the back surface side of the substrate to the front surface side, and a nonwoven fabric cushion material and a foamed rubber sheet are sequentially laminated on the back surface of the substrate. A method for producing a soundproof flooring material, comprising melting a hot-melt nonwoven fabric and laminating and integrating a nonwoven fabric cushioning material when forming a foamed rubber sheet by foaming.