Patent US3885014A successfully refreshed from Google Patents.
US3885014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fine fiber mass
Assignee: Yupo Corp
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Filing: 1972-05-26
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Granted: 1975-05-20
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Expires: 1992-05-26
Abstract
Abstract Water and a linear polymer in the molten state are kneaded in a high-pressure region to disperse the water minutely and uniformly throughout the polymer, which is then extruded together with supplementary water into a low-pressure region through an orifice, whereby a mass of fine fibers of excellent molecular orientation and rigidity and of hydrophilic character is produced.
Inventors
- 👤 Tadayuki Fukada
- 👤 Isao Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:23
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; D01; D01D; D01D5/00; D01D5/08; D01D5/11; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
11 words
A PROCESS OF PRODUCING A MASS OF FINE FIBERS WHICH COMPRISES:
Claim 2
Dependent Claim
11 words
A PROCESS OF PRODUCING A MASS OF FINE FIBERS WHICH COMPRISES:
Claim 3
Dependent Claim
32 words
INTRODUCING WATER INTO A MASS OF MOLTEN LINEAR WATERINSOLUBLE POLYOLEFIN POLYMER UNDER AN ELEVATED TEMPERATURE AND PRESSURE IN A QUANTITY OF FROM 2 TO 50 PERCENT BY WEIGHT OF THE RESULTING MIXTURE;
Claim 4
Dependent Claim
32 words
INTRODUCING WATER INTO A MASS OF MOLTEN LINEAR WATERINSOLUBLE POLYOLEFIN POLYMER UNDER AN ELEVATED TEMPERATURE AND PRESSURE IN A QUANTITY OF FROM 2 TO 50 PERCENT BY WEIGHT OF THE RESULTING MIXTURE;
Claim 5
Dependent Claim
27 words
KNEADING THE RESULTING MIXTURE WHILE MAINTAINING THE MIXTURE AT AN ELEVATED PRESSURE THEREBY TO PRODUCE A MOLTEN POLYMER MASS WHICH CONTAINS WATER FINELY AND UNIFORMLY DISPERSED THEREIN;
Claim 6
Dependent Claim
27 words
KNEADING THE RESULTING MIXTURE WHILE MAINTAINING THE MIXTURE AT AN ELEVATED PRESSURE THEREBY TO PRODUCE A MOLTEN POLYMER MASS WHICH CONTAINS WATER FINELY AND UNIFORMLY DISPERSED THEREIN;
Claim 7
Dependent Claim
27 words
kneading the resulting mixture while maintaining the mixture at an elevated pressure thereby to produce a molten polymer mass which contains water finely and uniformly dispersed therein;
Claim 8
Dependent Claim
27 words
kneading the resulting mixture while maintaining the mixture at an elevated pressure thereby to produce a molten polymer mass which contains water finely and uniformly dispersed therein;
Claim 9
Dependent Claim
54 words
A process for producing a mass of fine fibers as claimed in claim 1 in which the linear polyolefin polymer is selected from the group consisting of homopolymers and mutual copolymers of ethylene, propylene, and butene-1, copolymers of ethylene, propylene and butene-1 as predominant constitutents with monomers copolymerizable therewith, and mixtures of said polymers.
