TWI221867B - Method for processing uni-transversal highly extended nonwoven clothes - Google Patents

Abstract

A method for processing uni-transversal highly extended non-woven clothes comprises: using a processing device to heat a thermally adhered non-woven cloth to a temperature above the softening point of the thermoplastic fiber; meanwhile, subjecting the non-woven cloth to a longitudinal drawing at a specific draw ratio in a condition where the drawing rate of less than 10 meters per minute, based on 1 meter of the original cloth, such that the width of the original cloth is reduced to less than 60%, and a nonwoven cloth product with a smooth surface, a transversal elongation of more than 100%, and more than 50% of elasticity.

Description

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Field of the Invention: The present invention relates to a single-family 6 4 which relates to a method of processing the original two-woven fabric, the softening speed of two f 3 thermoplastic fibers between the specialization point (Td) and the melting point (Tm). The ratio and the fixed rate are two targets per minute per minute, and at the same time with a fixed stretch rate &, a new gauge of 2 ”can be obtained with a low stretch of less than 10 meters. The grid's contention is highly elastic. Non-woven background: With the progress of the industrial and commercial industry, products, especially the consumer sanitary consumables α gradually: replace the traditional use: yarn of diapers, sanitary napkins, medical supplies; use; = baby cloth, surgical gown , Headgear, anti-mouthpiece ^^ Cloth ^ Surgical masks, surgical trousers, disposable socks and other items need to be said: ^^^^ :: The development of disposable underwear and cloth industry has become a difficult project . n Such fabrics can be mechanically tiled with short fibers or directly in the plastic step; the fibers extruded under the physical state are tiled into a cloth, and the heat-bonded system = hot-pressed rollers or other hot side 4 The fiber junction is thermally adhered to the material. Another problem that needs to be solved is non-woven fabrics. Second: The elasticity can improve the product's strength, comfort, and excellent characteristics of the thumb shape. Generally, the actual requirements of disposable items can be discarded.的 弹 #, are only within the range of 30-50%, for example, 24-inch panty disposable pants only stretch

1221867 V. Description of the invention (2) = that the adhesive is suitable for 36 inches of waist circumference. In the past, the method was added when bonding non-woven fabrics. Tf cloth has elasticity to increase strength and comfort, but this method makes the cloth more comfortable and comfortable. It has a little stretchability and conformability, but also has a low softness. The recovery force of the shrinkage fabric is very poor. Hassenboehler and others have disclosed a combined heat treatment and The mechanical properties of non-woven fabrics are modified by stretching in mm. Ί ΐ Carcass 2 pores between fibers are reduced, and the difference in pore size becomes closer. The elongation rate is based on changing the type of non-woven fabric. And the main treatment for causing the gap to shrink, especially the processing method with a draw rate ratio higher than 2500% / min, causes the gap reduction and the distribution of the non-woven fiber to shrink, which is conducive to improving the filtering effect. Ward's Taiwan Patent 0 95295, Chinese patent 21 ^ 96120523.7 and the most recent US patent No. 605117 7 apply heat treatment and mechanical force stretching to process at a low stretch rate ratio of 350-950% / min, in pursuit of non-woven stretch elasticity Continued Ward's low stretching rate ratio processing research found that a simpler device, different extension methods can be used, and that the lateral energy can be made greater than 100% and the extension can be 50% at a completely different temperature range. A new type of elastic non-woven fabric with retracted unidirectional transverse high ductility. The stretching device mentioned by Ward's is based on more than 4 take-up shafts and the progressive winding speed, resulting in stretching Tension, however, in the case of 4 take-up shafts, in order to meet the progressive stretching tension, continuous processing is not possible, and intermittent processing of a piece of cloth, a piece of cloth is necessary. Ϊ221867 Amendment No. 91109443 V. Description of the invention ( 3) A method for processing unidirectional high-stretch non-woven fabrics, which uses two sets of pressing rolls of front and back ^ as stretching devices to heat the original cloth to the thermal softening point (Td) and melting point (Tm) of the contained thermocopper fibers. The temperature range between) and p is fixed with a fixed stretch speed ratio and a fixed low-rate stretch ratio of less than 1,000% / min. A single-lateral high-stretchable elastic nonwoven fabric of the new specification can be obtained, After the above processing, it can be increased The softness, comfort and high elasticity of woven fabrics are high. ~ 〃 Summary of the invention: The main purpose of the present invention is a processing method of a unilateral high-strength non-woven fabric. Manufactured in the steps of feeding, front-pressing reel-shaft pressing, heat treatment, post-pressing reel-shaft stretching, and finished product harvesting; in particular, the heat-treatment system controls the temperature to the thermal thorn (Td) and melting point (Tm) of the thermoplastic fibers used ), At the same time, continuous s-shaped winding chain passes through the two sets of pressing reels, and the original fabric is stretched longitudinally through a fixed speed ratio of the front and back reels, and the stretching rate ratio is controlled to be per minute per meter The original f extension is less than 10 meters, so that the width of the original fabric can be reduced to 600% of the original width. The fabric surface is made of T ', and the fabric can be extended by more than 100% in the transverse direction, and has a resilience of more than 50%. New kind of non-woven. A secondary object of the present invention is to provide a device for manufacturing a single horizontal and high ductility non-woven fabric, which includes a sending wheel, a front pressing reel, a rear pressing reel, a finished product winding wheel, and a heat treatment device. Among them, the two sets of pressing scrolls before and after each 'are formed by two scrolls, which are a total of 4 reels, and the original cloth passes by the secret mail. The rear pressing reel has a winding speed of 1 · 0—i · 6 times that of the front pressing reel. The nonwoven fabric is heat-treated at a traction speed of 10 to 200 m / min.

