FI87806C - FIBERFYLLNINGSBLANDNING INNEHAOLLANDE POLYESTER SAMT VADDSKIVA OCH DESS FRAMSTAELLNING - Google Patents

Description

1 37806

Polyester fiber filling mixture and polyester fiber filling board and its manufacture

The invention relates to improvements in polyester fiber filling material, generally referred to as polyester fiber filling, and more particularly to the production of polyester fiber filling in a form particularly suitable for blending with binder fibers, such blends can be thermally bonded to produce useful bonded products such as bonded wadding. bonded wadding and other articles containing these.

Polyester fiber padding is used commercially in many garments and other items such as sleeping bags, upholstery, pillowcases and pillows. A particularly useful and desirable form of polyester fiber filler is a cured polysiloxane as a coating, often referred to as a silicone lubricant, e.g., as disclosed in U.S. Patents 3,271,189 and 3,454,422, because certain desirable properties, such as feel, compressibility and compressibility, are present. will improve. Despite the widespread commercial use of such a silicone-lubricated polyester fiber filler, it has long been recognized that this coating has an important disadvantage in addition to the desired properties. U.S. Patents 4,281,042. . ·. and 4,304,817 reportedly, the silicone coating makes bonding nearly impossible at the intersections of the polyester fiber filler, especially when only the slipped polyester. mixtures of fiber filler and binder fiber are heat treated to ‘· **’ 30 to activate the binder fiber. The bonds obtained are very poor and appear to be the result of a binding *. : for fibrous or filamentary residues remaining from bicomponent fibers, the cores of which remain after binding. Thus, it is not practical to use this -____; 35 silicone-lubricated fiber fillers to form a bonded sheet or molded article that is properly bonded and durable, as is desirable for some applications.

It is a primary object of the present invention to provide a properly bonded batt having the advantages of its type 5 previously only available with unbound, slippery materials, e.g., in combination, with improved behavior (particularly durability) previously achieved only with "dry "prepared from fibrous stuffing). Another object is to improve the elasticity and structural balance of slipped fiber filling products. Other items appear later.

U.S. Patent 3,702,260 discloses surface-modified and polyester fiber filler products having improved compressive recovery and other notable properties (see column 2 to column 3), and a method of making such fiber filler products. The coating is co-crystallized on the surface of the crimped polyester staple fiber and consists of copolyester-20 comprising about 20 to 95% by weight of poly (alkylene) units and about 80 to 5% by weight of ester units that are identical to those on the polyester staple fiber substrate. The batt sheets of such coated fiber may be bonded or unbonded and are preferably unbound (column 2, lines 57-59).

. . ·. Binding resins can be applied to the batt sheets to prevent subsequent fiber leakage and / or to prevent the sheet from moving in end applications, e.g. by spraying. both surface sides in the form of aqueous emulsions, followed by drying and curing of '' 30 (column 5, lines 15-21).

Ko. The U.S. patent does not mention binder fibers or The fiber filler of the U.S. patent is not known to be used commercially.

. · * ·. It has been found that by replacing existing commercial silicone lubricants on the surface of a polyester fiber filler with a hydrophilic coating containing poly (alkylene oxide) chains or segments, it is possible to reach the desired target and achieve other advantages. Thus, such a coated polyester fiber filler can be bonded more efficiently than a silicone-lubricated fiber filler, e.g., from binder fiber blends, and its other advantages include reduced flammability and improved moisture transport, as mentioned below. It is believed important to ensure that the hydrophilic coating properly "cures" the polyester fibers, i.e., that the poly (alkylene oxide) chains are substantially permanently attached to the surface of the polyester fibers, i. so that they do not leave the washing or other treatments encountered in normal manufacture or use.

The invention thus relates to a polyester fiber filling mixture as claimed in the claims and to a polyester fiber filling sheet and its production, which are characterized by what is stated in the characterizing parts of the claims.

Accordingly, there is provided an improved polyester fiber filler composition comprising substantially 20 weight percent of (a) from about 60 to about 95% crimped polyester staple fiber and (b) additionally to a total of about 5% to about 40% crimped staple binder fiber. comprising a polymer having a bonding temperature lower than the softening temperature of said polyester staple fiber, characterized in that said polyester. the blade fiber has a cured coating of a lubricant consisting essentially of poly (alkylene oxide) chains.

Two commercial poly (alkylene oxide) copolymers comprising two different "curing" mechanisms are described in more detail below. The other is a copolymer of poly (ethylene oxide) and poly (ethylene terephthalate) which, when applied to the surface of a polyester fiber containing repeating poly (ethylene terephthalate) - v units and cured at about 170 ° C, fixes as ____; 35 tuna. The mechanism by which it cures is not fully understood, but it is suggested that the polyester segments co-crystallize onto the polyester fiber. Another curing mechanism 4 878G6 is implemented by crosslinking poly (alkylene oxide) chains modified with reactive groups capable of crosslinking without or with the addition of catalyst or crosslinking agents. Both of these routes can be accomplished using commercially available polymers with large segments of poly (ethylene oxide) and / or poly (propylene oxide) with poly (ethylene oxide) being preferred. Therefore, in one aspect of the invention, there is provided a polyester fiber-10 filler composition comprising substantially (a) from about 60 to about 95%, preferably from about 80 to about 90%, of curled polyester staple fiber, and (b) additionally to a total of about 100% by weight. 5 to about 40%, preferably about 10 to about 20% of curled staple binder fibers comprising a polymer having a lower melting point than the polyester staple fiber, wherein said polyester staple fiber is coated with a poly (ethylene phthalate) and poly (ethylene oxide) block copolymer in an amount of about 0.1 to about 1% by weight of the polyester staple fiber.

According to another aspect of the invention, there is provided a polyester fiber filler composition comprising substantially (a) from about 60 to about 95% by weight of curled polyester staple fiber and (b) in addition to a total of 100 to about 25% by weight of about 5 to about 40% by weight of curly; · /; staple binder fibers comprising a polymer having a melting point lower than that of the polyester staple fiber in which the polyester staple fiber is coated. . with modified poly (alkylene oxide) grafted to allow crosslinking to provide functional groups in an amount of from about 0.1% to about 1% by weight of the polyester staple fiber.

The use of these blends makes it possible to obtain bonded fibrous filler products with an advantage of -____: 35 and compared to hitherto commercially available products, as shown in more detail below 5 S 7 B O 6, but can be summarized as follows:

Improved behavior, especially durability, compared to "dry" (i.e., non-slip) fiber filler that has been commercially available.

Soft feel in combination with the balance and elasticity of the structure that results from good engagement.

Good moisture transport.

10 Absence of flammability, comparable to that obtained from a "dry" fibrous filler and not obtained with a previous commercial silicone lubricated fibrous filler.

An important element of the present invention is the use of a suitable coating material to provide the desired hydrophilic poly (alkylene oxide) chain coating for the polyester fiber filler. As already shown, some of these materials are commercially available.

Coating materials suitable for use in accordance with the invention include essentially poly (ethylene terephthalate) segments and poly (alkylene oxide) derived poly (alkylene oxide) segments having a molecular weight of between 300 and 6,000. Several such copolyesters and their dispersions are disclosed in U.S. Patents 3,416,952, 3,557,039, and 3,619,269, and in several granted patents disclosing corresponding segmental polyesters containing poly (ethylene terephthalate). tile) segments and poly (alkylene oxide) segments.

Poly (alkylene oxide) is preferably poly (ethylene oxide), which is also commercially convenient. One such product is commercially available from ICI America

Inc. as a textile finishing agent and is sold under the trademark "ATLAS" G-7264. This product is sold in Europe by 35 ICI Specialty Chemicals, Brussels. Another sells under the name "ZELCON" 4780 E. I. du Pont de Nemours and Company. Other materials are disclosed in U.S. Patent 3,981,807. Other suitable materials include 6,878,806 of modified poly (ethylene oxide) / poly (propylene oxide) grafted with functional groups to allow crosslinking, e.g., by a 5% by weight citric acid treatment. Such a product 5 is available from Union Carbide under the name "UCON" 3207A. Other materials which may contain particularly useful compositions are disclosed in EP patents 159,882 and 66,994. Further consideration is given in EP patent applications 86 106 603.3 (0 203 469) and 10 87 115 403.5 (0 268 099), which are filed simultaneously. ti with this application.