Claim 10
Dependent Claim
58 words
transferring the resultant molten polymer mass under an elevated temperature and pressure to an orifice with an introduction of supplementary water under an elevated temperature and pressure in a quantity of at least 100 percent by weight of said molten polymer mass produced from step (2) at a part immediately before or just at the orifice; and then
Claim 11
Dependent Claim
58 words
transferring the resultant molten polymer mass under an elevated temperature and pressure to an orifice with an introduction of supplementary water under an elevated temperature and pressure in a quantity of at least 100 percent by weight of said molten polymer mass produced from step (2) at a part immediately before or just at the orifice; and then
Claim 12
Dependent Claim
58 words
TRANSFERRING THE RESULTANT MOLTEN POLYMER MASS UNDER AN ELEVATED TEMPERATURE AND PRESSURE TO AN ORIFICE WITH AN INTRODUCTION OF SUPPLEMENTARY WATER UNDER AN ELEVATED TEMPERATURE AND PRESSURE IN A QUANTITY OF AT LEAST 100 PERCENT BY WEIGHT OF SAID MOLTEN POLYMER MASS PRODUCED FROM STEP (2) AT A PART IMMEDIATELY BEFORE OR JUST AT THE ORIFICE; AND THEN
Claim 13
Dependent Claim
58 words
TRANSFERRING THE RESULTANT MOLTEN POLYMER MASS UNDER AN ELEVATED TEMPERATURE AND PRESSURE TO AN ORIFICE WITH AN INTRODUCTION OF SUPPLEMENTARY WATER UNDER AN ELEVATED TEMPERATURE AND PRESSURE IN A QUANTITY OF AT LEAST 100 PERCENT BY WEIGHT OF SAID MOLTEN POLYMER MASS PRODUCED FROM STEP (2) AT A PART IMMEDIATELY BEFORE OR JUST AT THE ORIFICE; AND THEN
Claim 14
Dependent Claim
59 words
A process for producing a mass of fibers as claimed in claim 1 in which a water-sorption agent is added To said molten linear polyolefin polymer which water-sorption agent is a fine solid selected from the group consisting of nitrates, oxalates, acetates, sulfates, sulfites, carbonates, phosphates, hydroxides, and halides of alkali metals, alkaline earth metals including magnesium and ammonium.
Claim 15
Dependent Claim
36 words
A process for producing a mass of fine fibers as claimed in claim 1 in which a fine water-insoluble solid water-sorption agent is added to the molten linear polyolefin polymer, said water-insoluble solid comprising a silicate.
Claim 16
Dependent Claim
55 words
EXTRUDING THE MIXTURE OF WATER AND MOLTEN POLYMER MASS OBTAINED FROM THE STEP (3) INTO A REGION OF LOWER PRESSURE SO AS TO EVAPORATE THE WATER DISPERSED IN THE MOLTEN POLYMER MASS AND THE SUPPLEMENTARY WATER INTRODUCED INTO THE STEP (3) WHEREBY THE MOLTEN POLYMER MASS IS COOLED AND SUBDIVIDED INTO A MASS OF FIBERS.
Claim 17
Dependent Claim
55 words
EXTRUDING THE MIXTURE OF WATER AND MOLTEN POLYMER MASS OBTAINED FROM THE STEP (3) INTO A REGION OF LOWER PRESSURE SO AS TO EVAPORATE THE WATER DISPERSED IN THE MOLTEN POLYMER MASS AND THE SUPPLEMENTARY WATER INTRODUCED INTO THE STEP (3) WHEREBY THE MOLTEN POLYMER MASS IS COOLED AND SUBDIVIDED INTO A MASS OF FIBERS.
Claim 18
Dependent Claim
55 words
extruding the mixture of water and molten polymer mass obtained from the step (3) into a region of lower pressure so as to evaporate the water dispersed in the molten polymer mass and the supplementary water introduced into the step (3) whereby the molten polymer mass is cooled and subdivided into a mass of fibers.
Claim 19
Dependent Claim
55 words
extruding the mixture of water and molten polymer mass obtained from the step (3) into a region of lower pressure so as to evaporate the water dispersed in the molten polymer mass and the supplementary water introduced into the step (3) whereby the molten polymer mass is cooled and subdivided into a mass of fibers.
Claim 20
Dependent Claim
32 words
A process for producing a mass of fine fibers as claimed in claim 1 in which said water dispersed in said molten linear polyolefin polymer contains a surface active agent dissolved therein.
Claim 21
Dependent Claim
29 words
A process according to claim 3 in which the water-sorption agent is used in an amount of between 10 and 30 percent by weight of the molten polymer mass.
Claim 22
Dependent Claim
19 words
A process according to claim 1 wherein the kneading temperature is above the melting temperature of the molten polymer.
Claim 23
Dependent Claim
28 words
A process according to claim 7 wherein the pressure used during the kneading process is above the saturated steam pressure of the water introduced into the molten polymer.
Claim 24
Dependent Claim
18 words
A process according to claim 1 wherein the pressure used during the kneading process is above 100 kg/cm2.
Claim 25
Dependent Claim
18 words
A process according to claim 1 wherein the pressure used during the kneading process is above 40 kg/cm2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |