JPH02258340A - Ceiling trimming material - Google Patents

Abstract

PURPOSE:To make a base light and thin, improve molding properties and increase rigidity by forming a sandwich structure by means of pieces of paper bonded on both surfaces of the synthetic resin base through synthetic resin bonding material layers, providing a melting point of the base not to be melted at the temperature of a temperature-regulated press mold and melting the bonding material layers thereon. CONSTITUTION:Pieces of paper 5 and 6 are bonded to both surfaces of a synthetic resin base 2 through synthetic resin bonding material layers 3 and 4 as a sealing material 1 and forms a sandwich structure. The base 2 is provided with a melting point of 200 - 230 deg.C not to be melted at the temperature of a press mold regulated preliminarily while the bonding material layers 3 and 4 are provided with a melting point of 100 - 160 deg.C to be melted at the temperature of press mold. As the bonding material layers 3 and 4 of a curved section of sealing material 1 are in the molten state and the base 2 is made of synthetic resin and slippery, the curved section is deformed freely without being restricted to the base 2. As the sealing material 1 is of good molding properties and constituted of a synthetic resin plate and pieces of paper, the same is inexpensive, light and thin and the head clerances in a car room can be enlarged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ceiling interior material used in automobiles and the like.

[Conventional technology and its issues]

Conventionally, this type of ceiling interior material has been made by stacking three layers of cardboard (see Utility Model Application Publication No. 57-204138), but since the component is cardboard, the cost is high and the weight is very high. The problem was that it was heavy and thick, which narrowed the head clearance in the passenger compartment and had poor formability.

The present invention was made in view of such conventional problems,
The purpose of the present invention is to provide a ceiling interior material that is low in cost, lightweight, has a thin plate thickness, can expand the head clearance of a vehicle interior, has good formability, and is highly rigid.

[Means to solve the problem]

In order to achieve this object, the present invention provides a substrate made of synthetic resin and this 7! It forms a sandwich structure consisting of paper bonded to both sides of a board via a synthetic resin adhesive layer, and the substrate has a melting point that does not melt at the temperature of a press mold whose temperature has been regulated in advance, and the adhesive layer This is a ceiling interior material characterized by having a melting point that melts depending on the temperature of the press mold.

[For production]

Each layer of the substrate, adhesive layer, and paper is prepared as a raw material in the state of tacking, and is placed between the upper and lower molds of a press mold, and then pressurized. In this case, each layer is molded using a press mold, and the temperature-controlled heat of the press mold is transmitted to the seal, melting the adhesive layer. After the mold is released, the adhesive layer is cooled and solidified to adhere the paper to the substrate.

During this forming process, at the curved part of the ceiling interior material, the paper is deformed by compressive force on the inside of the bend and tensile force on the outside, but at this time, the adhesive layer is in a molten state and the substrate is Since it is made of synthetic resin that is inherently slippery, it is not constrained by the substrate and deforms freely. In other words, it has good moldability. In addition, each adhesive layer is formed uniformly without breaking even in areas where the tensile force is strong, and stable adhesive strength can be obtained.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes a ceiling interior material, which is coated with kraft paper or the like on both sides of a synthetic resin substrate 2 having a predetermined thickness via an adhesive layer 3.4 also made of synthetic resin. paper 5,
6 are adhered to form a so-called sandwich structure, and a surface material 7 such as a nonwoven fabric or a padded resin sheet is adhered to the surface of one of the gis 5, and a thin polyester film 8 is adhered to the surface of the other gi 6. is pasted.

The substrate 2 is made of, for example, polyester (PET), which has a melting point of 200 to 230°C, which does not melt due to the temperature of a press mold whose temperature has been adjusted in advance, and the adhesive layer 3,
4 is a melting point of 11 which melts depending on the temperature of the press mold.
For example, olefin-based or polyamide-based resins having a temperature of 0 to 160°C are used.

The method for molding such a ceiling interior material 1 is the same as the method for molding ordinary corrugated board, in which the substrate 2, the adhesive layer 3゜4, the layers 5, 6,
Each layer of the surface material 7 and film 8 is left as a raw material in the state of tacking, and as shown in FIG.
It is placed between the mold 0a and the lower mold 10b, and then pressurized. In this case, each layer is molded by the press mold 10, and the controlled heat of the press mold 10 is transmitted to the papers 5 and 6, and the adhesive layer 3
．． 4 melts. After the mold is released, the adhesive layer 3.4 is cooled and solidified, and the papers 5 and 6 are adhered to the substrate 2, and at the same time, the surface material 7 and the polyester film 8 are adhered and pasted to the sheets 5 and 6. .

In this forming process, in the curved parts A and B of the ceiling interior material 1, the papers 5 and 6 are deformed by compressive force a on the inside of the bend and tensile force on the outside. layer 3,4
Since it is in a molten state and the substrate 2 is made of synthetic resin that is inherently slippery, it is not constrained by the substrate 2 and deforms freely. In other words, it has good moldability. In addition, each adhesive layer 3, 4 will not break even if it is in a place where the tensile force is strong (it can be formed uniformly and stable adhesive strength can be obtained,
Rigidity is also increased.

This type of ceiling interior material has good moldability as mentioned above, and since its constituent members are synthetic resin board and paper, it is less expensive and lighter in weight than conventional cardboard.
Moreover, the board thickness is thinner, allowing for greater head clearance in the passenger compartment. Furthermore, since the substrate 2 made of synthetic resin is inserted, it goes without saying that moisture permeability is also improved.

〔effect〕

As explained above, according to the present invention, a sandwich structure is formed of a synthetic resin substrate 2 and paper adhered to both sides of the substrate 2 via a synthetic resin adhesive layer, and the substrate is The ceiling interior material is inexpensive and lightweight because it has a melting point that does not melt at the temperature of the press mold whose temperature has been adjusted in advance, and the adhesive layer has a melting point that melts at the temperature of the press mold. Not only
It has various practical effects such as increasing the head clearance of the vehicle compartment, having good moldability and high rigidity, and improving moisture permeability.

[Brief explanation of drawings]

Fig. 1 is a sectional view taken at II'f3 in Fig. 2 showing an embodiment of the present invention, Fig. 2 is a perspective view of the ceiling interior material of the present invention, and Fig. 3 similarly shows the molded state of the ceiling interior material of the present invention. FIG. l...Ceiling interior material, 2...Synthetic resin substrate, 3.4...Adhesive layer, 5.6...
...Paper, 10...Press mold, 10a...
- Upper mold, 10b...lower mold. 3rd note

Claims (1)

[Claims] It has a sandwich structure consisting of a synthetic resin substrate and paper bonded to both sides of the substrate via a synthetic resin adhesive layer, and the substrate has a melting point that does not melt due to the temperature of a press mold whose temperature has been adjusted in advance. and the adhesive layer has a melting point that melts depending on the temperature of the press mold.