JPS63182141A - Molded form consisting of fiber laminate - 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 molded article made of a fiber laminate.

Applications of molded products include luggage such as suitcases and attache cases, VTRs, cameras, binoculars, telescopes, musical instruments,
Examples include cases for measuring instruments, interior products, and car interior products.

(Prior art) Conventionally, fabric and plastic sheets, etc. are laminated, or the back side of the fabric is coated with plastic to form a composite sheet, and this composite sheet is integrally fused to produce three-dimensional molded products with various curved surfaces. has been done. However, due to the fact that it cannot be stretched sufficiently due to the curved surface, there are drawbacks such as cracking in some corners or molded parts with large curvature, and the background being visible through. ing. for example,
In JP-A-48-87161, an extensible woven fabric is laminated on a thermoformable polymer sheet substrate. Furthermore, in Japanese Patent Publication No. 60-40537, when using a composite sheet by laminating a molding fabric and a plastic sheet or subbing Zo2snax on the back side of the fabric, the back side of the fabric is mainly used as the molding fabric. Using a fabric containing fibers having a softening point of 80 to 220°C and a cutting elongation of 50% or more, the surface portion of which is mainly composed of high softening point fibers B having a softening point higher than fiber A by 720°C or more, Here are some examples of attempts to solve the above drawbacks. However, when the curvature of the curved part of the molded article is large, even if it does not tear, the spacing between the knitted structures of the fabric in the curved part is larger than that in the flat part, resulting in an uneven appearance that impairs marketability. there were.

Furthermore, conventional plastic molded products were hard to the touch and felt cold to the touch.

(Problems to be Solved by the Invention) In view of the above-mentioned current state of technology, it is possible to obtain uniformity in the spacing between the knitted structures of the fabric on the curved surface part of a three-dimensional molded product, especially a molded product having a curved surface with a large curvature, and to meet the requirements. Accordingly, the purpose is to provide a molded product that has a soft texture when touched by the body, or that does not deform due to stored items.

(Means for Solving the Problems) The present inventors conducted extensive research in order to obtain a laminate for three-dimensional molding without the above-mentioned drawbacks, and as a result, they arrived at the laminate of the present invention.

That is, the present invention is a molded product made of a fiber laminate obtained by laminating a polyurethane film on the upper part of a two-dimensional stretchable fabric and a foam on the lower part of the fabric.

Here, the upper part refers to the front side of the molded product, and the lower part refers to the inside of the molded product.

The laminate of the present invention comprises an elastic polyurethane film and two
Since the fabric is laminated with dimensional extensibility, it has sufficient extensibility under the molding conditions, and even in three-dimensional molded products with curved surfaces with large curvature, it has an excellent appearance without peeling or deformation between the laminated layers. An integrally molded product is obtained.

In addition, the polyurethane film constituting the upper part of the laminate not only distributes the stress evenly throughout the laminate even when the expansion magnification is large, but also has a knitted structure of the fabric that has two-dimensional extensibility. The raised film surface gives an excellent aesthetic sense that combines the feel of plastic with the feel of cloth.

If a foam with a high expansion ratio is used as the foam constituting the lower part of the laminate, a flexible molded product will be obtained, whereas a rigid molded product will be obtained if a foam with a low expansion ratio is used.

To explain the molding laminate of the present invention in more detail, the polyurethane film may include polymer diols such as polyester diol, polyether diol, and polycarzenate diol. An example is a film produced from a polyurethane elastomer obtained by reacting reinocyanate, a low-molecular chain extender, and a low-molecular end stopper.

Fabrics with two-dimensional extensibility include I-reami P fibers such as nylon 6 and nylon 66, or two-way tricot knitted using polyester fibers and polyether-based polyurethane elastic fibers, or preester-based polyurethane elastic fibers. Examples include knitted fabrics, nine-knitted fabrics, nine-silk fabrics obtained by knitting stretchable processed yarns, and textiles woven using yarns that are stretchable in the warp and/or weft. .

Foams obtained by the gas mixing method/IJ vinyl chloride shells are classified by manufacturing method, and foams obtained by the blowing agent decomposition method include radiation crosslinked polyethylene and chemically crosslinked polyethylene obtained by the normal pressure foaming method. , radiation crosslinking? Repropi4ren,? Polychloride pure is used as a material, ethylene, polypropylene, polyvinyl chloride obtained by extrusion foaming method, polyethylene, polypropylene, previnyl chloride (Klebar method) obtained by press foaming method, hard TM are used. Examples include various thermoplastic resins obtained by the injection foaming method.

Foams obtained by the solvent aeration method include in-mold foaming polystyrene (bead method), extrusion foaming polyethylene, I-restyrene various thermoplastic resins (celka method), and niboxy resin obtained by the two-component mixing method. , phenolic resin, and area resin.

Foams obtained by chemical reaction methods include hard and soft polyurethanes. Among these foams, foams having a desired expansion ratio can be used alone or in a stacked manner.

In addition, a foam with a low expansion ratio is used to prevent deformation after the laminate is molded. , polystyrene, and low-foam thermoplastic resins such as BS, integral skin foam of polyurethane, and low-foam foams such as syntactic 7 ohm, which is made by hardening hollow glass or plastic microspheres with thermosetting resin. Thermosetting resins are mentioned as an example.

Lamination of a polyurethane film, a two-dimensional extensible fabric, and a foam is usually performed by bonding the polyurethane film with an adhesive.

As the adhesive, one is used that has a high affinity with the urethane film and the fabric foam having two-dimensional extensibility and has sufficient adhesive strength.1. IIJ urethane adhesive vinyl adhesive, calxyl group-modified olefin resin, calxyl modified synthetic vinyl, copolymerized polyamide P
Resin, copolymerized polyester resin, vinyl chloride resin, α-
Examples include, but are not limited to, olefin/vinyl acetate copolymer resins.

In addition, the urethane film, foam, adhesive, and polyurethane elastic thread may contain additives, flame retardants, antistatic agents, inorganic fillers, light stabilizers, antioxidants, gas-resistant stabilizers,
Antifungal agents and adhesion improvers can be added.

(Example) The present invention will be explained below with reference to Examples.

Example 1 Dissolved in a mixed solvent consisting of methyl ethyl ketone/dimethylformamide/toluene.

A polyether polyurethane having a softening point of 140 to 150° C. was cast onto release paper and dried to form a film having a thickness of 15 μm.

50 denier nylon 6.6tI1. A two-way tricot knitted structure was knitted using fiber and 40 denier polyether polyurethane elastic fiber.

Thickness 3II as a foam! Im's Bell Pollen (manufactured by Maruto Kasei) with a foaming ratio of 1.2 was used.

The polyurethane film and two-way tricot were glued together, followed by the foam.

Using Rosay as the adhesive, apply 150 to 20,017 m of adhesive to each bonding surface using an air spray gun.
After being left for 3 to 5 minutes, the positions were determined, the sheets were pasted together and pressed.

After heating the laminate obtained as above to 140°C,
A molded article having the shape shown in FIG. 1 was obtained by vacuum forming. The expansion magnification was an average of 200% and a maximum of 300%.

There was no tearing in the areas with large curvature of the obtained molded product, the stitch spacing was uniform, and it felt good to the touch, indicating a high-quality finished product. I also put bulky items in a case made using two of these molded objects, but it did not swell.

Example 2 A laminate was produced by the method of Example 1, with the type of polyurethane film, the type of urethane elastic yarn used for the two-way tricot, and the type of foam changed as shown in Table 1, and vacuum molded after heating.

Margin Comparative Example A laminate was made using the same two-way tricont knitted fabric as in Example 1 and the same foam (4-thickness Verderen).

This was completed under the same heating and vacuum forming conditions as in Example 1.

As a result, the opening of the stitches becomes noticeable in areas with large curvature,
The lower layer of foam was visible, detracting from the quality of the product.

Example 3 A polyether-based noriurethane film having a thickness of 15 μm was prepared in the same manner as in Example 1. Next, a two-way tricot knitted fabric was prepared using 1c50 denier polyester fiber and 40 denier polyether polyurethane elastic fiber. As a foam, polyethylene foam (FOAM ACE manufactured by Furukawa Electric) with a foaming ratio of 10 times and a thickness of 4 mm is used.
Foaming ratio 1.2 times) JEX Mi3 RTM? Prepare polyethylene foam (manufactured by Ver-Iren Malto Kasei) and adhere it in the same manner as in Example 1 in the following order: polyurethane film, two-way tricot knit foam with a foaming ratio of 10 times, and foam with a foaming ratio of 1.2 times. It was made into a laminate.

This fiber laminate was heated to 180°C and vacuum formed to form a second
A molded product having the shape shown in the figure was obtained.

The average expansion magnification was 200% and the maximum was 280%.

A case was made by sewing this molded product. The obtained product has an excellent appearance, has no tears in areas with large curvature, has no openings in the two-way tricot stitches, and has a soft feel to the touch. The case itself was sturdy and did not bulge even when overfilled with contents.

[Brief explanation of the drawing]

FIG. 1 shows the shape of the molded product according to Example 1, (,) is a plan view, and (b) is a side sectional view. Figure 2 shows the shape of the molded product according to Example 3, (a) is a plan view, (b)
is a side sectional view. Pu1: 360th, 12: 320tMischi:l
O Deaf, x4:to. gg, A, 2 450at, 16:
410rtm, ,Q,: 50m, 4:
10g, 1, g: 90+ma, ℃16: 450
ymx, j211:560y+on, 11,2:90m
m, 113: 90rra, 114: 18w11
Patent Applicant Asahi Kasei Koto Co., Ltd. Procedural Amendment (August 1988, Japan Patent Office Commissioner Kunio Ogawa 1, Case Description 1988 Patent Application No. 13973)
No. 2, Name of the invention Molded product made of fiber laminate 3, Relationship with the case of the person making the amendment Patent applicant 1-2-6-4 Dojimahama, Kita-ku, Osaka-shi, Osaka Prefecture ``Detailed explanation'' column,...) A --- Goo 1 1 ♀l , 'y4'', 2.1, & Contents of amendment (1) Between the lines 18 and 19 of page 7 of the specification Insert the following sentence: ``The expansion magnification shown in Table 1 of Examples was determined as follows. Maximum expansion magnification: The fabric to be laminated to the foam was preliminarily coated at 1G intervals in each direction. Draw a line, find the maximum developed area after molding, and calculate the ratio with the area of the corresponding part before molding (formula (B) below). (2) Lines 1 to 2 of page 8 of the specification. Correct "melted. softening point" to "melted softening point". (3) In Table 1 on page 10 of the specification, the small "" will be corrected as follows. (4) On page 11 of the specification, line 3 "Thickness 4 gourd" will be changed to "Thickness 3 m
I am corrected. that's all

Claims (1)

[Claims] A molded product made of a fiber laminate obtained by laminating a polyurethane film on the top of a two-dimensional stretchable fabric and a foam on the bottom of the fabric.