US4386042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding of synthetic resin article having a hard coating
Assignee: Individual
•
Filing: 1981-05-22
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Granted: 1983-05-31
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Expires: 2001-05-22
Abstract
Abstract Molded product and method for providing a desired surface-hardness for its surface by means of a simple molding technique through several steps comprising the cutting of a thermoplastic film or sheet to the same form as the exterior form of the product, the placing of the cut piece on a mold-cavity surface, and the injecting of a molten resin for formation of the product into the mold cavity under a high pressure. The thermoplastic film or sheet is subjected, in advance, to a hard-coating treatment on its surface and a curing treatment to cure the agent thereon thereby forming a hard-coating layer on the surface of the product.
Inventors
- 👤 Akinori Tatebayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:21
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14778; B29C45/14811; B29D; B29D11/00; B29D11/0073
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
A method for preparation of a molded product having a desired surface-hardness on its surface, comprising: (1) cutting a polycarbonate film or sheet into substantially the same form as or similar form to the exterior shape, to be hard-coated thereon, of the synthetic resin molded product; the film or sheet having a silane derivative or acrylic resin derivative hard-coating layer on its surface; (2) placing the cut piece of the polycarbonate film or sheet on a cavity surface of the mold for making the molded-product; (3) injecting under a high pressure a molten thermoplastic resin for the formation of the molded product from an injection molding means into the cavity by means of a high pressure injection molding technique; and (4) removing the molded product from the mold as a final product having the desired surface-hardness.
Claim 2
Independent Claim
136 words
A method for preparation of a molded product having a desired surface-hardness on its surface, comprising: (1) cutting a polycarbonate film or sheet into substantially the same form as or similar form to the exterior shape, to be hard-coated thereon, of the synthetic resin molded product; the film or sheet having a silane derivative or acrylic resin derivative hard-coating layer on its surface; (2) placing the cut piece of the polycarbonate film or sheet on a cavity surface of the mold for making the molded-product; (3) injecting under a high pressure a molten thermoplastic resin for the formation of the molded product from an injection molding means into the cavity by means of a high pressure injection molding technique; and (4) removing the molded product from the mold as a final product having the desired surface-hardness.
Claim 3
Dependent Claim
41 words
A method as in claim 1, wherein, in step (2), the cut piece is placed on the cavity surface in a manner such that its surface having the hard-coating layer thereon results in the exterior surface of the synthetic resin molded-product.
Claim 4
Dependent Claim
44 words
A method as in claim 1, wherein, in step (2), the cut pieces are placed on the cavity surface in a manner such that each hard-coating layer on the cut pieces corresponds to the exterior or the interior surface of the synthetic resin molded-product.
Claim 5
Dependent Claim
122 words
A method as in claim 1, wherein the polycarbonate film or sheet having a silane derivative hard-coating layer on its surface is prepared by: (1) providing the polycarbonate film or sheet of a desired thickness by means of an extrusion molding-technique; (2) subjecting the polycarbonate film or sheet to a surface-treatment; (3) subjecting the surface of the polycarbonate film or sheet to a pre-coating treatment so as to apply an undercoating agent of acryl derivative thereto; (4) coating the pre-treated surface of the polycarbonate film or sheet with a silane derivative hard-coating; and (5) subjecting the silane derivative hard-coating on the surface of the polycarbonate film or sheet to a curing treatment so as to form the silane derivative hard-coating layer thereon.
Claim 6
Dependent Claim
34 words
A method as in claim 4, further including off-loading the film or sheet onto a roll whereby dust or other particles can be prevented from adhering to the surface of the film or sheet.
Claim 7
Dependent Claim
24 words
A method as in claim 1, wherein the molded product is colored by adding a desired coloring material into the polycarbonate film or sheet.
Claim 8
Dependent Claim
27 words
A method as in claim 1, wherein the molded product has ultraviolet ray absorption-properties provided by mixing an ultraviolet ray absorption-material into the polycarbonate film or sheet.
Claim 9
Dependent Claim
22 words
A method as in claim 1, wherein the molded product is made from the same material as the polycarbonate film or sheet.
Claim 10
Dependent Claim
18 words
A method as in claim 1, wherein the molded-product materials are different from polycarbonate film or sheet materials.
Claim 11
Dependent Claim
100 words
A method as in claim 1, wherein the polycarbonate film or sheet having an acrylic resin derivative hard-coating layer on its surface is prepared by: (1) providing the polycarbonate film or sheet of a desired thickness by means of an extrusion molding-technique; (2) subjecting the film or sheet to a surface-treatment; (3) coating the pre-treated surface of the film or sheet with an acrylic resin derivative hard coating; and (4) subjecting the acrylic resin derivative hard coating on the surface of the film or sheet to a curing treatment so as to form the acrylic resin derivative hard-coating layer thereon.
Claim 12
Dependent Claim
34 words
A method as in claim 10, further including off-loading the film or sheet onto a roll whereby dust or other particles can be prevented from adhering to the surface of the film or sheet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |