JPS60949A - Multilayer structure synthetic resin shape - 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 The present invention relates to a synthetic resin molded article having a multilayer structure suitable for use in side moldings, spoilers, etc. of vehicles.

When installing a synthetic resin molded body J, side molding or spoiler on the exterior of the vehicle, the molded body has weather resistance d3 J:
It is required to have excellent heat resistance and solvent resistance that is not attacked by wax remover, etc., and to have b 111ffi.

In view of the above requirements, this company has created a multilayered synthetic resin molded product that has excellent weather resistance, heat resistance, and solvent resistance, and is lightweight.
The purpose is to provide fN.

Furthermore, in the multilayer synthetic resin molded article of the present invention, the inner layer is a foamed molded article of polystyrene beads having an extremely high expansion ratio, and side moldings and the like using this can be extremely lightweight. The layer surrounding the inner layer is a 2m layer consisting of an outer skin layer and an inner skin layer, and the outer skin layer has weather resistance and heat resistance A.
3 J: Excellent solvent resistance! ,: Made of vinyl chloride resin.

By the way, the above polystyrene f? When the inner layer of a foam molded product is directly wrapped with an outer skin layer of vinyl chloride, the plasticizer contained in the vinyl chloride enters the inner layer, causing cracks in the inner layer. Therefore, in the present invention, an inner layer made of a fin-based synthetic resin is interposed between the outer layer and the inner layer to resist plasticizers and function as a burr A7. Prevents deformation of 1F1, gives durability (l+) to malls, etc.

The present invention will now be described with reference to the illustrated embodiments.

The figure shows a cross section of a reed trolley made of a multilayered synthetic resin molded article according to the present invention. The foaming ratio is extremely high at 5 to 20 times.

An outer skin R2d and an inner skin layer 3 are formed on the upper surface of both sides of the inner layer 1 so as to cover them. The outer skin layer 2 is made of vinyl chloride resin, which has excellent weather resistance, heat resistance, and solvent resistance.
It is a ζ thing.

By the way, the above-mentioned vinyl chloride resin contains plasticizers such as Tsutomi DiActyl phthalate 1~, but polystyrene J:
There is a problem that when the above-mentioned iJ plastic agent enters the inner layer 1, it swells or dissolves and loses its shape.

Therefore, in the present invention, an inner skin layer 3 is provided between the inner layer 1 and the outer skin layer 2 to prevent the plasticizer from entering. That is, the endothelial layer 3 is made of a Δrefin-based synthetic resin such as polypropylene or polyethylene, which is resistant to plasticizers and does not allow them to pass through.

On the lower surface of the inner layer 1 is formed a back layer 4 made of a foam such as polypyrene, polyethylene or urethane. Adhesive 5 is placed on the lower surface of the back layer 4 at predetermined locations, which allows the molding body to be attached to the vehicle body surface.
) can be done.

As described above, the side molding made of the synthetic resin molded product of the present invention has an inner layer made of a piece foam molded product with a high optical foam ratio, making the whole extremely lightweight.Moreover, since the skin layer is made of vinyl chloride resin, it is weather resistant. It also has excellent heat resistance and solvent resistance. The plastic agent contained in the vinyl chloride resin in the outer skin layer is effectively prevented from penetrating into the inner layer by the inner skin layer interposed between the inner layer and the outer skin layer, thereby preventing deterioration of the inner layer.

Incidentally, the above-mentioned side molding is manufactured, for example, in step 1 below. First, epidermal layer 2 and endothelium 1f? i 3. Laminated synthetic resin sheets and bonded by thermocompression bonding.

Next, the joined resin sheets are formed into a trapezoidal container shape by vacuum forming, filled with polystyrene beads that have been expanded in advance, and then poured into a mold.

In addition, on the molding surface of the mold,
ii Apply Baseto -C 3. When these are heat-molded in one direction, the resin paste is foamed and solidified to form the back layer 4 so as to close the container 17rJD of the resin sheet, and the beads filled in the container become rough. The foamed molded product 1 roars as it foams. In this way, a reidall made of a synthetic resin molded product is molded up to the multilayer 1f's with the highly foamed molded product 1 as the inner layer.

'': In Example 13, if the endothelial layer 3 is made of a foamed A-refin synthetic resin, elasticity can be imparted to the entire 1-nid.

Further, the back layer 4 does not necessarily have to be made of a foamed material, but by covering it with a foamed material, it closely follows the surface of the vehicle, and adhesion is performed well. J3, the back side FA4 is also composed of an outer skin layer of petrovinyl resin and an inner skin layer of olefin resin, just like the front side.

As described above, the multilayered synthetic resin molded article of the present invention has excellent weather resistance, heat resistance, and solvent resistance, and is also lightweight, so it is used for the 11-car reit 7-ru A゜) Suboin. It has a great effect.

[Brief explanation of the drawing]

The figure is a sectional view of a side molding for a vehicle made of a synthetic resin molded article of the present invention.1゜1...Inner layer 2...Outer skin layer 3...Inner skin layer

Claims (3)

[Claims] (1) An inner layer made of a foam molded product of polybrene beads, an outer skin layer made of vinyl chloride resin, and a plasticizer contained in the vinyl chloride resin that is provided between the inner layer and the outer skin layer and forms the outer skin layer 4M. A multilayered synthetic resin molded body consisting of a durable synthetic resin J and an inner skin layer. (2) The multilayer synthetic resin molded article according to claim 1, wherein the endothelial layer is composed of a sheet of olefin-based synthetic resin. (3) The multilayer synthetic resin molded article according to claim 1, wherein the endothelial layer is made of a foamed olefin-based synthetic resin.