JPS6288897A - Heat-insulating material and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a heat insulating material that can be used as a heat insulating layer of a futon, a cover for heating or cooling, and a method for manufacturing the same.

<Prior Art> Styrofoam has conventionally been used as a material with excellent heat insulating properties. It is also well known that this expanded polystyrene is used as a molded body for containers for keeping heat or cold. However, styrofoam molded into a molded product has no flexibility. For applications that require flexibility, aggregates of fibers such as cotton or soft foams such as urethane foam are used.

<Problems to be Solved by the Invention> In applications that require flexibility, there is a problem that there is no product that utilizes expanded polystyrene, which is very advantageous in terms of heat insulation and cost.

An object of the present invention is to provide a flexible heat insulating material that can utilize the heat insulating properties and other excellent features of foamed Nutilol.

Means for Solving the Problems> In the first aspect of the invention, particulate expanded polystyrene is present in a dispersed state in the fiber group.

The means according to the second invention is a manufacturing method in which unfoamed raw material particles of expanded Nutirol are dispersed in a fiber group, and then the unfoamed raw material particles are foamed.

The means according to the third aspect of the present invention is a manufacturing method in which unfoamed raw material particles of expanded polystyrene are dispersed in a group of fibers, and then the unfoamed raw material particles are foamed. This manufacturing method includes a step of spraying and supplying a liquid adhesive that bonds between the expanded polystyrene particles and the fibers.

In the means according to the first invention, the presence state of the expanded polystyrene particles in the fiber group may be, for example, even if the expanded polystyrene particles are present in the entangled fibers and are only held by the fibers, It may be in a state where it is bonded at the contact portion.

In the means of the first, second, and third inventions, the fibers used may be animal or plant fibers such as wool, cotton, and linen, chemical fibers such as polyester, acrylic, and nylon, and other fibers alone or A mixture or the like may be used.In short, it is sufficient to use a material that can withstand the foaming temperature of expanded polystyrene, and consideration should be given to the heat insulating property and durability depending on the intended use of the heat insulating material.

In the means according to the third aspect of the invention, the adhesive is supplied to the fiber group immediately before the unfoamed raw material particles are dispersed into the fiber group, or at the stage where the unfoamed raw material particles are dispersed into the fiber group. It is preferable to supply it to these, or to the fiber group and the foamed nutirol particles after foaming. The liquid adhesive used is not particularly limited as long as it can bond the expanded polystyrene and the fibers used without dissolving it, and examples include polyvinyl acetate copolymer and acrylic adhesive.

Function> The first invention has a structure in which styrene foam particles with excellent heat insulation properties are held by fiber groups, so the heat insulation properties are closer to styrofoam than, for example, a heat insulating material made only of fiber groups. be.

Furthermore, since the styrofoam particles have an integral structure with the fiber group in a state substantially similar to the shape of the fiber group, the particles have flexibility as a whole.

In the manufacturing method of the second invention, since the unexpanded raw material particles of expanded polystyrene are dispersed in the fiber group and then foamed, the dispersed state of the expanded polystyrene particles in the fiber group is good, and the unexpanded raw material particles are dispersed in the fiber group. Since the particles expand and become larger when the raw material particles enter, a state in which the expanded polystyrene particles are held by the fibers is obtained.

In the manufacturing method of the third invention, in addition to the method of the second invention, the adhesive is sprayed and supplied, so that the styrene foam particles in the fiber group are partially adhered to the fibers, and the fibers are partially bonded to each other. A bonded state is obtained, and the retention of the expanded polystyrene particles by the fiber group is strengthened.

Embodiments FIG. 1 shows a heat insulating material 1 according to a first embodiment of the present invention, in which 2 represents expanded polystyrene particles and 3a represents fibers.

This heat insulating material 1 can be manufactured as follows.

The fiber group 3 is fed onto the conveyor 10 in FIG. 2 in the form of a belt having a predetermined width and thickness, and the fiber density is made as coarse as possible. Then, the fiber group is continuously transferred, and unexpanded raw material particles 2a of expanded polystyrene are dispersed and supplied from above on a conveyor 11 following this. In the figure, reference numeral 12 denotes a dispersion device, which has a large number of evenly spaced recesses on the surface of a rotary row/l/13 that are large enough to accommodate some of the raw material particles 2a, and a part of the circumferential surface is circumscribed at the lower end of the hopper 14. By rotating the roll 13 at a constant speed, a constant amount of raw material particles 2a is dispersed. Conveyor 11
A vibrator 15 is installed as necessary. As a result, the raw material particles 2a enter between the fibers 3a and are sufficiently dispersed from the upper part to the lower part. The next conveyor 16 is a heating area,
While passing through this conveyor 16, the unfoamed raw material particles 2a are foamed to become expanded polystyrene particles 2. Heating is 120-
Steam at 130°C is supplied so as to flow from the top to the bottom. Next, the liquid adhesive is sprayed and supplied from the upper nozzle/L/18 on the conveyor 17, and then a predetermined thickness is applied to the thickness adjustment area made up of a number of pairs of rollers 19 under the L. Blow drying hot air while applying a little pressure between the rollers so that the drying temperature is maintained. In the figure, 20 is a hot air jet nozzle. And finally, wind it to low) v 21.

The heat insulating material 1 processed in this manner has an integral sheet-like or mat-like shape in which the fibers 3a and the fibers 3a and the expanded polystyrene particles 2 are partially adhered to each other by the adhesive tails.

FIG. 3 shows another embodiment of the heat insulating material 30, in which additional layers 31, 32 of fiber groups are laminated on both sides of the heat insulating material 1 of the first embodiment. This structure is suitable for use in clothing and bedding, and the layers 31 and 32 of the fiber group are formed on both the upper and lower surfaces of the heat insulating material 1.
If the layers 31 and 32 are to be bonded, the layers 31 and 32 may be laminated immediately after the adhesive is sprayed on the conveyor 17 of the first embodiment.

<Effects of the Invention> According to the present invention, a heat insulating material that has the excellent heat insulating properties of expanded polystyrene and has flexibility that cannot be obtained with expanded polystyrene alone can be obtained. Therefore, it can be used as a heat insulating layer in cold-weather clothing and bedding, and it can also be used as a heat insulating material for thermal covers and cold covers that still require opening/closing or removal of various equipment and devices. can be taken as a thing. Note that this heat insulating material can also be used as a packaging material whose main purpose is cushioning, similar to the use of conventional styrofoam.

[Brief explanation of drawings]

FIG. 1 is an enlarged partial cross-sectional view of one embodiment of the heat insulating material of the present invention, FIG. 2 is a schematic diagram of a manufacturing apparatus for explaining the method of manufacturing the heat insulating material of the same embodiment, and FIG. FIG. 7 is an enlarged partial cross-sectional view of another example of the heat insulating material. 1... Insulating material, 2... Styrofoam particles, 2a.
...Unexpanded particles of expanded polystyrene, 3a...Fiber, 3
...Fiber group, 30...Insulating material, 31.32...Fiber group layer.

Claims (3)

[Claims] (1) A heat insulating material in which particulate Styrofoam is dispersed in a fiber group. (2) A method for producing a heat insulating material, in which unfoamed raw material particles of expanded polystyrene are dispersed in a fiber group, and then the unfoamed raw material particles are foamed. (3) In a method for producing a heat insulating material, in which unfoamed raw material particles of expanded polystyrene are dispersed in a fiber group, and then the unfoamed raw material particles are foamed, a gap between the unfoamed raw material particles and the fibers of the fiber group or foamed A method for producing a heat insulating material, comprising the step of spraying and supplying a liquid adhesive so as to bond between the Styrofoam particles that have finished the process and the fibers of the fiber group.