Patent US5134028A successfully refreshed from Google Patents.
US5134028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester series resin foamed material and production process thereof
Assignee: Sekisui Kaseihin Kogyo KK
•
Filing: 1990-12-26
•
Granted: 1992-07-28
•
Expires: 2010-12-26
Abstract
Abstract A thermoplastic polyester series foamed material having a thickness of at least 3 mm and an apparent density of from 0.05 to 0.7 g/cm<3> is diclosed, wherein the crystallinity of the resin in the surface portion within 0.5 mm from the surface of the foamed material is not more than 30% and at least 1% lower than the crystallinity of the resin in the central portion of the foamed material.
Inventors
- 👤 Motoshige Hayashi
- 👤 Norio Amano
- 👤 Takaaki Hirai
- 👤 Takeshi Taki
- 👤 Masatoshi Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:42
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; B; B29; B29C; B29C44/00; B29C44/20; B29C44/22; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; B29C48/914; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B29K; B29K2105/00; B29K2105/06; B29K2105/12; C08J2367/00; C08J2367/02; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A thermoplastic polyester series foamed material having a thickness of at least 3 mm and an apparent density of from 0.05 to 0.7 g/cm 3 , wherein the crystallinity of the resin in the surface portion within 0.5 mm from the surface of the foamed material is not more than 30% and at least 1% lower than the crystallinity of the resin in the central portion of the foamed material.
Claim 2
Dependent Claim
70 words
A thermoplastic polyester series foamed material having a thickness of at least 3 mm and an apparent density of from 0.05 to 0.7 g/cm 3 , wherein the crystallinity of the resin in the surface portion within 0.5 mm from the surface of the foamed material is not more than 30% and at least 1% lower than the crystallinity of the resin in the central portion of the foamed material.
Claim 3
Dependent Claim
22 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the whole mean crystallinity thereof is from 15 to 50%.
Claim 4
Dependent Claim
23 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the crystallinity in the surface portion is from 14 to 30%.
Claim 5
Dependent Claim
30 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the crystallinity in the surface portion is at least 1.5% lower than the crystallinity in the central portion.
Claim 6
Dependent Claim
24 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the foamed material has a thickness of from 3 to 50 mm.
Claim 7
Dependent Claim
24 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the bending strength thereof is from 50 to 100 kg·f/cm 2 .
Claim 8
Dependent Claim
21 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the nailing strength is from 9.5 to 25.0 kg·f.
Claim 9
Dependent Claim
31 words
The thermoplastic polyester series resin foamed material as in claim 1, wherein the thermoplastic polyester series resin is polyethylene terephthalate, polybutylene terephthalate, a polybutylene terephthalate elastomer, polycyclohexane terephthalate, or polyethylene naphthalate.
References Cited (Backward Citations)
US3299192A
Cited
GB1008137A
Cited
US4224264A
Cited
US4312960A
Cited
JPS5720333A
Cited
US4429060A
Cited
EP0112058A2
Cited
US4462947A
Cited
JPS60155243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |