JPS61108548A - Sheet for thermoforming - 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 thermoformable sheets.

The thermoformable sheet of the present invention can be used not only for molded containers and molded lids, but also for the production of stationery such as binders.

[Conventional technology]

BACKGROUND ART Conventionally, a thermoformable thermoneutral citrus resin sheet consisting of one layer or multiple layers has been used as a thermoforming sheet, and a molded product obtained by thermoforming such a sheet is used as g15.

On the other hand, ``plastic products lack a sense of envy in their appearance.''
do. Therefore, inside'II packaged with plastic molded products
Wlj looks cheap. There is a demand for plastic molded products to be processed to give them a sense of luxury.

In response to such demands, efforts are being made to make the plastic surface matte, colored, flocked on the surface, or mix fillers into the resin to give it a first-class feel. Not only is this method ineffective, but if the manufacturing loft is small, the cost increases compared to a normal molded container.

[Problem that the invention seeks to solve]

Therefore, the problem to be solved by the present invention is to provide a thermoforming sheet that can produce a molded product that eliminates the cheapness characteristic of plastics.

[Means for solving problems]

The present inventor has solved the above problems (as a result of research) and developed a sheet for aging molding by extruding and laminating a thermoformable thermoplastic resin sheet consisting of one or more layers on one side of a non-woven fabric. The inventors have discovered that by doing so, it is possible to obtain a molded product that does not give the feeling of cheapness that is characteristic of plastics, and based on this knowledge, the present invention has been completed.

That is, the gist of the present invention is a thermoformable sheet formed by extrusion lamination of a thermoformable thermoplastic resin sheet consisting of one side (one side) or multiple layers of nonwoven fabric.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows a thermoforming sheet of the present invention, in which (2) is a nonwoven fabric and (1) is a thermoplastic resin sheet.

As shown in the second figure, the thermoformable sheet of the present invention is produced by rolling out the non-woven fabric (2) and rolling it into a pressure roll (4) and a water-cooled roll (5).
It was obtained by passing the thermoplastic resin (7) through a T-die +61 through bath melt extrusion and bonding together, and cooling with a water-cooled roll (5).

Here, the thermoplastic resin (7) is polystyrene,
A material that can be thermoformed by vacuum forming, pressure forming, etc., such as polyvinyl chloride, polyester, or polyacrylonitrile polypropylene, is used. Thermoplastic resin sheet (1)
It may be formed not only into a single layer but also into a multilayer by coextruding polystyrene, polyvinyl chloride, polyester, polyacrylonitrile, polypropylene, ethylene-vinyl acetate copolymer, polyester, polyacrylonitrile, vopropylene, polycarbonate, etc. Also, polystyrene, polyvinyl chloride, ethylene vinyl acetate copolymer, polyester, polyacrylonitrile, polypropylene,
A barrier resin such as saponified ethylene-vinyl acetate co-polymer or polycyclized vinylidene may be co-extruded with polycarbonate or the like. Next, from the viewpoint of thermoformability as a nonwoven fabric, polypropylene, polyethylene, etc.
An olefin-based nonwoven fabric of t/d is desirable. However, polyamide nonwoven fabrics and polyester nonwoven fabrics can also be used.

As the nonwoven fabric, a nonwoven fabric impregnated or coated with a water absorbing polymer such as modified PTA, grafted starch, sodium polyacrylate, OMO, etc. may be used as necessary. The inner surface of the container has excellent water absorption by using a maturing sheet made by bonding a non-woven fabric impregnated or coated with a water-absorbing polymer with a thermoplastic resin sheet. It is possible to obtain a packaging container having:

[For production]

In the present invention, the nonwoven fabric (2) imparts a high-grade appearance to the molded product. As shown in Figure 3, the molded product is thermoformed so that the woven fabric (2) surface is on the outside of the molded product, and the outer surface of the molded product is made of the nonwoven fabric, giving it a high-class appearance. On the other hand, as shown in Figure 4, when the non-woven fabric [2] is thermoformed into a molded article, the base pattern of the non-woven fabric can be seen through the transparent thermoplastic resin l- on the outside of the container. It has a high-class appearance.

Furthermore, in the case of thermoforming so that the surface of the nonwoven fabric is on the inside of the molded article, the nonwoven fabric can be used as a water-absorbing layer.

〔Example〕

Example 1 Polypropylene 640μ/Modified polypropylene resin (Mitsui Ishimagaki Kagaku ■, part name: Admer) 40μ/Engineered ethylene vinyl acetate copolymer saponification 40μ/Capsular polypropylene resin (Mitsui Petrochemical ■, part name; Atomer) 40μ
A sheet with a specification of 340μ of polypropylene was coextruded, while a polypropylene nonwoven fabric of 100 μm was
? The original fabrics of ~ were gauzed and bonded together using a pressure roll to obtain a nonwoven fabric/polypropylene/modified polypropylene resin (manufactured by Mitsui Petrochemicals, trade name: Atmer)/ethylene-vinyl acetate sheet.

This sheet was subjected to edge forming in a vacuum forming machine with the nonwoven fabric side facing outward to obtain a tray of 1051i x 160 x 25 mm.

This tray had a high-quality appearance reminiscent of washi paper, had good gas barrier properties, and could be retorted.

Example 2 Polypropylene 640μ/Modified polypropylene resin (manufactured by Mitsui Petrochemicals U, trade name: Atmer) 40μ/Saponified ethylene-vinyl acetate copolymer AOμ/Modified polypropylene ## resin (Mitsui Petrochemicals ■Crack, trade name: Atmer) 40
A sheet with a specification of 340 μ/Volip a pyrene was co-extruded, and on the other hand, a pre-printed polypropylene nonwoven fabric 1 “OOof!/111” was fed out from a paper feed roll, and the printed surface was pressed with a pressure roll. The sheets were laminated so as to be on the outside to obtain a sheet with specifications of nonwoven fabric/bog 7cI pyrene/silica polypropylene resin (manufactured by Mitsui Petrochemicals IIIJ, trade name: Atmer)/vinyl ethylene oxide.

This sheet was molded using a vacuum forming machine with the non-woven fabric side facing outward to form 105m1 x 160+++m x 25mm.
Got a tray of.

This tray had the appearance of Japanese paper, had a high-quality finish with beautiful printing, had good gas barrier properties, and could be retorted.

Example 3 A polypropylene non-woven fabric 80mm was extruded as a polypropylene sheet with a thickness of 'tOffim, and on the other hand was printed in advance from a paper feed roll. The raw fabric β was pasted with the edges d and the edges d and the σ-rules 2 and 2 with the mark ff+1 on the outside (2) to obtain a sheet with specifications for nonwoven fabric/polypropylene.

A container obtained by molding this sheet by vacuum compression molding with the nonwoven surface facing outward had a good appearance similar to that of Example 3.

Example 4 Polypropylene 340μ / Polypropylene resin (Mitsui Ishimagari Kagaku@, If, product name: Atmer) 40μ / Saponified polyethylene vinyl acetate copolymer 40μ / Modified polypropylene resin (Mitsui Ishimagari Chemical, trade name) ; Adman 4
A sheet having a specification of a μ/polypropylene of 340 μ is co-extruded, and on the other hand, a pre-printed polypropylene nonwoven fabric of 100 P/ln” is fed out from a paper feed roll, and a pressure roll C is applied so that the printed surface is on the inside. (By laminating the two, nonwoven fabric/bosip a pyrene/modified polypropylene resin (manufactured by Mitsui Ishigaku Kagaku ■, product name: Atmer)
/Ethylene vinyl acetate specification sheet was obtained.

This sheet was subjected to edge forming in a vacuum forming machine with the nonwoven fabric side facing outward to obtain a tray of 105 dragon x 16 o dragon x251111.

This tray had the appearance of washi paper, had a luxurious finish with a squash pattern, had good gas barrier properties, and was capable of being retort-killed.

Example 5 A polypropylene nonwoven fabric of 8 mm was extruded from a polypropylene sheet with a thickness of 1.0 mm, and printed in advance from a paper feed roll. The original fabric of /♂ was rolled out and bonded with a pressure roll so that the printed surface was on the inside to obtain a sheet with specifications of nonwoven fabric/polypropylene.

All of this sheet is air-formed using pure nitrogen with the non-woven fabric side facing outward.
The container obtained by molding from two pieces had a good appearance similar to that of Example 4.

Example 6 Polypropylene 340μ/Modified polypropylene resin (Mitsui Petrochemicals, trade name: Atmer) 0/J/Ethylene-vinyl acetate copolymer saponified product 40μ/Modified polypropylene resin 11B (Mitsui Petrochemicals ■, part name; Atmar)
A sheet with a specification of 40μ/340μ of polypropylene was coextruded, while a polypropylene nonwoven fabric of 100 μm was fed from a paper feed roll. The original fabric of β was rolled out and bonded together at a pressure of 40 l, polypropylene/modified polypropylene resin (manufactured by Mitsui Petrochemical Co., Ltd., part name: Atmer)/ethylene acetate beer joint saponified product/modified polypropylene resin (Mitsui Petrochemical Co., Ltd.) Made by ■, product name: Atmer)/polypropylene/
FIt of non-woven fabric? A composite sheet was created.

This sheet was molded using plug assist vacuum pressure forming C2 with a nonwoven fabric as the inner surface to a size of 110+I11×160amX.
A 25vn container was prepared.

Raw meat was placed in this container together with an oxygen scavenger, heat-sealed and sealed with a lid made of 60 μm of polyvinylidene chloride coated polyesterna 127 ethylene vinyl chloride copolymer easy peel sealant, and stored under refrigeration. , good external properties were maintained without the occurrence of drips.

〔Effect of the invention〕

As described in detail above, the thermoformable sheet ζ2 of the present invention can easily be used to form a high-grade pongee molded product by ripening. Furthermore, by thermoforming C2 so that the nonwoven fabric is on the inside of the container, it is possible to obtain a container that is most suitable for packaging juicy contents such as meat and fish.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the thermoformable sheet of the present invention, the second factor is a schematic diagram showing the manufacturing process of the thermoformable sheet, and Figure 3 is a side view of a molded product made using the thermoformable sheet of the present invention. FIG. 4 is a cross-sectional view of another example of a molded product using the aged sheet of the present invention. (1)・・・・・・・・・・・・・・・Thermoplastic resin sheet (2)・・・・・・・・・・・・・・・−
・Nonwoven fabric patent applicant Daiichi Printing Co., Ltd. Agent Patent attorney Atsushi Konishi Figure 1 - Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A thermoformable sheet made by extrusion laminating a thermoformable thermoplastic resin sheet consisting of one layer or multiple layers on one side of a nonwoven fabric.