JPS5896544A - Laminated sheet for molding - 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 an I& shape laminated sheet used for automobile interior materials and the like.

Conventional automotive interior materials include thermoplastic resin films (or sheets) on both the front and back sides of a base material made of thermoplastic resin foam.
A covering material consisting of gelaurethane (7 ohm), synthetic woven fabric (7 ohm) and woven fabric was laminated on the surface of the film λ.

However, in the case of the above-mentioned conventional interior material formed from laminated seeds, the heat resistance and dimensional stability of the laminated sheet are poor, so when the interior material is exposed to a high temperature atmosphere, it tends to expand or contract. It has some drawbacks and is therefore poor in image retention, so for example, when it is used as an interior material for a tempura bowl in a car, it is go-so'.

When exposed to high temperatures above, the thermoplastic resin base material softens and forms a curved shape, sagging toward the indoor side, causing problems both in terms of performance and appearance. There were drawbacks to it. In addition, conventional interior materials have low rigidity and poor mechanical strength, so there is a risk of bending or damage due to external impact forces, and they lack durability.

In view of the above points, the present inventors conducted extensive research and found that the above-mentioned conventional drawbacks could be overcome by layering glass star and thermoplastic resin thin film on thermoplastic resin foam. The invention was completed. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a *m* layered sheath which is excellent in heat resistance, dimensional stability and carving stability, and has great rigidity and mechanical strength.

That is, the gist of the present invention is a laminated sheet for molding characterized by comprising a thermoplastic Sat foam layer, a glass couscous layer, and a thermoelectric resin thin film layer.

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

In FIG. 1 (A) showing an embodiment of the laminated seed of the present invention, 1 is a thermoplastic resin foam layer formed in a flat plate shape, and on one side of the foam layer 1 is a glass cloth layer! are stacked,
A thin thermoplastic 111N layer 1 is formed on the glass cloth layer 2.
are layered. Note that the foam layer 1 may be added as necessary.
The facing material 4 (FIG. 11 (b)) or the thin film layer 3 (FIG. 1 (c)) may be laminated on the other image. Figure 82 shows another embodiment of the invention, in which a thin film layer 3 is provided on one side of the foam layer 1.
are laminated, and a glass foil layer 2 is laminated on the surface of the thin film layer 30. Note that a covering material 4 may be laminated on the other side of the foam layer 1 if necessary.

In each of the above examples, the glass cloth layer is only on one side of the foam layer 1! However, as an embodiment of the plane of the present invention, as shown in FIGS. good. That is, the laminated seed shown in Figure 3 has a glass cloth layer 2 and a thin film layer 3 laminated on both the front and back sides of a foam layer 1, and the stirrup sheet shown in Figure 114 has a foam layer 10 on both the front and back sides. Thin film layer 3jl and glass star layer! It is a layered structure. In the embodiments shown in Figures 13m and 94, the covering material 4 may be laminated on the thin film layer 3 on one side and the glass cloth layer 2 on the other side, respectively, if necessary.

The foam layer 1 in the present invention is a foam of thermoplastic resin such as bostyrene, styrene-maleic anhydride copolymer, polypropylene, ethylene-propylene copolymer, crosslinked polyethylene, or a mixture of two or more of the above resins. Body foam can be used. Among the above resins, styrene - anhydrous! Leic acid copolymer foams are sometimes preferred. The foam layer 1 may be prepared by a molding method using a molding method or by a bead molding method in which pre-expanded particles are placed in a mold, but the former is used in this case. . J! The foaming ratio and thickness of the foam layer 10 are arbitrary and are selected depending on the application. ! Magnification tS ~ 40@, preferably 5-15 times, thickness 1-20 Im, preferably 2-71 Im
is within the range that is preferably used.

The glass star connecting layer 2 in the present invention is constructed by combining warps 51% 1ib and wefts made of glass fibers in a lattice shape as shown in *5Wt-Simplified Figure 7.・Does not have an intertwined textile structure. That is, the warp S m s S k and the weft
Although they intersect at right angles, they are not intertwined. Therefore,
The glass star layer 2 has a constituent yarn laminated structure, in which the weft is laminated on the warp s1 of Ill so as to intersect with the warp 5 at right angles in a non-interlaced manner, and the weft is laminated on the warp s1 of The warp S of Ill intersects with the weft 6 at right angles in a non-interlacing manner.
The positions that do not correspond to &, that is, the 11 warps a and S that are adjacent to each other
It is made by laminating all warp threads lb arranged at the interlocking positions of &. The warp threads 5aqSk and the weft threads are joined by a binder at non-interlacing intersections. As will be described later, such a constituent yarn laminated structure has a high degree of elongation and is easily deformable, so it has the advantage of good moldability.

