US2853741A - Fibrous article and method of preparing the same from polymeric films - Google Patents
Fibrous article and method of preparing the same from polymeric films Download PDFInfo
- Publication number
- US2853741A US2853741A US432826A US43282654A US2853741A US 2853741 A US2853741 A US 2853741A US 432826 A US432826 A US 432826A US 43282654 A US43282654 A US 43282654A US 2853741 A US2853741 A US 2853741A
- Authority
- US
- United States
- Prior art keywords
- film
- fibers
- films
- fibrous article
- preparing
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
- D01D5/423—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by fibrillation of films or filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G99/00—Subject matter not provided for in other groups of this subclass
-
- 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
- Y10S260/00—Chemistry of carbon compounds
- Y10S260/41—Glass flake
-
- 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
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/47—Processes of splitting film, webs or sheets
-
- 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
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/75—Processes of uniting two or more fibers
Definitions
- the films are conveniently prepared from an aqueous latex of the synthetic polymer. Any polymers whose latexes will form a continuous, self-supporting, orientable film may be employed in making the fibrous articles of liat ented' sept. 30, @958 5 ichloride i's -present in the"fn'ajor proportion. "Useful filiiis staple fibers have a characteristic resiliency and hand :may alsobe cast from :a solution of a polymer inability of many solventsjand the difficult'y i concentrated polymer-solutions, u'siia'lly ntake this precedure .”less attractive "than that using a latex.
- the films are easily prepared from latexes or solutions by casting the latex or solution onto a flat surface and drying the resulting deposit.
- films that are made from crystalline polymers it is necessary to heat the films to a temperature at which the crystallites will melt followed by supercooling the film, and then to stretch the film in one direction to obtain the desired unilateral orientation. After orientation the films may be shredded at any time. Films of non-crystalline polymers may be oriented by stretching them in a heated condition, and the orientation may become set in the film by sudden chilling.
- Fig. 1 shows in diagrammatic side-elevation a preferred embodiment of an apparatus for operating the method
- Fig. 2 is a magnified view of a portion of the fibrous article prepared by the method of this invention.
- FIG. 1 An especially useful device for shredding the films is shown in diagrammatic cross sectionin Fig. 1 of the accompanying drawing.
- the unilaterally oriented film is fed through the nip between a driven revolving brush 10 and a stationary brush 11 positioned so that its bristles barely engage those of the rotary brush 10.
- the revolving brush 10 rotates in the direction of travel of the film 12.
- the pressure between the two brushes that is necessary to produce the partial shredding will depend on several factors, such as the thickness of the film, the degree of orientation, and the stiffness of the brushes. Simple preliminary experiments will carrying out the method of the invention.
- the rate of travel of the film 12 may be controlled by running the film 12 through a pair of driven pinch rolls 13 before being brushed. .A windup roll or other similar collecting device (not shown) may follow the brushes (10, 11) and tension rolls 14, to collect the partially shredded film. It should be understood that the invention is not limited to any particular apparatus, and that the above description represents only a preferred embodiment of a device for However, methods such as turning and slicing, which produce continuous unconnected fibers are not suitable for use in the invention.
- the product which is formed in accordance with the method of this invention is a fibrous article consisting of sketch of a portion of a fibrous article as shown in Fig.
- a film-forming aqueous latex" of a polymer consisting of 97 percent vinylidene chloride and 3 percent acrylonitrile was cast into a continuous film, which, when dried, was about 0.5 mil thick.
- the dried film was heated to about 180 C. and unilaterally stretched to seven times its original length.
- the oriented film was then passed through the nip of a revolving brush and a stationary brush and the pressure between the brushes adjusted so that a fibrous article substantially as described in this specification was formed.
- the continuous tow thus produced was twisted into a yarn, and articles made therefrom had a hand typical of similar articles made from staple fiber yarns, but the individual yarns of v 4' the invention were much stronger than staple fiber yarns of the same composition and denier.
Description
Sept. 30, 1958 J.,E. CC'JSTA ETAL FIBROUS ARTICLE AND METHOD OF PREPARING THE SAME FROM POLYMERIC FILMS Filed May 27, 1954 INVENTO-RS.
Jo/m E. Cos/a L/oyo E. Le/erre Eo'yar M/ L eBaeu'r ATTORNEYS.