The application of the coating material to the polyester fiber can be carried out either on the crimped fiber or, preferably, on the pre-yarn, in particular after stretching in a crimping chamber. It is cured to the fiber by a method which is said to comprise crystallization or crosslinking together depending on the nature of the material. The fibrous filler can then be blended into the binder and packaged, or it can be packaged separately and blended into the binder fiber prior to fabrication of the product with standard sheet making equipment. In any case, the board is generally made, e.g., in an oven, to bind the binder to the fibrous filler and to achieve the special properties of the boards described herein. The coating can also be applied to the staple fiber of the fiber filler 25 at the end of the production line after cutting and before packaging without curing and then mixing with the binder. nekuituun. The mixture is then treated with normal carding equipment and curing can take place in an oven at the same time as the binding by the binder. These over-. However, system materials generally produce better results if applied before or during crimping because of the reduced inter-fiber friction. ·; it forms a smoother curl, which can also contribute to improved durability and increased softness. ·· *. 35 and bonding appears to be better as a result of ____ previous curing. The binder fiber mixture is treated with commercial carding equipment, 7 87805 is gauze formation and heat treatment in an oven to bind the fiber filling and the binder fiber.

The binders are preferably thermally activatable, i. they melt or soften at temperatures of about 50 ° C or more below the melting points of the polyester fiber filler so that bonding does not affect the integrity of the fiber filler itself. Commercially available shell / core 50/50 bicomponent binder fibers having a core of poly (ethylene terephthalate) homopolymer and shell of poly-10 (ethylene terephthalate / isophthalate) copolymer (60/40) modified to lower the melting point have been used with poly (ethylene) in connection with the fiber filling in the manufacture of the sheets of the invention. Although shell / core binder fibers are preferred, one-component binders can also be used, which is an improvement over comparisons made from the same binder and fiber filler without coating. The denier of the binder fiber is generally between about 3 and about 30 dtex, preferably less than about 20 dtex. Further information on binder fibers is provided in EP Patent Application 87,115,403.5 (0,268,099) and U.S. Patents 4,281,042 and 4,304,817.

The fiber filler may be from about 1 to about 30 dtex, solid or hollow, having one or more cavities, and may be circular or random in cross section. 25 Smaller deniers are mainly used in · * · ’· applications where thermal insulation is an important factor,. such as clothing, sleeping bags and special bedding for institutional use. For these applications, the compositions of the invention have several advantages over commercially available slip polyester sheets or binder fiber blends. The bonded sheets have softness and good bonding combined with good thermal insulation. The airiness and softness remain after many washes due to the wash resistance of the coating and the excellent re-35 end strength of the sheets has been shown to be due to good binding to ____ to the binder fiber fibers. The behavior of these bonded sheets is very astonishing given the previous β 87806 difficulties in bonding fibrous fillings lubricated with prior art silicone lubricants. The sheets combine this desired softness with a low flammability, which is characteristic of sheets made of non-slip fibers, and which is also different from the flammability of fibers slipped with silicones.

Compressibility measurements were made conventionally with an Instron to measure the compressive forces and the height of each specimen pad or pad, which specimens were pressed with a foot (10 or 20 cm in diameter) attached to the Instron.

Leg B (diameter 20 cm) is used for lower density products (eg cushions) with a maximum pressure of 100N and a support compression (SB = Support Bulk) of 30N 15 (representing the height of the cushion in cm below the average head weight). The softness in this case corresponds to the difference in height (in cm) between the initial height (IH2) at the beginning of the second compression cycle and the support compressibility; i. (absolute) softness = IH2 - SB (height at 30N). Softness 20 is sometimes pronounced as relative softness, i. as a percentage of IH2.

Foot A (diameter 10 cm) is used for products with a higher density (eg interior cushions, mattresses) at a maximum pressure (same as the support compression in this case): 60 .. (corresponding to the pressure produced by a seated person). The softness in this case corresponds to the difference in height. . ’· In the second compression (cm2) between the initial altitude (IH2) and the altitude at 7,5N; i. (absolute) softness in this case = IH2 - compressibility. 30 at 7.5N. Again, softness is sometimes expressed as relative ‘’ softness relative to IH2. The strength of the cushion is directly proportional to the strong support compression and '·' · inversely proportional to the softness.

Elasticity is measured as work recovery (WR = Work. 35 Recovery), i.e. ____ of the area bounded by the whole return curve, calculated as a percentage of the area bounded by the whole compression curve. The higher the WR, the better the elasticity.

9 37806

Durability - Several layers of each plate (50 x 50 cm) were stacked in a stack weighing approximately 850 g. The number of layers was checked to produce pads with the smallest possible weight differences. These were covered with kan-5 cabbage and measured with foot A. The initial density of the pads was between 12 and 15 g / l depending on the compressibility of the individual item. These lower density "pads" were repeatedly pressed to a maximum pressure of 1,225 N and at a rate of 1,200 cycles / hour for 10,000 cycles. The pads were re-measured and compression losses were measured.

A second set of pads was prepared by stacking a series of layers into pads weighing 850 t 15 g. The pads were compressed using buttons to provide backrest pads with a density of 25 to 28 g / l 15 (depending on whether the measurement was made at the top or near the buttons). These were Backrest tal-lauskoe using the human form of the back side area of 37 x 43 cm and 8.8 kPa pressure. Tapping was repeated at a rate of about 1,000 cycles / hour for 10,000 cycles. Softness-20 teas were re-measured after testing and compressibility losses were calculated.

Flammability: Two tests were used:

The methanamine tablet test is based on the U.S. Federal Carpet Flammability Test. Federal 25 Method, Flammability Standard for Carpets DOC FF 1-70.

. 45 degree open flame test DIN 54335.

The destroyed area was measured and recorded in both cases, and the rate of flame propagation was also recorded in the open flame test.

30 Strength: The adhesion test DIN 53857 evaluates the bond strength. (The results here are normalized to a common base of 200 g / m 2.); Washability tests: One layer (40 x 40 cm) of each plate is quilted (on a garment fabric) and sewn-35 cooks. The compression of the two layers is measured with an Instron (foot B-20 cm diameter, maximum pressure 240 N). All ίο 8 7 8 06 samples are washed in one washing machine at 40 ° C for three complete cycles. The samples were re-measured after washing and the difference in thickness was calculated.

The invention is further described in the following Examples. All parts and percentages are by weight unless otherwise indicated. All heights are cm and are sometimes also pronounced "compressibility".

Example 1

A commercial, hollow, non-slip polyester fiber-10 filler (6.1 dtex) was coated with a 0.35 wt% (dry matter) hydrophilic lubricant sprayed with an aqueous solution containing 2.8% dry matter "ATLAS" G- 7264 obtained by diluting a commercial emulsion (14%) 5X with water and then air-drying at room temperature. The coated staple fiber was blended (85/15) with the above 4.4 dtex shell / core binder fiber. This mixture was made into a 1 meter wide sheet with a density of about 180 g / m by superimposing four parallel layers of gauze. This plate was heat cured in a commercial 3.5 m wide oven at 160 ° C; this heat treatment had two effects as it cured the polyester fiber filler of the coating and activated the binder fiber binder shell bonded sheet. The various properties of the bonded sheet are measured and recorded in experiments which clearly demonstrate the superiority of heading 2 of this invention. compared to reference heading 1, which was made in exactly the same way from the same commercial fiber filler and binder fiber used, except that no coating containing '· - 30 hydrophilic poly (ethylene oxide) was used. Both products were made under otherwise identical conditions and heat-treated side by side in the same oven at the same time.

-V- 1 - Test plate 2 was much softer and more adaptable,; 35 but very different from silicone-lubricated ‘···’ products.

* »» 11 87806 2 - Table 1 shows the improved softness and durability compared to the comparison.

3 - Binding to the binder fiber was much better than with the 0.3% silicone lubricant, being 70% of the reference strength in the machine direction and 50% in the transverse direction, which is not very significant because there was no gauze formation in this example.

4 - The flammability of Test Item 2 was very close to the flammability of Comparison 1 with a flame duration of 1.0 second 10 (= comparison) and a destroyed length of 8.4 cm compared to 6, compared to Ora, while the silicone-lubricated plate was completely destroyed with a flame duration of 40 seconds. . 1 mm m 12 8 7 8 O 6 <3 »v 2- T? δ, “L 3.

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Although this coated fibrous filler had not been pre-cured (i.e., had not been heat treated prior to the bonding treatment), the tear strength of the sheet was surprisingly high at about 70% of the control value, indicating that the coating had bonded well to the fibrous filler. The following example shows the improvements obtained by curing the coating and using Kars stainers.

Example 2 10 1. This is the comparison described below.

2. The same 6.1 dtex hollow, dry, curled, commercial polyester fiber filler staple substrate is coated with 0.35% dry matter essentially following the procedure described in Example 1, and the coating is then cured to the fiber by heating the staple fiber at 170 ° C for five minutes. The cured, coated fibrous filler is then blended into the same shell / core binder fiber as in Example 1 in the same proportions 85/115. This mixture is prepared in a cardboard and gauze forming apparatus to produce a sheet having a density of about 190 g / m 2 and bonded in an oven at 160 ° C at a rate of 1 m / min. The following tables compare the properties of this bonded board under heading 2 with a reference board (heading 1) made from the same substrate polyester fiber filler without the hydrophilic coating of the invention and other boards made as follows. ; 3. The same base polyester fiber backing

: 0.35% dry matter by spraying with 20% UCON

· .: with 3207A solution (to which 5% citric acid has been added) and cured as in heading 2 above.

• 30 4. This is a comparison, similar to heading 1,::: but using a hollow, curled, 13 dtex polyester fiber filler in combination with the same 4.4 dtex binder fiber.

: 5. This is similar to Reference Heading 4, except that the polyester fiber filler is coated with 0.35% isel-35 1a "ATLAS" 0, -7264 13 dtex fiber filler and cured as Heading 2.

14 '<7306 6. This is similar to heading 2 above, except that the polyester fiber filling substrate is coated under pre-sheet factory conditions using an 8.2% ATLAS G-7264 emulsion in water to provide the same 0.035% dry matter coating to the fiber. The pre-yarn was then allowed to relax at 175 ° C to cure the coating and set the curl. The relaxed pre-yarn was cut mixed with a 60 mm shell / core binder fiber pre-yarn to give an 85/15 fiber filler / binder mixture. The mixture was converted to a plate and the plate was heat bonded under essentially the same conditions as described.

7. This heading was produced essentially in the same way as heading 6, except that the coating was manufactured by UCON

15 3207A as in heading 3.

In summary: Items 1 and 4 are comparisons, items 2, 5, and 6 are coated with ATLAS G-7264, while items 3 and 7 are coated with UCON 3207A; headings 2, 3 and 5 are coated in the form of staples and cured at 170 ° C, while headings 6 and 7 are coated in the form of pre-yarn before the curl is set at 175 ° C; headings 1 to 3, 6 and 7 have a fiber content of dtex 6,1, while headings 4 and 5 contain 13 dtex fiber fillings.

It is noted that the weights and densities of the plates are not identical. In order to obtain proper comparisons; at the indicated points, "normalized" by calculating all equivalents in the same weight at 200 g / m.

Table 2 gives the compression data for all seven bonded plates showing good results, 30 i.e. good binding occurred in each case in contrast to the silicone-lubricated fiber filler, which cannot be bonded in this way.

: Tables 3, 4 and 5 give flammability data. It is noted that none of the headings proved to be flammable 35 and the destroyed areas were comparable to comparisons 1 and 4 using non-slip (dry) 15 8 7 8 G 6 fibrous fillings, i. fiber filler coatings have not significantly increased flammability compared to dry fiber filler. For comparison, flammability tests were performed on comparisons 8 and 9 to demonstrate the well-known flammability associated with silicone-slip-5 products. Comparison 8 was a fully commercial silicone lubricated fiber filler sheet, except for the non-silicone lubricant parts as used in Examples 1 and 2. Comparison 9 was a 60/20/20 blend of which 60% was the non-slip fibrous filler used in Examples 1 and 2, 20% was slippery, the fibrous filler used in Comparison 8 and 20% was the binder fiber used in Examples 1 and 2; this shows that the addition of even a small amount of silicone-lubricated fibrous filler causes a very significant increase in flammability, which is detrimental. Flammability tests did not give cause for normalization.

Table 6 shows the fracture toughness measurements. The upper series gives the actual measurements and the different weights of each plate, while the lower series gives the calculated 2 20 measurements all normalized to the same weight of 200 g / m, as this is a better comparison which somewhat favors a lower weight comparison 1. Significantly superior breaking strength of preferred heading 6 is very impressive. The low readings for items 3 and 7 could be due to the nature of the coating and there would be better results. expected from an analog coating based on -; for poly (ethylene oxide) chains, as is preferred, but it is significant that even these coatings exhibit significant binding in contrast to the silicone-slip fiber filler, which gives products with virtually no binding at all (except possibly between residues of bicomponent binder fibers); ). These strength tests are only indirectly related to the durability of the cushions, but they show a strong bond, which partly explains the good support strength readings and durability.

• · * · · 16 8 7 8 ö 6

Table 7 shows the results of the lamination discharge test and again shows the strength of the interlayer bonds, especially with the preferred heading 6, which is much better than the comparison. This is a very important experiment because the disassembly of the 5 lamination is the main reason for the failure of some cushion and mattress structures and is also important in sleeping bags and sportswear.

Table 8 contains two sets of readings; Part A compares the trade comparison with heading 6 in compacted 10 pads with a density of 25 to 28 g / l. A comparison of the readings shows that the height of heading 6 is higher at relatively low loads (II ^ and 7.5N), but the compressibility is lower at the support compressibility level. This reflects the improved softness of the product, which is explained by the reduced-15 now inter-fiber friction. The durability of test item 6 is much better at all loads than in the commercial comparison, although its density is slightly lower. As shown in Part B of the table, the differences in compressibility are much greater when looking at the same items in uncompacted cross-pads or pads. Despite considerable differences in density, the compression losses of test item 6 are the same and retain much better compressibility after the durability test. Heading 7 also shows a significant improvement in compressive strength compared to commercial heading 25, especially in the supportable compression range. Items 3 and 7, which use Union Carbide 3207A, are also the softest, with the lowest support compressibility. This may be of interest for applications such as sleeping bags where high compressibility is required. Substantially all test items have the same or better durability than the comparisons, even if their density is slightly lower. Invention: durability advantage of the products over the comparisons The increased softness and durability advantage correspond to the real market need and the value of the products of the invention is further enhanced by the good bonding and non-ignition of these padding pads, which are of particular interest in such applications. than cushions and mattresses, but also sportswear, sleeping bags, etc. These 5 data in Table 8 give rise to several remarks: - Compressibility and compressibility resistance are essential in cushions and mattresses.

- The advantage of the products of the invention, in particular of heading 6, is in fact much greater than can be seen at a glance. Its durability is better at a much lower density expressed in g / l.

Table 9 shows the change in compressibility after three 40 ° C home washes. This again shows the good behavior of most of the products of the invention, as these 15 show the slightest changes, although the compressibility of headings 6 and 7 is much higher than the comparison. Heading 3 is the only exception which may reflect shortcomings in the manufacture of this heading.

18 37806

Table 2

Item No 1 2 3 4 5 6 7

Starting height (cm): 5 --- 1. Section 8.3 8.9 10.7 11.9 11.2 12.9 12.0 (IHj) Section 2 7.7 8.4 9.2 11, 6 10.0 12.0 10.9 Section 2 - height (cm) under the loads shown 10 2N 7.6 8.3 9.1 11.4 9.9 11.9 10.8 5N 5.6 5, 6 6.5 8.5 7.6 10.5 8.8 10N 4.6 4.7 5.2 7.1 6.3 9.3 7.6 (SB) 30N 3.1 3.1 3 1 4.4 4.0 6.7 5.1 60N 2.1 2.2 1.9 2.8 2.6 4.6 3.5 100N 1.5 1.6 1.4 1.8 1, 8 3.2 2.4 160N 1.1 1.2 1.0 1.2 1.3 2.2 1.7 240N 0.9 1.0 0.8 0.9 1.0 1.6 1 3

Height 0.7 0.7 0.8 1.1 1.0 1.7 1.3

Height lf6 1.7 1.6 2.0 2.0 3.3 2.6 Softness: 20 ~ Approx (cm) 4.6 5.3 6.1 7.2 6.0 5.3 5.8

Rel. (%) 59.7 63.1 66.3 62.1 60.0 44.2 53.2

Return work 63.6 70.8 59.8 55.6 62.9 67.0 61.8

Weight g / m2 190.4 234.4 205.0 203.4 239.6 221.5 199.6 * ·! 1 «· •» is 37806

Table 3

Flammability test at 45 ° C (DIN 54 335) showing the destroyed area (Flame length = 4.0 cm and exposure time = 15 seconds) 5 Destruction „. Flame duration (s) exposed nut area

Identification 5.0 cm 30.0 cm 55.0 cm Total (cm2) _ (s) _

Item 2 0 0 0 0 6.2

Item 2 0 0 0 0 5.8

Item 30 0 0 0 5.0

Item 4 0 0 0 0 7.0

Item 5 0 0 0 0 7.4

Item 6 0 0 0 0 8.0

Heading 70 0 0 0 10.2

Comparison 8 6.0 55.0 76.0 137.0 504.0

Comparison 9 10.0 65.0 80.0 155.0 504.0 · 20 3 7 806

Table 4

Flammability test at 45 ° C (DIN 54 335) showing flame speed (Flame length = 4.0 cm and Exposure time = 15 seconds) 5

Flame speed (cm / min) spread

Recognition_2.0 min_3.0 min_

Heading 1 0.0 0.0

Heading 2 0.0 0.0 10

Heading 3 0.0 0.0

Heading 4 0.0 0.0

Heading 5 0.0 0.0

Heading 6 0.0 0.0 15

Heading 7 0.0 0.0

Comparison 0 54.6 72.4

Comparison 9 41.3 46.2 21 37806

Table 5

Flammable tablet (methanamine) test showing destroyed area (15 seconds after exposure)

Destroyed area TahInt burning

Identification_ (cm2) _ (s)

Item 1 12.64 Avg. 1'27

Heading 2 14.51 1'30 10 Heading 3 15.54 1'31

Heading 4 11.19 1'30

Heading 5 12.94 1'31

Heading 6 14.53 1'31 15 Heading 7 13.53 1'31

Comparison 8 62.02 1'30

Comparison 9 67.39 1'30 22 87 806

Table 6

Adhesion test (N) showing the breaking strength of the plates

Faino Machine direction Pocket direction

Identification _ (g / cm) _ (H.D.) _ (X · D ·) _

Heading 1,190.4 19.2 70.3

Heading 2,234.4 25.1 67.4

Title 3 205.0 7.8 29.3 ^ Title 4 203.4 15.8 48.7

Heading 5 239.6 19.7 43.9

Heading 6 221.5 64.3 186.0

Heading 7 199.6 12.0 53.0 15 2

Normalized strengths for weight (200 g / m)

Heading 1 20.2 73.8

Heading 2 21.4 57.5 20 Heading 3 2.6 28.6

Heading 4 15.5 47.9

Heading 5 16.4 45.0

Heading 6 58.1 167.9 25 Heading 7 12.0 53.1 23 37806

Table 7

Lamination stripping test (N) showing the bond strength layer by layer

Machine direction Transverse direction 5 Detection_ (M.D.) _ (X.D.) _

Title 1 Avg. (N): 7.1 7.7 CV (X): 2.7 11.1

Title 2 Avg. (N): 7.0 8.3 CV (%): 10.0 7.7

Title 3 Teskim. (N): 2.7 3.6 CV (*): 5.8 2.1

Heading 4 Avg. (N): 5.4 7.0 CV (X): 8.8 12.2

Title 5 Avg. (N): 6.1 7.2 CV (X): 7.8 4.9

Title b Avg. (N): 15.9 13.5 CV (X): 10.3 3.5

Heading 7 Avg. (N): 4.2 4.8 CV (X): 13.2 8.0 2 «87805

Table 8

Durability data showing losses in initial height & support compressibility before and after treading (60 x 60 cm) ^ A. Condensed pads at a density of 25 - 28 g / l

Katipa 11 i non vert. Title 6

Shaft height (cm).

Before treading 14.8 16.3

After treading 13.28 15.38

Abs. difference (cm) 1.52 0.92 10 Difference (%) -10.27 -5.64

Compressibility at 7.5 N (cm)

Before treading 13.53 14.2

After treading 11.63 12.7

Abs. difference (cm) 1.9 1.5

Difference (%) -14.04 -10.6 ^ Support compression (60 N) (cm):

Before treading 8.8 7.63

After treading 6.05 5.36

Abs. difference (cm) 2.75 2.27

Difference (Z) -31.87 -29.75 B. Uncompressed pads; density 12 r / 1

Item 1 2 3 4_5_6_7 Comparison 2q Starting height (cm):

Before treading 13.20 15.05 13.1 14.22 14.5 17.17 15.47 12.4

After charging H 3 12.87 10.72 11.9 12.52 14.52 13.07 10.08

Abs. difference (cm) 1.9 2.18 2.38 2.32 1.98 2.65 2.4 2.32

Difference (%) -14.39 -14.49 -18.17 -16.32 -13.66 -15.43 -15.51 -18.71

Compressibility at 7.5 N (cm):

Before treading 9.02 10.45 8.55 10.95 10.7 11.75 10.0 9.45 25 After treading 7.17 8.3 6.70 8.35 8.07 8.7 7.75 7.0

Abs. difference (cm) 1.85 2.15 1.85 2.6 2.63 3.05 2.25 2.45: "Difference (Z) '-20.51 -20.57 -21.64 -23, 74 -24.58 -25.96 -22.54 -25.93; Support compression (60N) (cm): - Before treading 2.55 3.05 2.32 4.55 3.95 2.75 2.22 3.60, After treading 2.1 2.32 1.9 2.85 2.4 1.87 1.75 2.13

Abs. difference (cm) 0.45 073 0.42 1.7 1.55 0.88 0.47 1.47

Difference (Z) -17.65 -23.93 -18.1 -37.36 -39.24 -32.0 -21.17 -40.83 25 87806

Table 9

Effect of washing on compressibility resistance (three 45 ° C home washes) Starting height Support pressure 5 Identification_ _ (X) _ (X)

Title 1 + 24.32 + 6.25

Title.2 + 9.52 0.0

Name kp / '3 +30.75 +5.88 10 Title 4 +7.55 - 11.54

Heading 5 0/0 0.0

Heading 6 +6.56 - 7.69

Heading 7 3.92 - 5.26

Claims (10)

1. An improved fiber filling mixture containing polyester consisting essentially of weight (a) of about 60 - about 95% crimped polyester staple fiber, and (b) complementary, up to a total of 100%, about 5 - about 40% of crimped binder fiber, comprising a polymer having a bonding temperature lower than the softening temperature of said polyester staple fiber, characterized in that said polyester staple fiber exhibits a coating cured thereon of a smoothing agent consisting essentially of chains of polyester poly (alkylene oxide). 2. A blend according to claim 1, characterized in that the polyester staple fiber is coated with a segmented copolymer of poly (ethylene terephthalate) and poly (ethylene oxide) in an amount of about 0.1% to about 1% by weight of the polyester staple fiber. 3. A mixture according to claim 1, characterized in that the polyester staple fiber is coated with a modified poly (alkylene oxide), grafted with functional groups to allow crosslinking, in an amount of about 0.1 - about 1 weight. -% of the polyester staple fiber. 4. A mixture according to any one of claims 1-3, 2. characterized in that the polyester staple fiber is coated with the smoothing agent in an amount of approx. 0.15 - about 0.6% by weight of polyester staple fiber. 5. A process for preparing a bonded wadding sheet of polyester fabric overfill, characterized in that about 60 to about 95% by weight of crimped polyester staple fiber having a coating cured thereon by a smoothing agent consisting essentially of chains of poly (alkylene oxide), is mixed with about 5 - about 40% by weight of crimped: binder fiber, forming the mixture into one. The wadding board is heat treated to cause the binder fiber to bind to the filling bond at intersection points between the coated polyester fibers. 6. A process according to claim 5, characterized in that the binder fibers are of type 5 casing / core fibers, whereby the casing constitutes the binder and the core remains in the bonded wadding plate to provide points for bonding with the coated polyester fiber filling. 7. A method according to claim 5, characterized in that one-component binder fiber is used, whereby the binder binds the coated polyester fiber filling at the crossing points. Process according to any of claims 5-7, characterized in that the mixture is according to some of claims 2-4. 9. Polyester fiber wadding pad with improved pourability, moisture transport, soft bonding and flammability, characterized in that the wadboard has been bonded through the use of binder fibers, and that the polyester fibers are coated with a smoothing agent made of substantially resilient polyurethane. (alkylene oxide). Wadding disc according to claim 9, characterized in that the smoothing agent is defined in accordance with any of claims 2-4. • «» »·» m * m, m · ► # «· t> · · n * * m •