In addition, the non-entangling crossing angle between the warp sa% 5b and the weft 6 is not limited to a right angle, but it is possible to make them intersect at any angle in a non-entangling manner, and also in three layers with two warps and one weft. It is not limited to the structure, and the number of constituent threads can be arbitrarily determined.

The glass cloth layer 2 has a mesh due to the non-interlacing intersection of warp threads 5*S5 and weft threads, but if the density of l1m (strands/2 Swm) is too large, the degree of elongation and deformation will be low. If the density is too small, the reinforcing effect cannot be sufficiently exerted, so it is necessary to select an appropriate density. A density of 3/25 threads/20 threads/2i threads is suitable for the long threads, sewing threads, and weft threads.

The thickness of the warp and weft is 30
0 to 1200 deniers are preferred. Furthermore, the binding yarns and weft yarns of the present invention may be twisted or untwisted. Preferably, it is not twisted 9 or is slightly twisted.

The thin film layer 3 in this invention may be constructed as a synthetic resin sheet F or as a synthetic resin film.
One or two types of mature plastic fat such as impact-resistant ones), styrene-maleic anhydride copolymers (including impact-resistant ones), fluoropylene, ethylene-propylene copolymers, &9 ethylene, etc. A mixture of the above can be used.

Although the thickness of the thin film layer 3 is arbitrary, it is usually 0.01 to 2 m.

Although the facing material 4 is not essential in the present invention, the appearance can be improved by laminating the facing material 4. As the facing material 4, cyclized vinyl sheets, boron urethane sheets, synthetic paper, leather, knitted fabrics, nonwoven fabrics, etc. can be used.

The foam layer 1, the gastestasis layer, the thin film layer 3, and the facing material 4 may be laminated by heat bonding or adhesive bonding, and any suitable means may be employed.

Next, an example of the method for manufacturing the laminated sheet of the present invention will be explained based on FIG. II9. The thermoplastic resin foam sheet 1' and the glass cloth sheet 2' wound into a roll are continuously supplied to the arrow direction and then folded into the -11-9.1-way. On the other hand, the cram school flexible resin sheet 3' is melted and extruded from the Heibun-11 installed above the 4th Ru, 10, and is continuously pushed into the Kasumi 10th, Koe So-k 9 .14)11
″c foam sheet 1′, !Tusters sheet 2′, 111
The three pieces of the 11M sheet 1' are pressed and welded together to form a seed layer sheet 11 of the present invention. In this case, the semi-molten resin sheet 3' is a glass cloth sheet! In addition to welding to the foam sheet 1' by selecting the mesh of the glass crisscross 2', the three members are joined and integrated. At this time, the foam sheet 1' is the foam layer 1
The I tester start 2' constitutes the glass crystal screw 2, and the resin sheet 1' constitutes the thin film layer 3, respectively. after that,
If necessary, the facing material 4 is bonded to the area of the foam sheet 1' using an adhesive.

Book J! The 1111-layer sheet is particularly suitable for use as an interior material for automobiles (interior materials such as ceilings and door boards), but of course there is no standard for this, and it is generally used as interior material for houses, Needless to say, it can also be used as a heat insulating material.

The present invention is used for laminated sheet molding. To explain one example of this effect, a laminated sheet of the present invention that has been pressed into a seal shape or a laminated sheet of the present invention in a plate shape is continuously supplied to a heating furnace, and heated in the heating furnace to the resin softening temperature.
The softened sheet that has passed through the heating furnace is then exposed to a molding machine and subjected to continuous pressure forming or vacuum acid molding to form a predetermined shape, and then trimmed to obtain a molded product with a predetermined size and shape. It is. During this forming process, the sheet is stretched and deformed, and therefore the glass tariff layer of each layer that makes up the sheet! However, as mentioned above, the glass cloth of layer 2 has a laminated structure of constituent threads, so when it is subjected to force during molding (pressing force or suction force) Warp 5
The as5bs weft threads stretch each other in the non-interlaced intersecting part, without interfering with each other's shadows, and stretch, IIl! i
Therefore, the glass cloth has a large degree of elongation and is easily deformed, and can fully handle the effects, elongation and deformation during molding, and can be molded into a downward convex shape as shown in the gS diagram. There is no risk of the glass cloth being cut or broken even in the exposed areas. By the way, the structure of glass cloth is 111
As shown in 0-! In the case of a textile structure in which 1iA7 and the weft $ are intertwined, the binding thread 1 and the weft opening on the right side of the intertwining point have a small degree of elongation as a glass crisscross body because they interfere with each other's elongation and honey shadow. Therefore, when the above-mentioned molding is performed, there is a risk that the glass cloth will not correspond to the elongation and shape during molding, and the glass cloth will be cut or broken.

In addition, the glass fiber layer 2 in the present invention is not necessarily limited to the above-mentioned constituent yarn laminated structure, but may be one having a high degree of elongation, easy deformation, and excellent moldability similar to the above-mentioned structure. Similarly, the present invention is integrated with the present invention.

As mentioned in 11 above, since the laminated sheet of the present invention has a raster layer, it has excellent heat resistance and dimensional stability, and is effective in preventing shrinkage of the foam layer and thin film layer to the maximum extent in a high-temperature atmosphere. . Furthermore, since the laminated sheet of the present invention has the above-mentioned Gatesta cross layer, it has excellent engraving retention properties, and therefore, even when exposed to high temperatures when the laminated sheet of the present invention is used as an interior material for the interior ceiling of an automobile, for example, the laminated sheet of the present invention has a curved shape. There is no problem with the barley carving and hanging on the inside of the room.

Furthermore, since the laminated sheet of the present invention has the above-mentioned glass cloth layer, it has high amphoteric properties and mechanical strength, and has excellent durability without being easily bent or damaged by external force. .

Next, specific examples of the present invention will be described.

Styrene-anhydrous by extrusion coloring method! A foamed sheet made of leicic acid copolymer with a thickness of 3.2cm and a foaming ratio of 10 times was obtained, and this foamed sheet and warp yarns having a laminated structure of constituent yarns,
Glass cloth sheath with a density of both wefts of 10/25cm and a thickness of 800 denier threads, and styrene - anhydrous! A melt-extruded non-foam sheet made of a rain copolymer and a non-foamed sheet made of an OS proverb, with a thickness of O, is put into a pair of four-layer layers, and the three are pressed and welded together in one loop, with the Shigarasuku PS sheet acting as the middle layer. They were integrated to produce a laminated sheet for molding. This laminated sheet was tested for strength, heating dimensional change rate, and length. For Hiso's sake, a similar test was conducted on a plane laminate sheet having the same structure as the above laminate sheet except that it did not have a glass cloth layer. The results are shown in Table 111. The above tests were conducted in the following manner.

l)-Gage strength Mu I? Measured by MDI03 2) Heating dimensional change rate It was carried out according to JAIll M 304.

■Two marked lines perpendicular to the vertical and horizontal directions on a test piece as shown in 111111 -9! , -(, In this case, the length al*"l of each gauge line y, , y, is 1!i6■
, the distance between the end of each drift y, , y, and the end of the test piece is 2s.

JAII) A test was conducted based on MS04 to determine the heating dimensional change rate. #I% The heating temperature was 5 ott, and the opening during heating was 1ss.

3) Deflection 11112 As shown in the figure, the test piece m (length x width 1
50 m) was supported at two points, and the sag (P(w)) during heating at 90° C. for 100 hours was measured, and this value was taken as the deflection. In the figure, Q+ and Qt indicate support points.1 This support point Q*
, the distance of Qt! I closed it with SOO■. L indicates the length dimension (550 cm) of test piece 1.

Next, after heating the laminated sheet F of the present invention in a heating furnace to soften the resin, I! It was a shadow. This IL shape had a convex gate shape with a depth of 30 mm, but no cutting of the glass cloth was observed in the concave and convex portions.

111 Table LII Simple explanation of one picture lll--II9 Figures show embodiments of the present invention.
Figures 1--I4 are longitudinal cross-sectional drawings of the laminated sheet of the present invention, IIb are perspective views of the main parts showing the layered structure of Gatesta 4th, and Figure 6 is vertical cross-sectional drawings of the 5th layer. Figure 8 shows a vertical cross-section of an 85m L-wire, Figure 8 is a vertical cross-sectional view of the main part showing the uneven parts obtained by applying the laminated sheet F of the present invention, and Figure 9 is a vertical cross-sectional view of the laminated sheet F of the present invention. 11 Meikaku showing the method, Uki 1611 is a perspective view of the main part showing the textile structure of glass cloth -, 111
Figure 1112 is an explanatory diagram showing each test method for heating dimensional change rate and deflection.

1.-Thermoplastic resin foam layer! −・Glass cloth layer,
3-・Thermoplastic resin thin film layer, 11-・Laminated sheet for defect shadowing Fig. 1 Fig. 3 Group 4 Fig. 5-1 Fig. 7 C Fig. 6) a Fig. 8 Fig. 9 2 b3 cil D4 Figure 10 Figure 12

Claims (1)

[Claims] A laminated sheet for acid forming, comprising a thermoplastic resin foam layer, a glass foam layer, and a thermoelectric resin thin film layer.