'FIBRQUSAR'DICLE ANDMETHQD GHBREPARING THE'SAIWE FRGMIBOLYMERIC FILMS John E. Costa and 'TEdgarWJLe Boeuf, Midland an'd *Iiloyd E. LefeVreQBay City, Mich, assign'orsto The Dow Chemical Company, Midland, Mich.,'a'corporation of Dlaware Application May .27, 19 54,"Serial N0. "432,826
3'Claims. "(Cl- IS-4715) This invention relates to a new fibrous product and to a process for producing the same. 'rMo're )particularly, it relates to such products made from polymeric materials.
The production of zcontinuous "tows has long been a mecessarystep in the production ofyarn .for the-:textile industry. One of the oldest and most common methods employedto produce such tows hasbeen to card amass ofstaplefibers so that the individuaifibers are brought which is highly desirable for articles of wearing apparel. Still another method produces a yarn by extruding or spinning a plurality of continuous fibers, crimping, twisting, and drawing the tow into a yarn. That method is mostly associated with synthetic fibers that have smooth surfaces and even when crimped tend to slide easily past one another. Up to now that method has been useless for producing yarns for wearing apparel because it has been impossibleto achieve a desirable hand, such as that found in yarns made from staple fibers, in yarns spun from continuous fibers. In order to obtain the proper hand it has been necessary to staple the continuous filaments and then carry out all of the usual steps of converting the staple fibers into a continuous tow. Such a method is impractical and costly in operation. It would be desirable to have a method of producing a tow of continuous fibers which could be twisted directly into a yarn having a desirable hand.
It is the principal object of this invention to provide a continuous fibrous or filamentary article from synthetic polymers which may be twisted directly into a yarn having the hand of a yarn made from staple fibers.
It is a further object to provide a process for producing such a fibrous article.
The above and related objects are accomplished by a process whereby an unilaterally oriented film of synthetic polymer is shredded into a continuous tow of fibers, such shredding being only partially complete, so that the individual fibers are physically connected to each other at random intervals. The tow made by this process may be twisted into a yarn without further processing, eliminating several of the operational steps usually required when yarn is prepared from staple fibers. The fibers, being linked to other fibers, show exceptional resistance, to slippage against one another. Yarns produced in accordance with this invention have the same hand as yarns prepared from staple fibers.
The films are conveniently prepared from an aqueous latex of the synthetic polymer. Any polymers whose latexes will form a continuous, self-supporting, orientable film may be employed in making the fibrous articles of liat ented' sept. 30, @958 5 ichloride i's -present in the"fn'ajor proportion. "Useful filiiis staple fibers have a characteristic resiliency and hand :may alsobe cast from :a solution of a polymer inability of many solventsjand the difficult'y i concentrated polymer-solutions, u'siia'lly ntake this precedure ."less attractive "than that using a latex. (dfli'er a mixed into an aqueous phase containing "a many disadvantages, such as the high cost a" 'arrn'g useful films may be formed by-'in'eltextru's'ionof' polymeric bodies.
' The preparation of "lat'ex'es capable bf --for"iriing' films is "old inf-the art. Typically thepolymerizable -teri'als. Bolymerization i's initiated by warming-the ture a and allowing it to proceed "with agitation u'ritil sue fst'antiall-ycomplete.
B efore casting tlie la'te'X i'n'to a fiiin it ma be fne to blend t'herein a thickener. As is well known in the art, some la'texes *will form -films without awakens,
whereas others :require one and simple p'reliminaiy eitperimentswilldetermine if duets-necessary.
The films are easily prepared from latexes or solutions by casting the latex or solution onto a flat surface and drying the resulting deposit.
With those films that are made from crystalline polymers, it is necessary to heat the films to a temperature at which the crystallites will melt followed by supercooling the film, and then to stretch the film in one direction to obtain the desired unilateral orientation. After orientation the films may be shredded at any time. Films of non-crystalline polymers may be oriented by stretching them in a heated condition, and the orientation may become set in the film by sudden chilling.
The operation 'of the method and the article produced thereby will be better understood from the annexed drawings and the following description. In the drawings:
Fig. 1 shows in diagrammatic side-elevation a preferred embodiment of an apparatus for operating the method, and
Fig. 2 is a magnified view of a portion of the fibrous article prepared by the method of this invention.
