1377271 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種異型中空斷面合成纖維。具體言之，本 發明涉及一種其纖維斷面呈内含四個中空空孔的類方型斷面 短纖維，其具有高中空率、高水洗彈性回復率、高回彈性、 高保暖性及較高拉力與強度等優點。 【先前技術】 大部分的合成及纖維素的纖維係藉由「吐出」方式製得 鲁 一迫使漠且黏稠之液態物經過喷嘴(spinneret)上微小之孔洞 以形成半固體聚合物之連續纖維絲。製造大部分纖維之喷嘴 係相似的，其原則上類似於浴室之蓮蓬頭。一喷嘴可包含一 至數以百計之孔洞。於纖維絲經由噴嘴之孔洞喷出時，液體 聚合物係先轉變為膠態而後再固化。此種吐出及固化纖維絲 之程序稱為「紡絲(spinning)」。 早期中空纖維都是圓形單孔，而目前為了提高纖維的多 變性及增加功能性，於是異型斷面中空纖維不斷被研發出來 鲁 ’包括二角形單孔、多孔中空(4孔、7孔）、圓形多孔等。 例如歐洲專利EP0067684及日本專利特開昭57-210013提 到一種非圓形4孔中空形狀纖維、中空率約15〜35%鋸齒狀捲 縮型態之聚醋纖維。然而，依此方法僅能得到趨近圓形斷面 之中空’且回彈性較差。 曰本專利特開2003-55838提到添加少量聚乳酸等第三成 份之3〜8個中空孔洞、中空率約25〜60%之聚酯纖維。然而， 依此方法製得之多孔中空纖維，在紡絲喷嘴吐出前需以較低 4 ^皿方式來保持多孔中空狀態，導致聚g旨吐it}不良率提高且 夕孔中空之噴嘴設計價格昂貴、複雜且管理不易。 办中國專利公告號CN2418139Y號專利敘述一種具有4孔 中工之圓形斷面。但上述方法只能得麵形或類似圓形 孔中二纖維且其織物強度低、回彈性較差。 言可喻，纖維的中空孔洞數愈多愈難以製造，而噴嘴 之=計亦更為複雜、昂貴且管理不易。此外，為了維持多孔 中，保=率，需以較低紡溫方式紡絲，從而聚酯吐出不良率 夺Ik之提***，將梳好之纖維束置於天鵝絨板 上，以夾子夾出50根組成一組共計5組，將棉樣置於微量 天平秤重。 9 計算： (a)丹尼數 丹尼=(9000 δ)/(Lx 50) 2.斷面異型度保持率之測量： 用光學顯微鏡將單根纖維放大働倍，量測矩型斷面對 線長度1/2(即A)，及量測1/2之方型斷面之寬度(即B)， 按照下列公式得到斷面異型度保持率。1377271 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a profiled hollow section synthetic fiber. Specifically, the present invention relates to a square-shaped cross-section short fiber having a fiber cross section and containing four hollow pores, which has high hollow ratio, high washable elastic recovery rate, high resilience, high heat retention and comparison. High tensile strength and strength. [Prior Art] Most of the synthetic and cellulose fibers are produced by the "spit" method to force the indifferent and viscous liquid to pass through the tiny holes in the spinneret to form a continuous filament of semi-solid polymer. . The nozzles that make most of the fibers are similar and are in principle similar to the shower heads of bathrooms. A nozzle can contain from one to hundreds of holes. When the filaments are ejected through the orifices of the nozzle, the liquid polymer is first converted to a colloidal state and then solidified. The procedure for discharging and curing the filaments is referred to as "spinning". In the early days, hollow fibers were all circular single holes. At present, in order to improve the variability and increase the functionality of the fibers, the hollow fiber of the profiled section has been continuously developed. It includes a single-hole, porous, hollow (4 holes, 7 holes). , round porous and so on. For example, a non-circular 4-hole hollow-shaped fiber and a polyester fiber having a hollow ratio of about 15 to 35% in a zigzag-shaped shape are proposed, for example, in the European Patent No. EP 0 076 864 and the Japanese Patent Laid-Open No. Sho 57-210013. However, according to this method, only the hollow portion approaching the circular cross section can be obtained and the resilience is poor. Japanese Laid-Open Patent Publication No. 2003-55838 discloses a polyester fiber having a small amount of 3 to 8 hollow holes of a third component such as polylactic acid and a hollow ratio of about 25 to 60%. However, the porous hollow fiber obtained by the method needs to maintain a porous hollow state in a lower 4^ dish before the spinning nozzle is discharged, resulting in an increase in the defective rate of the polyg and the nozzle design price of the hollow hole. Expensive, complicated and difficult to manage. The patent of Chinese Patent Publication No. CN2418139Y describes a circular section having a 4-hole intermediate work. However, the above method can only obtain two fibers in a surface shape or a similar circular hole and has low fabric strength and poor resilience. It can be said that the more the number of hollow holes in the fiber, the more difficult it is to manufacture, and the nozzle is more complicated, expensive, and difficult to manage. In addition, in order to maintain the porosity, the rate of the guarantee is required to be spun at a lower spinning temperature, so that the rate of defective polyester spit is taken as an improvement. However, the number of hollow holes is not as high as possible. The number of holes in the fiber is closely related to the fiber's fineness and product requirements. At the same time, i needs to consider the product spinning performance and its price. Yet another object of the present invention is to provide a square short fiber such as a four-hole hollow. In addition to retaining the characteristics of the towel line, the short fiber has excellent spinning properties and excellent water fineness, so that the competitive advantage of the hair ray is further increased. [Invention] The present invention relates to a fiber thereof. The square hollow fiber of the four-hole hollow type is characterized in that the square short fiber satisfies the following relationship: 1.10 S section profile (A/B) $ 1.414 16% $ 4x single hole hollow ratio $ 35% where A is 1/2 of the diagonal length of the section and B is 1/2 of the section width (as shown in Figure i). 