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Translucent decorative board

a technology of decorative boards and transparent coatings, applied in the field of transparent decorative boards or panes, can solve the problems of relative fragile conventional decorative boards liable to cracks or flaws, unsuitable for use, glass boards and plastic films are relatively difficult to process, etc., to achieve easy and direct coloration, eliminate subsequent printing processes, and excellent mechanical properties

Inactive Publication Date: 2005-07-14
IBIDEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a translucent decorative board that includes a thermoplastic substrate board and thermosetting sheets. The thermosetting sheets are made of a polymer or resin that provides optical transmittance of 10% or greater. The invention has several technical effects, including improved optical transmittance, light resistance, surface hardness, and resistance to flaws. The thermosetting sheets can be made of melamine resin, diallylphthalate resin, unsaturated polyester resin, or polyurethane resin. The invention can be easily bonded together using an adhesive, and can be used in drilling and punching processes without cracking or chipping. The invention also provides a decorative board that looks “colored” or “patterned” when a translucent substrate board is sandwiched by translucent decorative surface sheets.

Problems solved by technology

A relatively fragile conventional decorative board is liable to cracking or flaws and therefore generally unfit for use as a shelf board or table top which requires considerable resistance against physical shocks and / or pressing force.
A relatively solid and sturdy conventional glass board comprising a glass board and a plastic film is relatively hard to process such as cutting and often excessively heavy to handle.
This decorative board material is not sufficiently translucent and thus is not particularly suitable for use against a light source.
However, such a translucent decorative board posed a number of problems.
Some of the major problems are: a) difficulty in controlling colors; b) relatively limited colors as a result of manufacturing restrictions; c) requirement of a large manufacturing plant; d) relatively low productivity; e) unfitness for small quantity production; and f) relatively poor mechanical properties.
Such a conventional decorative board is short of providing “special” effects or satisfactory transparency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1 (

Embodiment 1(7)

[0092] The translucent paper for the decorative cover sheet of Embodiment 1(4) was replaced by conceal paper (PK-130; Kojin Company, 2% ash content).

[0093] The decorative boards of Embodiments 1(6) and 1(7) had surface hardness, flexural strength, flexural modulus, impact resistance, workability and boring performance which were comparable to Embodiment 1(4). However, the optical transmittances of Embodiments 1(6) and 1(7) were respectively only 5% and 15%.

[0094] The “rate of dimensional change” as used in Table 2 was the rate of extension or difference in dimension between the measurements of the subject boards taken after the subject boards were held at 20° C., 40%RH (relative humidity) for 24 hrs. and the subject boards were held at 20° C., 95%RH (relative humidity) for 24 hrs. The “impact resistance” was the measurements of the maximum heights where a steel ball, 28 g, was dropped onto the subject boards without resulting in breaking or cracking of the boards. T...

embodiment 2 (

Embodiment 2(5)

[0107] Two yellowish translucent paper sheets (60 g / m2) having identical printed patterns were impregnated with a diallylphthalate resin (hardening catalyst; B.P.O.; Kawaguchi Yakuhin), which were respectively bonded by thermo-compression means at 20 kg / cm2, 140° C. on the surfaces of a polypropylene board which had been corona discharge treated. This decorative board provided the same illusionary effects as Embodiments 2(1) to 2(4).

[0108] In order to study the advantageous features of Embodiments 2(1) to 2(5) by comparison, Comparisons 2(1), 2(2) and 2(3) were also prepared as follows:

Comparison 2(1)

[0109] A decorative board was prepared according to JP Patent Publication No. 5-39187. A green pattern paper sheet (112 g / m2) containing 34.4 wt % titanic acid and bleached craft paper sheets (each 184 g / m2) containing 4.4 wt % inorganic green pigment were impregnated with a melamine resin up to 55 wt %. The pattern paper sheet and four of the craft paper sheets were b...

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Abstract

A translucent decorative board for use, e.g., as a window pane, light shade, partition or door pane is disclosed. The decorative board is comprised of a translucent substrate board and translucent cover sheets bonded to the surfaces of the substrate board. The substrate board is generally thermoplastic and the decorative cover sheets are thermosetting. The thermosetting sheet may comprise a substrate paper sheet and a thermosetting resin impregnated in the sheet.

Description

FIELD OF THE INVENTION [0001] This invention relates to a translucent decorative board or pane for use, e.g., as a translucent or semitransparent partition panel, table top, door panel, window pane or illuminator screen, e.g., in a restaurant, hotel, department store, hospital, office or house. BACKGROUND OF THE INVENTION [0002] Decorative boards or panels are conventionally used as interior baseboards, wainscots, decoration panels, etc. Conventionally there is a decorative board comprising a plastic (such as acrylic or polyvinyl chloride) substrate and a patterned paper or sheet, which are thermo-compression bonded together. Such conventional boards provide certain optical transmittance and are widely used, e.g., as flooring, ceiling, wall or light shielding materials. There is also a glass board for use, e.g., as a table top or shelf board, comprising a plastic film and a solid or thick (often as thick as 5 mm or over) glass board, which are bonded together. [0003] A relatively fr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B17/06B32B27/06B32B27/08B44C5/04B44F1/06
CPCB32B17/06B32B27/06B32B27/08B44C5/04Y10T428/2915B44C5/0469B44F1/066Y10T428/24612B44C5/0446Y10T442/20Y10T442/2861Y10T442/30Y10T428/249998Y10T428/249926
Inventor OSUMI, SHIROSUGIYAMA, SHIGERUUNO, TAKAHIROYONEYAMA, KAZUO
Owner IBIDEN CO LTD