An especially useful device for shredding the films is shown in diagrammatic cross sectionin Fig. 1 of the accompanying drawing. In that. device the unilaterally oriented film is fed through the nip between a driven revolving brush 10 and a stationary brush 11 positioned so that its bristles barely engage those of the rotary brush 10. The revolving brush 10 rotates in the direction of travel of the film 12. The pressure between the two brushes that is necessary to produce the partial shredding will depend on several factors, such as the thickness of the film, the degree of orientation, and the stiffness of the brushes. Simple preliminary experiments will carrying out the method of the invention.
readily disclose the proper adjustment of the brushes to provide the necessary shredding action. The rate of travel of the film 12 may be controlled by running the film 12 through a pair of driven pinch rolls 13 before being brushed. .A windup roll or other similar collecting device (not shown) may follow the brushes (10, 11) and tension rolls 14, to collect the partially shredded film. It should be understood that the invention is not limited to any particular apparatus, and that the above description represents only a preferred embodiment of a device for However, methods such as turning and slicing, which produce continuous unconnected fibers are not suitable for use in the invention.
The product which is formed in accordance with the method of this invention is a fibrous article consisting of sketch of a portion of a fibrous article as shown in Fig.
2. From this sketch it can "be seen that the long fibers 15 are connected at random intervals at linkage points 16. It can also be seen that the links 16 are a part of ,both of the long fibers 15 which they connect and are not welded, glued, tied, or in any other manner tacked onto the long fibers 15. The latter methods would be time-consuming, expensive, and impractical, and the prod- ',uct produced by such methods would not enjoy the advantages inherent in the product of this invention consisting of a single integral network.
By way of illustration, a film-forming aqueous latex" of a polymer consisting of 97 percent vinylidene chloride and 3 percent acrylonitrile was cast into a continuous film, which, when dried, was about 0.5 mil thick. The dried film was heated to about 180 C. and unilaterally stretched to seven times its original length. The oriented film was then passed through the nip of a revolving brush and a stationary brush and the pressure between the brushes adjusted so that a fibrous article substantially as described in this specification was formed. The continuous tow thus produced was twisted into a yarn, and articles made therefrom had a hand typical of similar articles made from staple fiber yarns, but the individual yarns of v 4' the invention were much stronger than staple fiber yarns of the same composition and denier.
We claim:
L'The method of producing an interconnected fibrous article from a film of a normally crystalline polymer comprising the steps of supercooling said film, orienting said supercooled film unilaterally, and shredding said oriented film an amount sufiicient to break the film into a coherent longitudinally fibrillated fibrous web, the fibroid segments forming said web being in random association but insufficicnt tosseparate the fiber segments forming said web from one another.
2. The method as claimed in claim 1 wherein the film is one cast from an aqueous latex of a polymer.
3. The method as claimed in claim 1 wherein the shredding consists of passing the film between a revolving brush and a stationary brush whose bristles engage slightly with those of the revolving brush.
References Cited in the file of this patent UNITED STATES PATENTS
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US432826A US2853741A (en) | 1954-05-27 | 1954-05-27 | Fibrous article and method of preparing the same from polymeric films |
US713672A US2980982A (en) | 1954-05-27 | 1958-02-06 | Fibrous article |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US432826A US2853741A (en) | 1954-05-27 | 1954-05-27 | Fibrous article and method of preparing the same from polymeric films |
Publications (1)
Publication Number | Publication Date |
---|---|
