JPH05505656A - Spinning method of high molecular weight polyethylene fiber and spun fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Spinning method of high molecular weight polyethylene fiber and spun fiber The present invention provides a method for spinning high molecular weight polyethylene fiber The present invention relates to spinning fibers into yarn and the resulting spun yarn.

More specifically, the present invention is directed to the use of high molecular weight polyethylene staple fibers. Spinning and modification of conventional spinning technology necessary for spinning high molecular weight polyethylene fibers. Regarding weirdness.

2. Prior art Spinning staple (discrete length) fibers has been practiced for centuries.

Natural fibers have discrete lengths and must be spun to form continuous yarns. .

Synthetic continuous filament fibers can be converted into stable fibers for various reasons. It is spun. One reason for this is to improve the feel and appearance of the yarn. Ru.

Another reason is that this spinning method allows the use of fibers that would have previously been discarded. The objective is to manufacture good-quality rings at a lower cost.

By solution spinning like high strength polyethylene fiber SPECTR Since the appearance of manufactured high molecular weight polyethylene continuous filament fibers, Continuous filament fibers are cut into staples and their stable fibers are It was only a matter of time before attempts were made to spin it into yarn. try it However, the fiber batt is slippery and the normal feed roll does not touch the card. Unable to move, it was impossible to spin wool. Furthermore, this slippery Even if attempts are made to overcome the problem by crimping the fibers, the fibers will remain crimped. It was found that there was no Another reason why we tried crimping was because high-strength polyethylene fiber Contrary to experience with other fibers, fibers are typically compressed during the spinning process. It did not try to return to its original state due to its elasticity. Until the present invention , this problem was not resolved.

The present invention was developed in an attempt to overcome these problems.

The present invention enables blending of high molecular weight polyethylene fibers with discontinuous lengths and this fiber length. A spun yarn containing a sufficient amount of discrete lengths of other fibers to

The preferred molecular weight of polyethylene is about 300,000 or more, and about 500,000 or more. The above molecular weights are more preferred.

Other suitable fibers are those with memory. Memory is the original shape after deformation. means the ability to return to For example, if you straighten a pre-crimped fiber, it will return to its original shape. It will return to its contracted state.

Suitable other fibers have a fineness per filament of 20 denier or less, It is more preferable that it is 3 or less.

The preferred discontinuous length of polyethylene fibers and other fibers is approximately 35.6 cm (14 inches). ) and within the range of approximately 1.9 to 35.6 cm ((175 to 14 inches) More preferably, the discontinuous length is .

Preferably, the polyethylene fibers account for about 5 to 95% by weight of the spun fibers. and more preferably about 5 to 60% by weight.

The ultimate elongation of the polyethylene fibers is preferably less than about 8% in a greenhouse, and about 2 to More preferably, it is between 4.5% and 4.5%. Fibers per filament of polyethylene fiber The degree is preferably 20 denier or less, more preferably about 1 to 15, About 1 to 10 is most preferred. The fineness per filament of polyethylene fiber is Approximately 1 to 3 deniers are preferred for early summer.

Other suitable fibers include polyester fibers, polyamide fibers, cotton fibers, wool fibers, and lace fibers. Yon fiber, polypropylene fiber, aramid fiber, low molecular weight polyethylene fiber, charcoal selected from the group consisting of plain fibers and mixtures thereof.

The other fibers preferably account for about 5 to 95% by weight of the spun fibers, and have a memory The fineness per filament is about 20 denier or less, and the discontinuous length is about Preferably, the length is less than or equal to 35.6 cm (1.4 inches).

Preferably, the polyethylene fibers account for about 5 to 95% by weight of the spun fibers. The elongation at room temperature is approximately 8% or less, and the fiber density per filament is approximately 20 denier. or less, with a discontinuous length of approximately 35.6 cm (14 inches) or less Preferably.

Other fibers or aramid fibers that account for less than 50% by weight of the spun fibers are suitable for

This preferred aramid fiber is poly(p-phenylene terephthalamide). be.

The cost of blended yarns can be lowered by using other fibers that are less expensive.

The present invention relates to articles made from spun yarns of the aforementioned spun fibers, preferably aramid Articles made from about 50% spun fibers are also included.

The present invention involves blending a sufficient amount of other fibers of discontinuous length to enable blending of the fiber length. A method of spinning discontinuous length high molecular weight polyethylene fibers is included.

