JPH0538929Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention can be directly attached to building materials, especially windows, walls, etc., and can be applied directly to building materials, especially windows, walls, etc., to insulate the interior of the room from the outside, and to prevent condensation using a hygroscopic paint. Regarding the prevention sheet.

[Prior Art] Conventionally, there has been a phenomenon in which condensation occurs in bathrooms, changing rooms, kitchens, Japanese-style rooms, toilets, etc. in houses, and as a result, mold grows.
In particular, this has become a big problem in Japan, which has a humid climate.

[Problems to be Solved by the Invention] However, although various attempts have been made in the past to solve these problems, no sufficient effect has yet been achieved.

Therefore, an object of the present invention is to provide an anti-condensation sheet which effectively prevents the occurrence of condensation inside a house and also has a heat insulating effect.

[Means for Solving the Problems] That is, according to the present invention, there is provided a cushioning material in which convex protrusions forming a large number of independent air chambers are provided on one surface of a thermoplastic resin film, the cushioning material An anti-condensation sheet is provided, which is coated with an adhesive on one side and coated with a hygroscopic paint on the other side.

The cushioning material is a thermoplastic resin film with convex protrusions that form a large number of independent air chambers on one side.
It is widely used as a shock-absorbing packaging material for goods as it is a shock-absorbing material that combines soft shock-absorbing material with independent air chambers and excellent mechanical strength.

In the present invention, by using this cushioning material as a base material, we have created an extremely effective sheet that not only has heat insulation properties from the outside of the building, but also has the effect of preventing condensation inside the building.

[Example] Next, according to an example of the present invention shown in the drawings,
Explain in detail.

In the illustrated example, 1 is the anti-condensation sheet of the present invention, 2 is a thermoplastic resin film, 3 is a convex projection, 4 is an adhesive, and 5 is a hygroscopic paint.

The thermoplastic resin film 2 and the convex protrusions 3 are preferably made of the same material in view of heat fusion properties when forming the protrusions, and polyamide, polyester, polyolefin, etc. can be used. In particular, its workability is good,
Examples of polyolefins include low-density polyethylene,
High-density polyethylene, cotton-like low-density polyethylene,
Homopolymers such as polypropylene, ethylene-
Examples include copolymers such as vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-ethyl acrylate copolymer, and mixtures thereof.

In addition, when considering the melt flowability and thermal adhesiveness of the thermoplastic resin when forming the convex projections 3, low density polyethylene, cotton-like low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl A mixture of acrylate copolymers can be particularly preferably used.

Antioxidants, ultraviolet inhibitors, antistatic agents, lubricants, inorganic fillers, and the like can also be added to these thermoplastic resins.

In addition, the melt index (MI) of the thermoplastic resin used is 0.1 to 30 g/10 minutes, preferably 1 to 30 g/10 minutes.
15 g/10 minutes is preferable because it has excellent moldability and physical properties.

The shape of the convex protrusion 3 may be spherical, such as prismatic, cylindrical, elliptical, hemispherical, or a combination thereof.

The convex protrusion 3 has a height of 1 to 20 mm, particularly preferably about 2 to 18 mm, and a base area of 0.1 to 15 cm ² .
Particularly preferably cylindrical, with a size of about 0.2 to 10 ^cm2 ;
It is preferable that the air chamber has a columnar shape such as an elliptical columnar shape. The distance between the convex protrusions 3 is 0.5~
It is preferable that they are arranged over the entire surface so as to have a width of 20 mm, particularly 1 to 15 mm.

Next, an example of a method for manufacturing the anti-condensation sheet 1 of the present invention will be described.

Using a kneading device such as a twin-screw extruder, a thermoplastic resin and appropriate additives are melt-kneaded to prepare a resin composition. Next, using the thermoplastic resin composition, a raw material film with a thickness of approximately 10 to 300 μm is formed using an extrusion molding machine, and the first film is wound around a heated calendar roll that has many recesses on the peripheral wall. Then, a film (embossed film) having a large number of convex projections 3 on the entire surface is formed under heating. Furthermore, a thermoplastic resin film 2 is wrapped in a heated state over the embossed film having the convex projections 3, and the films are thermally fused on a calendar roll to form an independent air chamber. A cushioning material having a large number of convex projections 3 on the entire surface is formed.

Next, a solution prepared by adding adhesive 4 to a solvent at an appropriate concentration and mixing it is applied to one side of the buffer material using a roll coater, and a mixed solution in which hygroscopic paint 5 is added to the other side of the buffer material. Apply to.

The liquid in which the adhesive 4 is dispersed or dissolved, or the liquid in which the hygroscopic paint 5 is dissolved, may be applied to the top surface of the convex protrusion 3, or may be applied to the thermoplastic resin film 2 side. good.

Furthermore, the temperature at which the liquid is applied to one surface of the buffer material must be lower than the melting temperature of the thermoplastic resin forming the buffer material. The viscosity of the liquid measured with a rotational viscometer at room temperature is 1000 poise or less, especially
It is preferable that it is 800 poise or less.

As the adhesive 4, natural rubber, synthetic rubber, recycled rubber, polyisobutylene, polyvinyl ether,
Adhesive base agents such as polyacrylic ester, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-acrylic ester copolymer, etc., rosin, ester gum, polyterpene, petroleum resin, xylene resin, Examples include those containing tackifiers such as oil-soluble phenol resins and coumaron indene resins, plasticizers, fillers, and anti-aging agents.

Further, as the hygroscopic paint 5, a super absorbent resin is suspended in a liquid, and water-based and oil-based paints can be used, but water-based paints are preferred, and emulsion paints are particularly preferred. As the super-absorbent resin, conventionally known ones can be used, and for example, super-absorbent resin made of acrylic resin, specifically, Sanyo Chemical Industries, Ltd., trade name: Sunwet, is preferably used.

Since the anti-condensation sheet has such a structure, when the indoor temperature rises to 60-100%, the superabsorbent resin absorbs moisture into it, preventing condensation caused by temperature differences. , when the humidity is low, the resin performs a moisture releasing function. Therefore, no condensation occurs indoors, and the growth of mold, which is the cause of allergies and the like, is prevented.

The anti-condensation sheet of the present invention can be colored as desired to make it more beautiful.

[Effects of the invention] As explained above, the dew condensation prevention sheet of the present invention prevents mold from forming indoors because it prevents dew condensation, has excellent insulation properties from the outside of the building, and is extremely lightweight. It has the advantage of having soft cushioning properties based on sealed air cushioning properties.

[Brief explanation of the drawing]

The drawing is a sectional view of the anti-condensation sheet of the present invention. 1... Anti-condensation sheet, 2... Thermoplastic resin film, 3... Convex projection, 4... Adhesive, 5
... Hygroscopic paint.

Claims (1)

[Scope of utility model registration request] This cushioning material has convex protrusions forming a large number of independent air chambers on one side of a thermoplastic resin film, and one side of the cushioning material is coated with an adhesive, and the other side is coated with a hygroscopic paint. Anti-condensation sheet made by coating.