CN1033657C

CN1033657C - New polyester fiberfill

Info

Publication number: CN1033657C
Application number: CN88107859A
Authority: CN
Inventors: 克拉克·拉斯特·布罗德斯
Original assignee: EI Du Pont de Nemours and Co
Current assignee: INVISTA TECHNOLOGIES R L SA
Priority date: 1987-11-13
Filing date: 1988-11-11
Publication date: 1996-12-25
Anticipated expiration: 2003-11-11
Also published as: IN171801B; JPH01148809A; FI885221A0; AU607278B2; NO885050D0; ATE86678T1; BR8805884A; MA21437A1; PT88997A; NZ226935A; DE3879110D1; AU2502788A; HK78893A; DE3879110T2; KR910008667B1; MX169276B; NO167309C; NO885050L; DK630588D0; IE63237B1

Abstract

New polyester fiberfill of round cross-section, but containing multiple peripheral voids around an axial void, and preferably seven such voids in a hexagonal packing arrangement, and processes for preparation and use, and articles filled with such new fiberfill.

Description

New polyester fiberfill and preparation method thereof

The present invention relates to new-type polyester fiberfill, have a plurality of continuous holes along its filament length direction in this oakum, the invention still further relates to the manufacture method and the purposes of this oakum, and the goods of using this novel oakum institute fibrefill.

Polyester fiberfill (being referred to as the polyester fiberfill material sometimes) has been widely used as comparatively cheap fibrefill and/or heat insulating material formed, is applicable to pillow, batts and other family expenses material, comprises the material of making the bed, and also as dress material, has now dropped into large-scale industrial production.At first, as other kinds polyester fiber, employed also is the solid fibers of circular cross-section, and these are the most cheap fibers of manufacturing, and the polyester fiberfill of this circular cross-section still as commodity in use.But before about 20 years, people propose also to bring into use hollow polyester fibre, and at United States Patent (USP) 3,772, No. 137 and Glanzstoff are in BP 1,168, disclosed in No. 759 as Tolliver.What Tolliver proposed is single hollow or center continuous axial doughnut.Its hollow preferable shape is a noncircular cross section, but also disclosed the cross section and approached circular hole, and owing to have the hollow polyester fiberfill of single circle and non-circular centre bore than solid oakum light (density is littler), and because thermal property is better, also because of more attractive in appearance, so develop into large-scale production.In recent years, a kind of improved hollow polyester fiberfill has appearred again, as european patent application 267, No. 684 disclosed, be characterized in four equal and opposite in directions being arranged round an entity axle center, spacing is identical and be the hollow of noncircular cross section, so the cross section of this monofilament is tetragonal peripheral profile, and limited by four straight flanges and four fillets, also have the zigzag curled configuration simultaneously and have smoothing preparation is arranged, make it to have very high bulkiness and bulk durability, and can improve its flexibility, make it more to resemble the natural down oakum.

Although it is near over several years for proposing and the existing some improvement of various existing configuration of the polyester fiberfill in industrial tool continuous axial hole, amazing is to be significantly different with former configuration and to have superiority that by improved polyester fiberfill of the present invention the present proves as follows respectively.

The object of the invention provides the hollow polyester fiberfill of renewal type, along its length direction 7 or more a plurality of continuous hole is arranged in the monofilament of this polyester fiberfill, comprising 1 centre bore and on every side 6 or more a plurality of hole.Simultaneously, another purpose of the present invention is to propose improving one's methods of this polyester fiberfill of preparation, wherein uses the spinneret orifice spinning monofilament of the present invention's design.

By the present invention, the polyester fiberfill that is provided is that circular monofilament polyester constitutes by its cross-sectional circumference limit substantially, the dawn number of this monofilament is about 5 to 20, it is circular continuous hole substantially that the length direction of suitable this monofilament has at least 7 cross sections, one of them hole is located substantially on the center, all the other each hole dimensions equate substantially each other and with basically equidistantly around this medium pore, and also be equally spaced basically apart from this medium pore and this monofilament neighboring.By one embodiment of the present invention, all hole is preferably big or small basic identical, and also all equates substantially with the spacing of adjacent pores, so be arranged in hexagon with regard to constituting just in time seven holes, promptly there are six holes in hole of central authorities on the hexagonal, will this be stressed and discuss below.

Yet, also can arrange like this, making the section ratio of medium pore exactly, each is lateral opening big slightly, and lateral opening big or small identical and mutual spacing is equated, and with the periphery sides of medium pore also be equidistant, the advantage of arranging like this is to possess a bigger medium pore; According to this embodiment, each lateral opening preferably symmetry arrangement, and should be even number, preferably totally 8, like this, together with medium pore totally 9 holes.

Preferred total pore space content generally is about 8-25% (cross-sectional area by this monofilament polyester calculates, and averages).

As the present technique field known and will in hereinafter the explanation, it is crucial making polyester fiberfill that Texturized bulkiness and bulkiness durability for it take place, the number that curls the preferably about 4-12 of per inch is individual curling, is equivalent to every centimetre of about 1.5-5 and curls.

The most handy a kind of durability smoothing preparation of this kind oakum carries out smooth treatment.

By the present invention, the preparation method of this kind new polyester fiberfill also is provided, this method goes up polyester around at least 6 spinneret orifices (11) extruding of circumference symmetry arrangement to come out by spinning plate (12), making it that coalescence effect takes place then and forming its neighboring is circular monofilament polyester substantially, be circular continuous hole substantially wherein along at least 7 cross sections are arranged on each root filament length direction, and one of them hole is located substantially on the center, the size in all the other each holes equates substantially each other and with equidistant surrounding said central hole basically, and also equates substantially with medium pore with the spacing of monofilament neighboring.

By the present invention, indoor appliances and apparel product with this kind new polyester fiberfill institute fibrefill also are provided, comprise separately with this kind new polyester fiberfill or with other fibrefill material blending after the goods of institute's fibrefill.

New polyester fiberfill of the present invention can possess higher stiffness under identical voids content, so the resistance to compression recovery is more excellent, and have more superior frictional property and durability after Texturized and smooth treatment.

Fig. 1 is the cross section microphoto of the typical polyester oakum monofilament of one embodiment of the invention.

Fig. 2 is a kind of enlarged drawing that is applicable to the spinneret orifice of melt-spun polyester fiberfill monofilament shown in Figure 1.

Fig. 3 is the cross-sectional view of expression another embodiment of the present invention.

The present inventor be sure of that fundamental of the present invention is along this circular monofilaments length The number in a plurality of continuous holes and arrangement mode, and for propose up to now or used The improvement of polyester fiberfill. People can infer that wherein some advantage can be by looking back also at least Just can obtain explaining with the configuration of prior art/cross section phase analogy or contrast, still for Polyester fiberfill is up to now believed this combination of each key element or new. This Bright person believes that circular peripheral shape is very important. The present inventor also believes, is positioned at central authorities That is the hole of shaft core position also is a key element; In general, by polyester fiberfill of the present invention also Have the feature that is previously proposed by Tolliver, but polyester fiberfill of the present invention and Tolliver institute The difference of the configuration of invention is that the former provides a plurality of substantially parallel holes, and the latter only has one Individual hole. European patent application has provided a plurality of substantially parallel holes (4) for 267, No. 684, because of This polyester fiberfill with the Tolliver that only has an axle center hole is compared existing some improvement, Europe Patent application has its characteristics 267, No. 684 aspect several, namely the periphery of cross section is basically Quadrangle has the axle center of an entity, and only has 4 continuous parallel holes, and hole itself is not Be circular and just be positioned at tetragonal four angles or four protruding lobe positions; As hereinafter To point out that polyester fiberfill of the present invention might improve its curled configuration, and this curled configuration Believe that the polyester fiberfill for prior art is to be difficult to accomplish, even to cause may be to accomplish .

Although the present invention also is not limited to any operating principle, or since related factor very Many and resulting improvement do not had yet perfect understanding and be not limited to the road of any supposition Reason, but can infer a medium pore of the present invention and a plurality of lateral opening configuration, because to identical Voids content can possess higher stiffness, so the resistance to compression recoverability is more excellent; And can With further deduction, after Texturized, this curled configuration provides round corner angle, and Be not the curled configuration that more zigzag or acute angle are arranged, rear a kind of configuration is to have similar hole to contain Regular meeting occurs polyester fiberfill configuration in the prior art of amount when Texturized, like this (again Because the periphery of cross section is circular), just can possess more excellent frictional property and more during use Excellent durability. Configuration shown in Fig. 1 can possess These characteristics fully, and this configuration just Well 7 holes, their equal and opposite in direction, mutual spacing is all the same, in other words, is a kind of The hexagon arrangement mode, the present inventor believes to be exactly a kind of preferred structure like this, is symmetry Shape, have again optimum intensity: weight relativity (by the light requirement of its body). But at certain In a little purposes, it is better medium pore to be enlarged (with respect to lateral opening), therefore just uses Tolliver proposes a big medium pore, also possesses simultaneously the advantage of loose structure; At this The aspect, the present inventor believes that symmetrical arranging is advantageous; In other words, as shown in Figure 3, By 8 formed objects lateral opening 21 equidistantly to arrange around medium pore 22, become transversal Face is circular 23 and the monofilament in 9 substantially parallel holes altogether substantially, like this, just can provide certain A little advantages, self-evident, by a plurality of lateral opening other arrangement modes that center on a medium pore also be Passable, but generally the symmetry than hexagon filling arrangement mode is low.

In principle, produce the skill of hollow monofilament from polyester or other synthetic polymer melt-spuns Art is for a long time known in this area. H.Bohringer and F.Bolland are in Fasefforschung und Textiltechnik, 9, No, 10 (Qctober, 1958), pp 405-416 has published and has been entitled as " Development and Evaluation of Profiled Synthetic Fibers Withand WithoutHollow Core " paper, and in wherein having quoted from several pieces of other documents. Although What the document was mainly said is to make nylon monofilament, for the usefulness of making yarn fabric, and for example for knitting, So from different as the polyester fiberfill of fibrefill material, but with regard to making the hollow monofilament they Basic conception is identical. Yet, although proposed several porous hollow monofilament in the document, And with for obtaining the design of the used spinning plate of these porous hollow monofilament, but this document (with And the other several pieces of documents that propose together) do not disclose out how to make configuration of the present invention in, That is the basically circular monofilament in a medium pore and at least 7 holes of sum arranged. For complete Become this task that proposes now, have quite big difficulty, and must carry out the great many of experiments worker Do, because monofilament and its Kong Doutai are very thin, and the expansion behind the known spinneret orifice of people is existing Resemble and the difficulties such as so-called " canting " phenomenon, some people once suspected in force this task Can finish. But the spinneret orifice design of using as shown in Figure 2 as described later, has been finished this Individual task has been arranged 6 spinneret orifices 11 (at the face of this spinning plate 12 at this spinneret On), then polymer can be gone out by the extruding of each spinneret orifice, coalescence effect takes place then and Form circular monofilaments as shown in Figure 1,7 holes are wherein arranged, the size in each hole is substantially the same, And mutual spacing is also substantially equal. Although when the design of reviewing in the past, can find the design To have followed the General Principle that has illustrated in the art, but just above mentioned, for making The present invention has the circular porous polyester monofilament of a medium pore, must pay great efforts and work Great many of experiments just might success.

Remove by the present invention and make outside the monofilament polyester with particular configuration this kind monofilament system Each step when making comprises the preparation of this polymer, and the processing of these monofilament, with it Be processed into the carrying of short fiber and this oakum material and as the oakum material of some goods Purposes, for example make pillow and other fibrefill goods such as batts, or make the quilting batts, Comprise quilted product, comprise clothes etc., can be undertaken by known method, for example exist Method described in the prior art of herein quoting with other places. Such as front explanation, preferred Polyester polymers generally is PETG, because its industrial output is big easily , and price is more honest and cleaner, and can select suitable relative viscosity by processing conditions, so that Be provided as the required configuration of fundamental of the present invention. Can also use a kind of chain branching agent, Such as by people such as Broaddus in 014,246 of the common application of on February 11st, 1987 and this case Described in number.

As front pointed, polyester fiberfill is carried out " smooth " processing for a long time for known, and Be put to commercial Application, for example use polysiloxanes as smooth treatment agent, for example Hoffman No. 3,271,189, United States Patent (USP), No. 3,454,422, the people's such as Mead United States Patent (USP), Ryan United States Patent (USP), 3,488, No. 217, No. 4,146,674, the people's such as Salamon United States Patent (USP), and The Japanese patent laid-open publication gazette 58-214 of Takemoto Oil﹠ Fat Co.Ltd, 585 (1983) numbers institute drapes over one's shoulders The content of revealing. Polysiloxanes and/or other smooth treatment agent can be used for improving polyester fiberfill outside See, and preferably use in the present invention these smooth treatment agent to reach some requirement. As Marcus can demonstrate,prove in disclosed in the common application case 921,646 on October 21st, 1986 The smooth treatment agent of bright non-silicone class is useful for some purpose. The smooth treatment agent Be well " curing " to monofilament, for example with the method for being heating and curing, thereby can improve it mostly Durability in the number purposes.

Further illustrate the present invention by following example.

Example

With relative viscosity is 20.4 (80 milligrams of polymer to be dissolved in 10 milliliters of hexafluoroisopropanols that contain 100ppm sulfuric acid, in 25 ℃ of mensuration) polyethylene terephthalate be spun into monofilament, polymer temperature is 291-297 ℃, spinning speed is 900 yards/minute (823 meters/minute), 288 pores are arranged on the used spinning plate, the output of each pore is 0.306 Pounds Per Hour (0.139 kilogram/hour), and used spinneret orifice as shown in Figure 2.These combination of monofilaments are become rope form (lax stretching dawn number is 914,000).In a usual manner this rope form silk being stretched, is to carry out in 90 ℃ hot wet spray drawing zone, and draw ratio is 3.46X.The monofilament that has stretched is carried out Texturized in the conventional stuffer box crimper of cantilevered (3.5 inches, 8.9 centimetres of sizes), the rope form silk after will curling then is lax in 180 ℃ of bakers.The smooth finishing agent that will contain a kind of poly-amino silicone is applied on this monofilament, makes that the polysiloxanes solid contents is 0.32% (weight) on the fiber, covers the antistatic finishing agent that applies a kind of routine, about 0.07% (weight) of consumption then.In a usual manner fiber is cut the staple fibre that becomes 3.0 inches (75 millimeters) length then.It is about 12.3% to record the average pore total content of this fiber, and filament denier is about 9.The cross section of these fibers wherein has 7 parallel big or small essentially identical continuous holes as shown in Figure 1, and one of them is at the center of monofilament, and 6 with substantially equidistantly around medium pore in addition.The outside of monofilament is circular, and is smooth.

Make the similar sample of dawn number (C) in a similar manner, difference is the continuous hole parallel with 4, axle center that an entity is arranged, average total pore space content is 17.7%, and with its Texturized curling number of the unit length identical and bulkiness (at 0.2 pound/square inch) of becoming, for the usefulness of contrast with above-mentioned 7 hole fibers.

Measure every character of 7 hole examples (1) and 4 hole comparative sample (C), list in the subordinate list.The fiber that is to be noted that it is less to frictional coefficient of fiber, and more better 0.001 pound/square inch bulkiness, and the two all is amazing superiority.

4 hole oakums of 7 hole oakums of the present invention and contrast all are processed into 20 ounces roll roll up the batts pillow.As shown in Table, their height is the same, but makes us subjectively feeling more soft and more comfortable with the pillow of 7 hole fiber manufacturings, comprise newly make and through in experiment, step on stamp after, all be like this.The pillow of 7 hole fibers is presented at compression back and restores slowlyer, and this is unusual favorable properties.

Table product per inch TBRM bulkiness (inch) fiber is to pillow height (inch)

0.001 pound/0.2 pound/fiber of crispation number rub newly step on stamp after

The square inch square inch is wiped 4.8 6.25 0.43 0.203 9.15 8.07C-4-holes 4.5 5.98 0.45 0.219 0.09 8.22, coefficient 1-7-hole

Claims

1. polyester fiberfill, it is characterized in that this oakum is that circular monofilament polyester constitutes by its cross-sectional circumference limit substantially, the dawn number of this monofilament is about 5 to 20, it is circular continuous hole substantially that the length direction of suitable this monofilament has at least 7 cross sections, one of them hole is located substantially on the center, all the other each hole dimensions equate substantially each other and with basically equidistantly around this medium pore, and also be equally spaced basically apart from this medium pore and this monofilament neighboring.

2. by the polyester fiberfill of claim 1, it is characterized in that the monofilament of this oakum has 7 essentially identical holes of size, and also be substantially the same with the spacing of adjacent holes.

3. by the polyester fiberfill of claim 2, it is characterized in that this oakum carries out smooth treatment with the agent of a kind of durability smooth treatment.

4. by each polyester fiberfill among the claim 1-3, it is characterized in that the total pore space content of this oakum is about 8-25%.

5. by each polyester fiberfill among the claim 1-3, it is characterized in that this oakum through Texturized, its curling number be the about 4-12 of per inch curling.

6. one kind prepares improving one's methods of the described polyester fiberfill of claim 1, it is characterized in that polyester is gone up around at least 6 spinneret orifices (11) extruding of circumference symmetry arrangement by spinning plate (12), making it that coalescence effect takes place then and forming its neighboring is circular monofilament polyester substantially, wherein along each root filament length direction at least 7 cross sections being arranged is circular continuous hole substantially, and one of them hole is located substantially on the center, the size in all the other each holes equates substantially each other and with equidistant surrounding said central hole basically, and also equates substantially with medium pore with the spacing of monofilament neighboring.

7. press the method for claim 6, it is characterized in that wherein also comprising by stretching made monofilament is processed into fibre bundle, on it, use a kind of smoothing preparation again and carry out smooth treatment,, then these monofilament are processed into staple fibre through Texturized and carry out relaxation processes.

8. by the method for claim 6 or 7, it is characterized in that made monofilament comprises that 7 is circular continuous hole along filament length direction and cross section substantially.