Preferred and more preferred molecular weights of polyethylene include blend weight percent, fiber weight , other fiber types, preferred values for elongation, etc., as well as further preferred values, as described above. be.

The present invention provides fiber batts of high molecular weight polyethylene fibers of about 50 weight percent or more. (fiber bat). The rotating means rotates while in contact with the fiber batt. a surface, the surface moving when the bat contacts the rotating surface; at least partially in the lateral direction to increase the friction between its surface and the fiber batt modified or applied.

This surface can be applied laterally to said part by applying adhesive laterally to said part. Attach double-backed tape to the Fabrics (e.g. WeLcro tape or Emory cloth (E+*ory cl It is preferable that the modification be made by pasting oth) on the portion.

This surface should be sandpapered with a roughness of 800 grit or rougher. It can also be modified by roughening the surface with par.

Brief description of the drawing FIG. 1 is a conceptual diagram of a prior art cotton spinning process for producing sliver.

FIG. 2 is a detailed view of the card of FIG.

FIG. 3 is a detailed view of the supply to the card, and to the lickerin. The figure emphasizes the state of supply.

FIG. 4 is a detailed view of the modified supply roll 23.

FIG. 5 shows various drawings of the trumpet 21.

FIG. 5A is a diagram of a prior art trumpet shown in cross-section in FIG. 5B; 50 is a cross section of a modified trumpet, with the opening at the exit enlarged. shows.

FIG. 5D is an end view.

Detailed description of the invention In the figures, like numbers indicate like devices. The process shown in the figure is used in the following example. It is a cotton yarn spinning system. Learn more about this system If you want to know more, Marvin (John Ll [arvio), textile] Textile Processing Volume 1 (1973) -South Carolina State Department of Education Office of Occupational Education (South Caro lina 5tate Dept, of Education 0ffice of Vocat weir B Textile: Fib er to Fabric) (1975) - McGraw-Hill Co. -Hill Inc-) '1jE3 Chapter, pages 35-71.

In FIG. 4, a discontinuous fiber length, that is, a staple is Place it on the surface. Inside each hopper 11, individual fiber clumps are transferred to a transport apron with needles. (spiked conveying apron) (not shown) The hair is crushed into tufts, and the hair tufts are transferred to a conveyor belt 1 using a conveyor apron with needles. 2 and mixed with the fiber tufts from other hoppers 11. Next, this mix The composite fiber is fed by a conveyor belt 12 to a mixing device 13 where it is further reduced in size. Crush and further mix.

The fibers pass from the device 13 through the pipe 15 to the air system Air via the flow device ffhitin Axi-Flo Unit) 14 It is conveyed to the formula distributor 16. The distributor 16 further opens the fiber mass to make it fluffy. After weighing the fibers, the fibers are weighed and transferred to CMC even feed device 1. 7, and the CMC even feed device 17 Start forming the fiber batt 35 from fiber wrap (referred to as fiber 1ap) do. Please refer to FIGS. 1, 2, 3 and 5. The fiber batt 35 is a feed roll It is supplied to the Rickerin 22 via a feed plate 37 connected to the 23.

The Rickerin 22 has a plurality of wires 50 (clothes (ca. rd cloth)), and the loose fibers are pulled from the batt 35 and lined up. Then transfer it to the clothing 50 that covers the card cylinder 33, and place it on the carding plate or is further oriented by the flat 25 and manipulated (brushing/combing).

The dossier 30 is also covered with clothing and has an accumulation of oriented fibers from the card 18. The sheet is removed and the fibrous sheet is transported to a removal point. at the take-out point can be taken out with a comb 28. Then trumpet this fiber sheet 21, the trumpet 21 allows the sheet to pass through the circular aperture 54. Make it as thin as possible. Sliver 20 (thinned fiber sheet) has an aperture of 54? It slowly enters the winding can 19 and is loosely wound there.

FIG. 4 shows a modified feed roll 23. This is double-sided adhesive as shown in the figure A tape 52 is spirally wound around the roll 23. like this tape Without adhesives or other surface modifications, high-strength, high-molecular-weight polyethylene When processing cable fibers, it is especially important to use mixtures containing 50% or more of high molecular weight polyethylene. During processing, the feed rolls do not function properly. In other words, such changes If unmodified, the fiber batts will slip and back up to form clumps, thus causing the fibers to spin. Since this is not possible, the machine must be stopped.

Figures 2.3.4 and 5 present the prior art process in more detail, The feed roll 23 and surrounding members are shown in more detail.

FIG. 2 shows a feed plate 37, a card cylinder 33, and a protruding wire 5o. screen 38, Rickerin screen 40, back plate 34, flash The spiral brush 31 and front plate 29 for the seat 25 are shown. calendar roll 27 transfers the sliver 20 from the trumpet 21 to the slotted slot on the holder 26. Transport it to container 19. Clearer 43 is feed roll 23 clean.

The wrap guide 45 guides the wrap to the feed roll 23. Motuto knife 4 8. Cut out the mot (*ote) that accumulates from the plastic wrap.

FIG. 5 shows the trumpet 21 from various angles. Figure 5A is a sketch 5B is a sectional view showing the outlet opening 54, and FIG. 5D is a sectional view showing the outer periphery 55 and the outlet opening 54. 5 is a top view of the trumpet 21 having a mouth 54. FIG. Figure 50 shows the spun fiber of the present invention. FIG. 6 shows the enlarged outlet opening 57 required for fiber production. General discussion below Regarding this, please refer to the above-mentioned Textile Processing Volume 1.

As previously mentioned, high molecular weight polyethylene staples can be fabricated using only the system shown in the drawings. Even if you try to spin bull fiber, the feed roll 23 will not spin the butt 35. Unable to move forward in Rin's direction. Two changes were made. More details later To explain in detail, this fiber is mixed with other fibers, and the feed roll 23 is The surface was modified by wrapping double-sided masking tape in a spiral pattern as shown in the figure.

This double-sided tape rotates while contacting the bat 35 and moves the bat 35 forward. It is. The friction characteristics between the roll surface and the bat 35 are arranged on the feed roll 23. Anything that increases the Even if it spreads over the entire roll axis surface, it is distributed over a part of the roll surface. It may be. For example, Velcro type tape, emery Using Ery cloth, roughened surface, adhesive, double-sided tape, etc. can do.

Trumpet 21 also had other problems. This fiber cannot hold crimps Therefore, after deformation, it does not return to its original state due to spring elasticity. At the aperture 54 of the trumpet 21 When made thinner, the sliver 20 becomes rod-shaped and becomes less likely to sludge. Therefore, Increase the size of the sliver 20: Sliver the sliver to the extent that it can advance slowly. The holes in the trumpet 21 are large enough to reduce or limit compression of the fibers. (See Figure 50). .

Collect the thinned sliver cans and transfer them to the draw machine . In the example, Saco Lowell's 415 drawing machine (fo ur over five draw frame) to draw several individual slides. The mixture was mixed with varnish and drawn to be thinner.

The thinned and mixed sliver cans are then roving ame) for further thinning and a very low level of twist. This sliver is The machine is ready to be wound onto the bobbin, which is the feeder package of the spinning machine. It will be done.

The bobbin is mounted on a spinning machine, preferably a circular spinning machine, where the individual The sliver is finely twisted again and spun into yarn. Then the spun yarn The material is then rolled up for packaging or further processing.

U.S. Pat. No. 4,457,985 generally relates to high molecular weight polyethylene. This is being discussed and I am quoting it. In the case of polyethylene, suitable fibers have a molecular weight of approximately 150°000 or more, preferably about 300,000 or more, more preferably about 50 0.000 or more, and those with a molecular weight of more than about 1 million are most preferred. Ru. Such long chain polyethylene (ECPE) fibers are described in U.S. Pat. ．． No. 394 or U.S. Pat. No. 4.356.138 (these patents are (cited) in solution, or as described in the German Patent Publication. Patent No. 3.004.699 and British Patent No. 2.051.667, As described in U.S. Patent IE 4.551.296 (which also cites these patents) Filaments are spun from the solution to form a gel structure as described above. Main departure The term polyethylene as used in containing modifying units, i.e. comonomers, and one or more polymer additives, such as an alkene-1 polymer, especially low density polyethylene, polypropylene or polypropylene; tyrene, copolymers containing monoolefins as raw monomers, oxidized polyolefins lefins, grafted polyolefin copolymers and polyoxin methylenes, or is widely cited as low molecular weight additives such as lubricants, colorants, fillers and pigments. Exclusively linear polyethylene materials mixed and containing not more than about 50 percent by weight of similar materials means. Depending on the production technology, drawing ratio and drawing temperature, and other conditions, various Properties can be imparted to these filaments. Filament toughness ( tenacity) must be greater than or equal to 8 g/d, with a range of approximately 8 to 45 g/d. 25 to 35 g/d is most preferred. Similarly, filament The tensile modulus of the product is approximately 160 g/min as measured by an Instron tensile tester. d or more, preferably in the range of about 150 to 3300 g/d, and about 1°200 to A range of from 2.500 g/d to 2.500 g/d is most preferred. These tensile modulus and toughness The highest value of is generally achieved by solution grown gel filament process i.e. solution spinning. This can only be achieved by using

The ultimate elongation of this polyethylene fiber in the Instron tensile test was determined at room temperature, i.e. That is, it must be less than 8% at approximately 25°C, and must be within the range of 2 to 4.5%. preferable. The fineness per filament is preferably 20 deniers or less, and 1 to 1. 15 denier is more preferred, 1 to 10 denier, and even 1 to 3 denier. Most preferably. The fineness of this filament fiber is suitable for blending for apparel. It is desirable that it be even smaller. Cordage, rope or heavy woven fabric (heavy fa) Bric), it is better to have a larger filament fiber fineness. .

The amount of polyethylene fibers in the blend ranges from about 5 to 95%, with is preferably about 20 to 80% by weight, and the side fibers are about 5 to 40% by weight. Yes.

The supporting fibers may be any other fibers other than the high molecular weight polyethylene fibers mentioned above. It may be a fiber. Examples of such fibers are found in U.S. Patent Application No. 62,998 ( (filed on July 13, 1987), which is cited here. Some of them are , aramid, cotton, carbon, polyester, polyamide, wool, rayon, polypropylene Includes pyrene, low molecular weight polyethylene, etc.

The supporting fibers preferably have the following characteristics. That is, it has memory and is The fiber must be crimped for a long time: The fineness per filament is suitable for apparel. is 20 denier or less, preferably 0.5 to 3 denier, and is suitable for ropes and cords. For denier and heavy weave use, the denier range is 3 to 20 denier.

The required minimum amount of support fiber is approximately 5% by weight of the spun fibers, with up to 95% by weight being acceptable. Ru. The preferred amount ranges from about 20 to 50% by weight. This amount is polyethylene fiber It is a function of the filament fineness, for example polyethylene with a filament fineness of 20 denier. Approximately 30% by weight of supported fibers is required to spin fibers, and the filament fineness is Less is required for spinning smaller polyethylene fibers.

Both the support fiber and the polyethylene fiber are cotton systems. is approximately 14 inches (356 cm) or less, preferably 2.25 inches (5.72 cm) ) formed from discrete lengths of (1.9 to 5.1 cm (0,75 to 2 inches) h) is more preferred. ) The particular blend of carrier fibers is related to the desired properties of the spun fibers. Polyester and A blend of cotton and/or polyethylene gives a good feel to the touch. Polypropylene is a pigment It can be blended as an additive, and aramids, especially Kevlar and No. Fformex) can be included to increase flame retardancy and Sold by Lloechst-CeLanese Polybenzimidazole (FBI), which has a high moisture content, improves flame retardancy and texture. Carbon for fibers requires strength and toughness. Can be included for composites.

Activated carbon fibers can be used for chemisorption protection.

Allied Signal Inc. (Allied-5 Shinognal Inc.) , ) spun 508 cm (2 inches) of Spectra 900 fiber or not. won. These fibers slip on the feed rolls and form clumps within the feed mechanism. So I had to stop the machine. Next, the above spectra 10dpf (filter) 70% fiber and 1.2 dpf kogel (denier value per lament) ) Polyester 3.81 cm (1,5 inch) mixed fiber with 30% stable A second trial was conducted using TOAPR Spectra 5.08 crn (2 inch ) Kogel with 70% stable and 1°2apr3. LLcm (1.5 inches) A 30% polyester stable mixture was prepared and loaded into a card feeder.

The mixed fibers are polyester fibers that are entangled with each other to form fiber globules. The spinning became difficult after about 30 minutes. The screen in the even feed device Transfer the Pectra fiber batt and polyester fiber ball towards the main cylinder of the card. I couldn't get it to move.

This fiber was slippery and could not be moved by the feeder mechanism. stop trying and cleaned the card feeder.

10dpf Spectra 900 5.08cm (2.0 inch) Stable 7 Aiha 60% by weight, 5dpf Kevlar 3. 81cm (1.5 inches) A second trial was conducted using a blend with 40% by weight stable fiber. Figure 4 As shown in the figure, a fixed length of double-sided adhesive tape is spirally wrapped around the feed roll 23. wrapped around. Due to the difference in open fiber dpf, it is important to know how well this mixture can be mixed and spun. Hair loss was an issue, but it wasn't serious. However, this method is optimal In order to achieve this, it is desirable to keep the dpf values of the fibers the same.

A total of 22.7 kg (50 lbs) of Spectra/Kevlar fiber blend was produced. Ta. To suppress static electricity, buy Stay Guard from a general store. I bought a stop spray. This electrostatic spray is used when opening and mixing fibers. Added to the fiber inside the machine. No static electricity problems occurred.

The main problem during wool spinning is loading the spectra fibers into the main cylinder of the card. It was. This problem can be solved by using fibers with lower dpf values or by This problem can be solved by developing special fiber treatment. by card flat A large amount of spectra fibers were also removed. Card flat rotates relative to main cylinder and assist in its cleaning. This problem will disappear once the cylinder loading issue is resolved. it will perish.

The spun sliver is divided into 6 wires and fed to a Sacrowell 415 drawing machine. provided. This drawing machine ran black-coated rubber rolls. This black roll appeared to minimize the tendency of the sliver to wrap.

This kneading machine further mixes the spun sliver and reduces the weight of the sliver by approximately 50%. I made it a little less.

The roving was produced on a Saco-Rowell drawing machine. What happens during the formation of roving? No other problems occurred.

This roving was converted into spun yarn by circular spinning mga. Special count with different speed and conditions A yarn having the following properties was produced. I tried to get the first yarn to be number 20.

Spinning the 20 count yarn was extremely difficult as the yarn would break all the time. calculation According to the paper, the formation of the 20th yarn is done on the end which is physically impossible due to the fiber diameter. It became clear that this was the case. (Theoretically, more than 88 fibers are required in the cross-section of the spun yarn.) It is said that The dpf value of Spectra fibers indicates that sufficient fibers are included in the cross section of the spun yarn. This yarn is too small to be number 20. ) manufacturing The counts of the two spun yarns were number 10 and number 5. This yarn is both Can be easily spun together. How to achieve the best balance of physical properties in finished yarns Optimization is necessary.

Example 2 Example 1 was repeated with the following fiber loadings.

3dp f spectra * 5.08cm (2”) stable 70% 1. 2dpf cordel polyester 3. 81 cm (1,5”) stable 30% The following 4 types of spun yarns It was successfully manufactured.

10th single yarn, 10th two-ply, 20th single Thread, 20 count double thread.

*This Spectra fiber has a low intrinsic viscosity of about 6 to 8 and a molecular weight of about 700°. It was estimated to be 000.

Example 3 (comparative example) 100% Spectra fiber unmodified from Example 1! I tried spinning on the top, but without success. It was. The same result was obtained when a worsted spinning system was tried.

Spectra/Aramid Blended Yarn Gloves Spectra and Kevlar fibers of Example 1 Articles made from the mixture with fibers showed good flame retardancy and insulation properties. Woven fabric (this (knitted gloves) exposed to the flame of a lighter will remove the exposed polyester on the woven surface. The tyrene fibers melt back into the fabric, but the aramid fibers still remain on the surface of the fabric. was. This fabric did not ignite or burn. If the spectra fiber gets hot enough This is surprising since it is a combustible polyolefin. The inside of the glove is cold It remained as it was. The spectral fibers of the woven fabric on the other side of the flame do not appear to have melted. I couldn't see it. A woven fabric made from a mixture of spectra fibers and aramid fibers. Even when attempts are made to ignite it graphically, the fabric exhibits self-extinguishing behavior and easily supports combustion. I didn't have it. (This is surprising since combustion of olefin fibers is known.) Pectra fibers improve the abrasion resistance of aramid fibers (in the case of this glove) and This is thought to extend the service life of the product. Woven fabrics made from fiber mixtures are aramid The fibers have a good hand feel and also reduce the surface smoothness of the woven fabric. The frictional properties of the surface were improved over the full spectrum woven fabric. This friction characteristic Improved properties would be desirable for gloves due to the need for better object grip.

Summary book Spinning method of high molecular weight polyethylene fiber and spun fiber discontinuous length (staple height) Method for spinning polyethylene fiber with molecular weight (150,000 or more) and its results The resulting spun fibers are disclosed. This method is based on the length of high molecular weight polyethylene fibers. a step of mixing other fibers of discontinuous length in sufficient quantities to enable spinning) include. The resulting spun yarn has a fineness of 20 denier per filament. Discontinuous length characterized by an ultimate elongation of 8% or less at room temperature. Containing about 5 to 95 weight percent of high molecular weight polyethylene fibers, the filament Permanent fineness of 20 denier or less and permanently crimped or memory Contains about 5 to 95 percent by weight of non-continuous fibers having a discontinuous length. It is preferable to do so. Supported fibers or supported fiber mixtures impart specific properties to spun fibers. selected to be granted. For example, polyester or cotton for a better feel. : Pigmented polypropylene for coloring: M Aramid and polybenz for imparting flammability Imidazole (FBI); Compounds requiring chemisorption, chemical resistance, strength and toughness Carbon for things, etc. This spun fiber is suitable for composites, industrial, medical and/or Or it is useful for apparel.

Submission of translation of written amendment (Article 184-8 of the Patent Act) September 14, 1992 1. Display of patent application PCT/US91101561 , name of invention Morristown, Columbia Road 101゜P-O Box 224 5 Name: Allied-Signal Incorporated 4, Agent Address: Shin-Otemachi Building, 206-ku, 2-2-1 Otemachi, Chiyoda-ku, Tokyo Specification Background of the invention: Method for spinning high molecular weight polyethylene fibers and spun fibers l1 Field of invention The present invention relates to the spinning of stable fibers into yarns and the resulting Concerning spun yarn. More specifically, the present invention provides high molecular weight polyethylene. For spinning stable fibers and high molecular weight polyethylene fibers. Regarding the modification of conventional spinning technology necessary for this purpose.

2. Prior art Spinning staple (discrete length) fibers has been practiced for centuries.

Natural fibers have discrete lengths and must be spun to form continuous yarns. .

Synthetic continuous filament fibers can be spun in place of stable fibers for various reasons. has been achieved. One of the reasons is to improve the feel and appearance of the yarn. .

Another reason is that this spinning method allows the use of fibers that would previously have been discarded. The objective is to manufacture good-quality rings at a lower cost.

By solution spinning such as high strength polyethylene fiber SPECTRA (SPECTRA) After the advent of manufactured high molecular weight polyethylene continuous filament fibers, Continuous filament fibers are cut into staples and the stable fibers are It was only a matter of time before attempts were made to spin it into yarn. when you try that , the fiber batt is slippery (the normal feed roll is transferred to the card). It was impossible to move and to spin wool. Furthermore, this slippery Even if attempts are made to overcome the problem by crimping the fibers, the fibers will not remain crimped. It was discovered that Another reason why we tried crimping was because high-strength polyethylene fiber Contrary to experience with other fibers, the It did not try to return to its original state due to its elasticity. Until the present invention, this problem was not resolved. The present invention was developed in an attempt to overcome these problems. It is what was done.

Although there are published reports of polyolefin fibers mixed with other fibers, these Publications focused on high molecular weight polyethylene stable fibers include I don't wear one. For example, EP-A-0310202 describes polyolefin filaments or yarns with high wettability and adhesive strength. It is described that it can be combined with These filaments or yarns are core spun. Combined by core spinning or heating, spinning yarns could be formed from stable fibers of this combination. There is no mention of that at all. GB-A-2152543 describes olefin fibers. high-bulk olefin blend yarns containing fibers and naturally occurring fibers such as cotton or wool; is disclosed, which includes solution-spun or gel-spun high molecular weight polyethylene fibers. There is no mention of fiber.

The scope of the claims 1. Spun fibers comprising at least two different types of fibers of discontinuous length In yarn, solutions in which one type of fiber has a molecular weight of aoo, ooo or more A spun or gel spun polyethylene fiber, which is a second type of fiber or fibre. existing in sufficient quantities to enable the spinning of mixtures of these different types of fibers. Said spun yarn characterized in that it is any other fiber present.

2. The yarn according to claim 1, wherein the other fiber has memory.

3. Claims in which the other fibers have a fineness per filament of about 20 denier or less Yarn according to paragraph 1.