US2853741A true US2853741A (en) | 1958-09-30 |
Family
ID=23717743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US432826A Expired - Lifetime US2853741A (en) | 1954-05-27 | 1954-05-27 | Fibrous article and method of preparing the same from polymeric films |
Country Status (1)
Country | Link |
---|---|
US (1) | US2853741A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3003304A (en) * | 1955-10-31 | 1961-10-10 | Rasmussen Ole-Bendt | Method of manufacturing non-woven fabrics and yarns |
US3063126A (en) * | 1958-06-03 | 1962-11-13 | Celanese Corp | Method for treating continuous filament fabrics |
US3081519A (en) * | 1962-01-31 | 1963-03-19 | Fibrillated strand | |
US3096563A (en) * | 1959-06-18 | 1963-07-09 | Du Pont | Novel fabric of improved cover and reduced slickness |
US3165563A (en) * | 1959-06-25 | 1965-01-12 | Phillips Petroleum Co | Method for the production of a fibrous material |
US3199284A (en) * | 1962-07-26 | 1965-08-10 | Ernest Seragg & Sons Ltd | Process for making yarn from a thermoplastic strip |
US3242035A (en) * | 1963-10-28 | 1966-03-22 | Du Pont | Fibrillated product |
US3253967A (en) * | 1962-12-18 | 1966-05-31 | Du Pont | Process for producing foam cigarette filters |
US3273329A (en) * | 1963-07-25 | 1966-09-20 | Scragg & Sons | Textile yarns |
US3294300A (en) * | 1965-06-07 | 1966-12-27 | Eastman Kodak Co | Funnel device for longitudinally splitting film |
US3302501A (en) * | 1965-09-24 | 1967-02-07 | Phillips Petroleum Co | Method of fibrillating plastic film by passing the film through rotating piercing means |
US3398220A (en) * | 1964-06-26 | 1968-08-20 | Parker Pace Corp | Process for converting a web of synthetic material into bulk yarns |
US3416299A (en) * | 1965-01-18 | 1968-12-17 | Phillips Petroleum Co | Pile fabrics from nonwoven fabrics |
US3474611A (en) * | 1966-09-05 | 1969-10-28 | Mitsubishi Heavy Ind Ltd | Method of making fibrous yarns and apparatus therefor |
US3496259A (en) * | 1968-05-03 | 1970-02-17 | Chevron Res | Process for preparing fibrous web |
US3496260A (en) * | 1966-03-31 | 1970-02-17 | Chevron Res | Method for producing fibrous web from polymer film |
US3503836A (en) * | 1963-08-10 | 1970-03-31 | Rasmussen O B | Split fibrous sheet and method for making the same |
US3641760A (en) * | 1969-03-07 | 1972-02-15 | Celanese Corp | Foam fibrillated yarn and process |
DE1660552A1 (en) * | 1964-03-16 | 1972-04-06 | Plasticisers Ltd | Yarn, cord or cord and the process for making these products |
US3693851A (en) * | 1965-06-05 | 1972-09-26 | Polymer Processing Res Inst | Method for fibrillating stretched film |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2238422A (en) * | 1938-06-28 | 1941-04-15 | Exploitatie Mij Marcin & Co N | Glareproof blind made of paper or similar material |
US2459804A (en) * | 1942-08-01 | 1949-01-25 | American Viscose Corp | Shaped felted structures |
US2464746A (en) * | 1946-10-17 | 1949-03-15 | Gering Products Inc | Method of manufacturing thermoplastic pellets |
US2516295A (en) * | 1946-08-09 | 1950-07-25 | Pennsylvania Crusher Co | Process for preparing homogeneously partially polymerized particles of thermosetting material |
US2578523A (en) * | 1950-06-30 | 1951-12-11 | Du Pont | Polytetrafluoroethylene packing material and process for making same |
US2728950A (en) * | 1954-05-06 | 1956-01-03 | Dow Chemical Co | Process for producing fibers from films of polymeric materials |
-
1954
- 1954-05-27 US US432826A patent/US2853741A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2238422A (en) * | 1938-06-28 | 1941-04-15 | Exploitatie Mij Marcin & Co N | Glareproof blind made of paper or similar material |
US2459804A (en) * | 1942-08-01 | 1949-01-25 | American Viscose Corp | Shaped felted structures |
US2516295A (en) * | 1946-08-09 | 1950-07-25 | Pennsylvania Crusher Co | Process for preparing homogeneously partially polymerized particles of thermosetting material |
US2464746A (en) * | 1946-10-17 | 1949-03-15 | Gering Products Inc | Method of manufacturing thermoplastic pellets |
US2578523A (en) * | 1950-06-30 | 1951-12-11 | Du Pont | Polytetrafluoroethylene packing material and process for making same |
US2728950A (en) * | 1954-05-06 | 1956-01-03 | Dow Chemical Co | Process for producing fibers from films of polymeric materials |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3003304A (en) * | 1955-10-31 | 1961-10-10 | Rasmussen Ole-Bendt | Method of manufacturing non-woven fabrics and yarns |
US3063126A (en) * | 1958-06-03 | 1962-11-13 | Celanese Corp | Method for treating continuous filament fabrics |
US3096563A (en) * | 1959-06-18 | 1963-07-09 | Du Pont | Novel fabric of improved cover and reduced slickness |
US3165563A (en) * | 1959-06-25 | 1965-01-12 | Phillips Petroleum Co | Method for the production of a fibrous material |
US3081519A (en) * | 1962-01-31 | 1963-03-19 | Fibrillated strand | |
US3199284A (en) * | 1962-07-26 | 1965-08-10 | Ernest Seragg & Sons Ltd | Process for making yarn from a thermoplastic strip |
US3253967A (en) * | 1962-12-18 | 1966-05-31 | Du Pont | Process for producing foam cigarette filters |
US3273329A (en) * | 1963-07-25 | 1966-09-20 | Scragg & Sons | Textile yarns |
US3503836A (en) * | 1963-08-10 | 1970-03-31 | Rasmussen O B | Split fibrous sheet and method for making the same |
US3242035A (en) * | 1963-10-28 | 1966-03-22 | Du Pont | Fibrillated product |
DE1660552A1 (en) * | 1964-03-16 | 1972-04-06 | Plasticisers Ltd | Yarn, cord or cord and the process for making these products |
US3398220A (en) * | 1964-06-26 | 1968-08-20 | Parker Pace Corp | Process for converting a web of synthetic material into bulk yarns |
US3416299A (en) * | 1965-01-18 | 1968-12-17 | Phillips Petroleum Co | Pile fabrics from nonwoven fabrics |
US3693851A (en) * | 1965-06-05 | 1972-09-26 | Polymer Processing Res Inst | Method for fibrillating stretched film |
US3294300A (en) * | 1965-06-07 | 1966-12-27 | Eastman Kodak Co | Funnel device for longitudinally splitting film |
US3302501A (en) * | 1965-09-24 | 1967-02-07 | Phillips Petroleum Co | Method of fibrillating plastic film by passing the film through rotating piercing means |
US3496260A (en) * | 1966-03-31 | 1970-02-17 | Chevron Res | Method for producing fibrous web from polymer film |
DE1704532B1 (en) * | 1966-03-31 | 1972-05-25 | Chevron Res | PROCESS FOR FIBRILLATING A LENGTH-ORIENTED POLYMER FILM AND DEVICE FOR CARRYING OUT THE PROCESS |
JPS5113770B1 (en) * | 1966-03-31 | 1976-05-04 | ||
US3474611A (en) * | 1966-09-05 | 1969-10-28 | Mitsubishi Heavy Ind Ltd | Method of making fibrous yarns and apparatus therefor |
US3496259A (en) * | 1968-05-03 | 1970-02-17 | Chevron Res | Process for preparing fibrous web |
US3641760A (en) * | 1969-03-07 | 1972-02-15 | Celanese Corp | Foam fibrillated yarn and process |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2853741A (en) | Fibrous article and method of preparing the same from polymeric films | |
US2185789A (en) | Thread and fiber of organic thermoplastic materials and process of producing the same | |
US2980982A (en) | Fibrous article | |
US3496260A (en) | Method for producing fibrous web from polymer film | |
US3852948A (en) | Yarns, tows, and fibers having differential shrinkability | |
Cook | Handbook of textile fibres: man-made fibres | |
US4285100A (en) | Apparatus for stretching a non-woven web or an orientable polymeric material | |
US3500627A (en) | Synthetic textile yarn | |
US3621646A (en) | Composite fibrid yarns and method of manufacture | |
US2917806A (en) | Method for crimping acrylonitrile polymer fibers | |
US2810281A (en) | Textile articles and processes for making same | |
US3398220A (en) | Process for converting a web of synthetic material into bulk yarns | |
US2370112A (en) | Textile material | |
US3724198A (en) | Method for preparing spun yarns | |
US3492389A (en) | Technique for producing synthetic bulk yarns | |
US3981952A (en) | Fibrous materials | |
GB1270935A (en) | Improvements relating to the spinning of textile yarns | |
US4246308A (en) | Curled flock fabric and method for making same | |
US3664115A (en) | Method of making a semi-continuous filament combination yarn | |
US2745240A (en) | Composite filament and staple yarn | |
US3481132A (en) | Textured filament yarns | |
US3470594A (en) | Method of making synthetic textile yarn | |
IL26301A (en) | Process for obtaining vinylic fibers suited for the production of high bulk yarns and corresponding device | |
US3402548A (en) | Process for fracturing flat ribbons and the product thereof | |
US3746608A (en) | Shaped article of synthetic resin having mechanically disordered orientation |