1221867 V. Description of the invention (4) Set and maintain the stretching rate ratio of less than 丨 0 meters per meter per meter of the original cloth; the heat treatment device is set before the post-pressing reels, and can be before the two sets of pressing reels or between. j Another important purpose of the invention is to provide a uni-directional high-stretch non-woven fabric, in which the heat-bonded non-woven fabric is suitable for processing non-woven fabrics made of spunbond method, heat pressure loss, hot air method, melt-blowing method and the above-mentioned composite methods. Weaving ^. In order to achieve the above-mentioned object of the present invention, the present invention provides a single horizontal high ductility = woven fabric processing method. The thermally bonded non-woven fabric is heat-treated to control the temperature at the thermal softening point (Td) of the thermoplastic fiber used and Between the melting point (Tm), a device for manufacturing a single horizontally high-stretchable fabric including a sending wheel, a front pressing reel, a rear pressing reel, a finished winding reel, and a heat treatment device is provided through a fixed front and rear reel speed. The original fabric is stretched and stretched longitudinally, and the stretching rate is controlled so that the extension of the original fabric per meter per minute is less than 〇 = the original fabric width can be reduced to less than 60% of the original width. The above-mentioned and flexible step-by-step method is described below. This invention will be described later when it is published. ^ Detailed description of the invention is shown in the first figure. A method for manufacturing a single horizontal high elongation process is sent through the original cloth. Pre-pressed winding and weaving: processing steps such as processing, post-pressed winding and stretching, and finished product harvesting. *, ', ^ See the second and third figures, a device for manufacturing a single horizontal high-elongation', which includes: a front press roll 3 and a post press roll 1221867 _ __ case number 91109443__ color 3日 丝 __ V. Description of the invention (5) Shaft 7, finished product winding wheel 9 and heat treatment cluster 5; the original cloth 2 is released from the sending wheel 1 'wound in an S-shape and passed through the winding roller 3 of the front pressing reel 3 1. 3 3, and then pass through the heat treatment device 5 'The heat treatment device 5 is set before the post-pressing reel 7 and can be before or between the two sets of pressing reels, the cloth body passes through the oven and the take-up wheel 3 1, 3, 7 The stretching of 1, 7 and 3 is wound by mail and the winding wheel 7 and 73 of the reel 7 are pressed. The finished product is wound by the winding wheel 9 and each winding wheel 31, 33, Π, 73 is covered. There are rubber or other surface substances 4 to increase the friction force; wherein the front and rear two groups of reels 3 and 7 are pressed, and each group is formed by two reels to form a total of 4 reels. — 丨. 6 times the winding speed of the front pressing reel 3, passing the non-woven fabric through the heat treatment device 5 at a traction speed of 10 to 200 m / min and keeping the stretching rate ratio per minute The original fabric stretches less than 10 meters per meter; the heat treatment device 5 is arranged in the rear pressing rolls ^ front 7 and can be before or between the two sets of pressing rolls 3 and 7. — Refer to the fourth figure, a device for manufacturing a single horizontal high-stretchable non-woven fabric 'the original cloth 2 is released from the sending wheel 1 and passed through the winding wheel 3 of the front pressing reel 3 and 33 and the winding of the rear pressing reel 7 At 7 o'clock and 73 o'clock, the baboon twined. Example description: The raw fabric is a heat-treated non-woven fabric, and the temperature is controlled between the thermal softening point (Td) and the melting point (Tm) of the thermoplastic fiber used by processing. Spunbond method, hot pressing method, hot air method, melt-blowing method, and the above-mentioned composite methods. The above-mentioned non-woven fabrics are those having laminated, coated or laminated thermoplastic elastic films. Ward's glass transition point is the starting point of processing temperature. Here, the commonly used thermally bonded non-woven fabrics are divided into glass transition point (Tg) and processing temperature range as follows:

_ 1221867 Case No. 91109443 _ ^ __ M Daily amendment V. Description of invention (6) Material of original cloth Tg (Celsius) Processing patent scope Polyethylene (PE)-80 -80 to -60 Polypropylene (PP) -20-2 0 to 〇Polyester (PET) 70 7 0 to 90 0 Polyamide-6 (PA-6) 40 4 0 to 6〇 Polyamide-6, 6 (PA-6, 6) 50 5 0 to 7 0 Processing in this case The temperature is controlled between the thermal softening point (Td) and melting point (Tm) of the thermoplastic fibers used in the original cloth. The same thermal bonding of the non-woven fabric is listed below. The Td and Tm are as follows: Raw material Td (Celsius) Tm (Celsius) Polyethylene (PE) 110 140 Polypropylene (PP) 120 165 Polyester (PET) 190 260 Polyamine-6 (PA-6) 165 230 Polyamine-6, 6 (PA-6, 6) 220 265 j The temperature range shown in the above column shows that although the temperature values of various brands and different grades of 敎 f I and 维 are different, the differences between the glass transition points Tg and Γ ^ 1 j values are above 100 degrees Celsius There will be no overlap and no confusion. The processing temperature is very clear in this case. The new cloth processed by Tai Chong m 疋 in a completely different case from the case, the new method of this case, the cloth width shrinks by about half.

Page 9 V. Description of the Invention ^^ 1 ° 9443 Modification The appearance of the cloth surface IM has been adjusted by ΐ. As shown in Table 1. 1 QQ wood-processed fabrics have a horizontal unidirectional stretchability of up to 50% on the new regulations. They belong to a type of non-continuous non-woven material that has never been described or made, and should be properly referred to as single lateral high stretch. Sexual elastic fiber 4 cloth. The results are shown in Table 2. According to the experimental results, the present invention heats the original cloth to a temperature range between the thermal softening point (Td) and the melting point (Tm) of the contained thermoplastic fibers, and at the same time with a fixed stretching speed ratio and a fixed The original fabric with a low stretch rate of less than ιm can extend to a new specification of unidirectional high-strength elastic nonwoven fabric. shape

1221867 _Case No. 91109443_ Year Month Day Amendment Brief Description of Drawings The first figure shows the flow chart of the processing method of the present invention. The second figure shows a schematic diagram of the device of the invention. The third diagram shows another schematic diagram of the device of the present invention. The fourth figure shows a side view of the device of the invention. Drawing number description 1 sending wheel 2 original cloth

3 Front pressing reel 5 Heat treatment device 7 Back pressing reel 9 Finished product winding wheel 31 Reeling wheel 33 Reeling wheel 71 Reeling wheel 73 Reeling wheel

Page 11 1221867 Table 1 Raw cloth, original cloth basis weight, original cloth width, cloth basis weight, cloth width, cloth width G / mz m G / mz m PP spunbond 15 2.1 23 1 15 2.1 26 0.8 20 2.1 30 1 20 2.1 38 0.8 30 2.1 46 1 30 2.1 57 0.8 42 2.1 68 1 42 2.1 80 0.8 60 2.1 90 1 60 2.1 114 0.8 PET spunbond 50 3.2 76 1.6 50 3.2 104 1.2 PA spunbond 22 1.6 35 0.8 22 1.6 47 0.6 PP spun SMS cloth 15 2.1 22 1 40 2.1 56 1 55 3.2 74 1.6 PP hot press cloth 15 2 21.5 1 35 2 51 1 55 2 78 1 65 2 93 1 PP meltblown cloth 30 1.6 43 0.8 50 16 72 0.8 PE hot air cloth 18 2 26 1 30 2 44 1 50 2 72 1 60 2 90 1 70 2 105 1 1221867 Table 2 The recovery point G / m2%% of the release rate after the fabric ’s basis weight is stretched to 200% and (recovery %) PP spunbond 23 117 132 (68) 30 120 127 (73) 45 118 124 (74) 68 123 129 (71) 90 127 120 (80) PP hot-pressed cloth 22 117 147 (53) 50 125 141 (59) 75 128 138 (62) 95 131 134 (66) PE hot air cloth 25 113 143 (57) 75 124 139 (61) 105 125 135 (65) PP meltblown cloth 43 98 144 (56) 70 102 141 (59) PET spunbond 75 115 135 (65) PA spunbond 35 108 127 (73)

Claims (1)

1221867 j No. 9110Q4M VI. Application for patent scope 1 · A single-lateral high-stretch non-woven fabric processing method, which uses a heat-bonded non-woven fabric as the original fabric, sends it out through the original fabric, presses the pre-rolling shaft, heat treatment, and post-presses the roll. Manufactured by steps such as axial drawing, finished product harvesting; especially in this heat treatment step, the temperature is controlled between the thermal softening point and melting point (Tm) of the thermoplastic fiber used in the original cloth, and the continuous winding is in an S shape After the two sets of pressing reels, the original fabric is stretched longitudinally through a fixed speed ratio of the front and rear reels, and the stretching rate ratio is controlled to extend less than 10 meters per meter per meter of the original fabric & 'make the original The width of the cloth can be reduced to 60% of the original width. 2 · As the scope of patent application, woven fabrics are manufactured by spunbonding method. The processing method according to item 1, wherein the hot-bonding non-hot-pressing method, hot air method, melt-blowing method, and the above-mentioned compound 3 · Rushen cloth weaving equipment 4 · A sending wheel device; Pull 5 · Rushen set up room. Please apply for the lamination, manufacture single-horizontal, and front pressing, where the front pressing takes up a 200m / dividing rate ratio, please refer to the processing method described in item 1 of the rear pressing circle, where the thermal bonding is not coated = or Laminated with thermoplastic elastic film. Non-woven device with high ductility, including: reel, rear pressing reel, finished product winding wheel and heat treatment, two sets of pressing reel, each group consists of two reel-shaped shafts with 1.0-1.6 times the front The reeling speed of the pressing reel and the pulling speed of the non-woven fabric pass through the heat treatment device and extend the original cloth per meter per minute by less than 0 meters. The installation described in item 4, wherein the heat treatment device can be stretched to the south before the two sets of reels or a single bifurcated non-woven fabric before the reel, which is based on the heat-bonded non-woven fabric. 1221867 _Case No. 91109443 __ Year 6, month and month of amendment 6. Fabrics for which patents are applied, manufactured through the steps of sending out the original cloth, stretching the front pressing reel, heat treatment, stretching the back pressing reel, and harvesting the finished product; especially during the heat treatment step The temperature is controlled between the thermal softening point and the melting point (T m) of the thermoplastic fiber used in the original cloth, and at the same time, it is continuously wound by post through the two sets of pressing reels before and after passing through the fixed front and rear reel speed ratio. The original fabric is stretched longitudinally, and the stretching rate is controlled. The original fabric extends less than 10 meters, so that the original fabric Gong Xu At A is a mother knife ® te nft ^ 丁. 玲 The horizontal unidirectional high ductility is not; J degree Small as the original width = v sleeves and above, and has = above and its ^ elasticity is flat and can extend horizontally