4. Other fibers include polyester fibers, polyamide fibers, cotton fibers, wool fibers, and rays. Yon fiber, polypropylene fiber, aramid fiber, low molecular weight polyethylene fiber, charcoal Claim 1 selected from the group consisting of elementary fibers and mixtures thereof. Yarn.

5. The other fibers are aramid fibers, and the amount of the spun fibers is approximately 50% by weight or less. Yarn according to claim 2.

Yarn according to item 2.

7. Spun fibers comprising at least two different types of fibers of discontinuous length In yarn, one type of fiber has a molecular weight of about 300,000 or more. A liquid-spun or gel-spun polyethylene fiber, which is a second type of fiber or fiber. fibers in sufficient quantities to enable the spinning of mixtures of these different types of fibers. produced from said spun yarn characterized in that it is any other fiber present. Goods.

8. A method of spinning at least two different types of fibers of discontinuous length, comprising: , (a) 5 to 95% by weight of discontinuous length having a molecular weight of 300,000 or more , solution-spun or gel-spun polyethylene fibers can be spun into the resulting mixture. (b) mixed with any other fibers of discrete length sufficient to make the fibers The above-mentioned spinning method, characterized in that the mixture is spun to form a yarn.

9. Other fibers include polyester fibers, polyamide fibers, cotton fibers, wool fibers, and rays. Yon fiber, polypropylene fiber, aramid fiber, low molecular weight polyethylene fiber, charcoal Claim 8, wherein the fiber is selected from the group consisting of elementary fibers and mixtures thereof. Method.

10. Fibers having at least about 50 weight percent high molecular weight polyethylene fibers a rotating means (23) having a surface that rotates in contact with the bat (35); Straight line with trumpet (21) made of fiber batt (35) with sliver (20) A transfer device for said fiber batt (35) comprising cards (18) arranged in At least a portion of the surface increases friction between the surface and the fiber batt (35). The trumpet (21) is characterized by being modified so that the trumpet (21) said transporter characterized in that said port (20) has an enlarged outlet (57); sending device.

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Claims (12)

[Claims] 1. Capable of spinning discontinuous length high molecular weight polyethylene fibers and mixtures of these fiber lengths. and a sufficient amount of other fibers of discontinuous length to make the polyethylene have a molecular weight of about Spun yarns such as 300,000 or more. 2. Claims in which the other fibers have a fineness per filament of 20 denier or less Yarn according to paragraph 1. 3. The discontinuous length of the polyethylene fiber and the other fiber is approximately 35.6 cm (14 inches). Yarn according to claim 1, which is: 4. Other fibers include polyester fiber, polyamide fiber, cotton fiber, wool fiber, and rayo fiber. fiber, polypropylene fiber, aramid fiber, low molecular weight polyethylene fiber, carbon The yarn according to claim 1 selected from the group consisting of fibers and mixtures thereof. Yes. 5. The other fibers are aramid fibers and account for less than about 50% by weight of the spun fibers. Yarn according to claim 2, which comprises: 6. Claim 2, wherein the other fiber is poly(p-phenylene terephthalamide) Yarns listed in section. 7. An article made from the spun yarn of claim 3. 8. An article made from the spun yarn of claim 1. 9. A method of spinning high molecular weight polyethylene fibers of discontinuous length, the method comprising: mixing other fibers of discrete length in sufficient quantities to permit spinning of the mixture; the polyethylene has a molecular weight of about 300,000 or more, and the polyethylene A method characterized in that the fibers account for about 5 to 95% by weight of the mixture. 10. Other fibers include polyester fibers, polyamide fibers, cotton fibers, wool fibers, and lace fibers. Yon fiber, polypropylene fiber, aramid fiber, low molecular weight polyethylene fiber, charcoal Claim 9 selected from the group consisting of elementary fibers and mixtures thereof. Method. 11. The fiber batt contains approximately 50% or more by weight of low molecular weight polyethylene fibers. an apparatus for moving said fibers, said rotating means comprising said means for rotating said fibers; a surface that rotates while in contact with the bat, the surface being a surface that rotates while the bat rotates; to increase the friction between the surface and the fiber batt so that it moves when in contact with the surface. , a fiber batt characterized in that at least a portion thereof is modified in the lateral direction. A device for moving. 12. The fibers are placed on a card with a trumpet modified to enlarge the exit opening. 12. The method of claim 11, wherein the fiber batt is further processed to form a sliver. equipment.