Patent US4844851A successfully refreshed from Google Patents.
US4844851A
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Surface metallizing method
Assignee: Polyplastics Co Ltd
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Filing: 1987-09-28
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Granted: 1989-07-04
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Expires: 2007-09-28
Abstract
Abstract A surface metallizing method for application in producing a metallized polybutylene terephthalate part is conducted by using a molded part consisting chiefly of a polybutylene terephthalate resin composition containing 2-40% by weight of potassium-titanate fiber relative to the total weight of the composition, and subjecting the molded part to sputtering or vacuum metallizing, thereby forming a metallized coat thereon.
Inventors
- 👤 Hiroshi Hotta
- 👤 Yoshiharu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:01
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/20; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/0423; C08J7/043; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
A process for forming a metallized, molded article, comprising injection molding an article from a composition comprising polybutylene terephthalate and 2 to 40 wt. %, based on the total weight of the composition, of needle-shaped, single crystal potassium titanate fibers having an average length of 5 to 50 microns and an average diameter of 0.1 to 0.8 micron and then forming on a surface of the molded article by sputtering, a metal layer having a mirror-like appearance.
Claim 2
Dependent Claim
77 words
A process for forming a metallized, molded article, comprising injection molding an article from a composition comprising polybutylene terephthalate and 2 to 40 wt. %, based on the total weight of the composition, of needle-shaped, single crystal potassium titanate fibers having an average length of 5 to 50 microns and an average diameter of 0.1 to 0.8 micron and then forming on a surface of the molded article by sputtering, a metal layer having a mirror-like appearance.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein the fibers are present in the composition in an amount of from 3 to 30 wt. %, based on the total weight of the composition.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the fibers have an average length of 10 to 20 microns and an average diameter of 0.2 to 0.5 micron.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein an aluminum or chrome alloy layer 100 to 300 angstroms thick is applied by sputtering.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein the composition includes a filler.
Claim 7
Dependent Claim
83 words
The process of claim 5 wherein the filler is selected from the group consisting of calcium carbonate having a mean particle diameter of 4 microns or below, kaolin, kaolinite, sericite having a crystal form of hexagonal plate with a mean particle diameter of 0.1 to 0.3 micron, wollastonite having a block shape of 10 microns or below in mean particle diameter and processed mineral fiber having a mean fiber length of 4 to 6 microns and an aspect ratio of 40 to 60.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the composition includes an additional thermoplastic resin.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the additional thermoplastic resin is polyethylene terephthalate.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |