UST886003I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST886003I4 UST886003I4 US886003DH UST886003I4 US T886003 I4 UST886003 I4 US T886003I4 US 886003D H US886003D H US 886003DH US T886003 I4 UST886003 I4 US T886003I4
- Authority
- US
- United States
- Prior art keywords
- foam
- thickness
- temperature
- density
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
- B29C44/5636—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching with the addition of heat
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S521/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S521/918—Physical aftertreatment of a cellular product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249976—Voids specified as closed
Definitions
- thermoplastic closed cell foam structures by:
- T is the desired minimum thickness
- A is the density of the foam prior to treatment
- B is initial nominal thickness of the foam
- C is the density of the unfoamed polymer
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
PROCESS FOR THE TREATMENT OF THERMOPLASTIC CLOSED CELL FOAM STRUCTURES BY: (A) HEATING THE STRUCTURE TO AT LEAST THE SECOND ORDER TRANSITION TEMPERATURE OF THE FOAM AND BELOW THE TEMPERATURE AT WHICH THE FOAM UNDERGOES CELLULAR COLLAPSE, (B) COMPRESSING THE FOAM STRUCTURE TO A THICKNESS LESS THAN THE NOMINAL THICKNESS OF THE FOAM STRUCTURE AND GREATER THAN THE THICKNESS DETERMINED ACCORDING TO THE FORMULA:
T=AB/C
WHEREIN T IS THE DESIRED MINIMUM THICKNESS, A IS THE DENSITY OF THE FOAM PRIOR TO TREATMENT, B IS INITIAL NOMINAL THICKNESS OF THE FOAM, AND C IS THE DENSITY OF THE UNFOAMED POLYMER, AND 7C) EXPANDING THE FOAM STRUCTURE SUBSTANTIALLY FREE FROM RESTRAINT UNTIL THE TEMPERATURE OF THE FOAM STRUCTURE IS BELOW THE SECOND ORDER TRANSITION TEMPERATURE.
T=AB/C
WHEREIN T IS THE DESIRED MINIMUM THICKNESS, A IS THE DENSITY OF THE FOAM PRIOR TO TREATMENT, B IS INITIAL NOMINAL THICKNESS OF THE FOAM, AND C IS THE DENSITY OF THE UNFOAMED POLYMER, AND 7C) EXPANDING THE FOAM STRUCTURE SUBSTANTIALLY FREE FROM RESTRAINT UNTIL THE TEMPERATURE OF THE FOAM STRUCTURE IS BELOW THE SECOND ORDER TRANSITION TEMPERATURE.
Description
DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED MAY 4, 1971 T886,003 GAUGE CONTROL OF FOAM STRUCTURES Leon Edward Wolinski, Bufialo, N.Y., assignor to E. I. du
Pont de Nemours and Company, Wilmington, Del.
Filed Sept. 26, 1969, Ser. No. 861,477
Int. Cl. B29d 27/00; B32b 5/18; C08f 7/04 US. Cl. 264-51 No Drawing. 12 Pages Specification Process for the treatment of thermoplastic closed cell foam structures by:
(a) Heating the structure to at least the second order transition temperature of the foam and below the temperature at which the foam undergoes cellular collapse,
(b) Compressing the foam structure to a thickness less than the nominal thickness of the foam structure and greater than the thickness determined according to the formula:
wherein T is the desired minimum thickness, A is the density of the foam prior to treatment, B is initial nominal thickness of the foam, and C is the density of the unfoamed polymer, and
(c) Expanding the foam structure substantially free from restraint until the temperature of the foam structure is below the second order transition temperature.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86147769A | 1969-09-26 | 1969-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST886003I4 true UST886003I4 (en) | 1971-05-04 |
Family
ID=25335913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US886003D Pending UST886003I4 (en) | 1969-09-26 | 1969-09-26 | Defensive publication |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST886003I4 (en) |
-
1969
- 1969-09-26 US US886003D patent/UST886003I4/en active Pending
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