1377271 DETAILED DESCRIPTION OF THE INVENTION The present invention provides a square-like four-hole hollow staple fiber. In the present invention, the term "square-shaped four-hole hollow short fibers" means a short fiber having a rectangular or square-like cross section of four holes, as shown in Figs. 2 and 3. / In the preferred embodiment of the present invention, the square short fibers satisfy the following relationship: U0 $section profile (A/B) $ 1.414 16% $ 4x single hole hollow ratio $ 35% where A is The length of the diagonal of the section is 1/2, and B is 1/2 of the width of the section. In another preferred embodiment of the present invention, the square hollow short fibers of the present invention have a rectangular cross section. Preferably, the square hollow short fibers of the present invention have a square cross section. In the present invention, the square hollow short fibers such as (4) have four hollow holes. The square hollow short fiber of the present invention has the advantages of high hollow ratio, high washable elastic recovery rate, high resilience, high heat retention, and high tensile strength and strength. Since the cross section of the invention is a square structure, when the force is applied or twisted, the rebounding force after the release of the waste force is large, and the cross structure of the inner portion thereof can improve the restoring force and the recovery rate, compared with the circular shape. The fiber of the hollow section has a better recovery rate, thus increasing its rebound function. In another preferred embodiment of the present invention, the raw material of the square hollow short 6 fiber of the present invention is mainly composed of polyester and modified polyester, and polypropylene, Nylon 6, Nylon 66, etc. may also be used. . In another preferred embodiment of the present invention, the square hollow short fiber of the present invention has a profile (A/B) of between 1.10 and 丨.414, preferably 1.16 to 1.414 °. In another preferred embodiment, the square hollow staple fibers of the present invention are characterized by a total hollow ratio of between 16% and 35%. When the hollow ratio is greater than 35%, the fiber tube wall is broken, the poly S is intended to improve the defective rate of spitting, and the spinning operation is poor. 'In other respects', when the hollow ratio is less than 16〇/〇, the hollow fiber ratio is lowered, and the lotus raw towel is w Reduced and reduced insulation. The preferred total hollowness control range is from 20 to 30%. In another preferred embodiment of the present invention, the square hollow fiber of the present invention has a fineness of 2 or more, preferably 3 to 25 denier, and most preferably 3 to 2 angstroms. The hair of the square hollow fiber of the present invention may generally include all staple fiber lengths, i.e., 22 to brain face, preferably 38 to 90 mm. In another preferred embodiment of the present invention, the number of spiral crimps of the hollow fiber of the present invention is in the range of 4 to 1 〇 / 25 mm. In another preferred embodiment of the invention, the crimped form of the square hollow fiber of the present invention is helical. In another preferred embodiment of the present invention, the crimped form of the square hollow 1377271 fiber of the present invention is serrated. In another preferred embodiment of the present invention, the square-shaped hollow short fibers of the present invention have a compression recovery ratio of more than 90%. The square hollow short fiber of the present invention can be obtained by the method comprising the following steps: The molten polyester polymer (such as PET) is spit out through a specially designed four-hole two-nozzle, and then quenched by cold air. The molten polymer is cooled into a strand, and then the extension, wrinkling, oiling, drying, setting, cutting, and packing procedures of the present invention can be used to obtain the short fiber of the present invention. The purpose of the extension step is to convert fibers of relatively weaker strength to those with larger molecular orientations to produce higher strength. In a preferred embodiment of the present invention, the present invention extends to the desired Danny number by means of a fiber extension frame. Since the expanded fiber may shrink after heating, a heat setting step is required to reduce the residual stress in the fiber, accelerate the crystallization of the fiber, and improve the stability of the fiber. In a preferred embodiment of the invention, the heat-setting step can be carried out using a hot-ruthless drum. After passing through the high-pressure steam, the treated fiber is cooled to room temperature by means of a cooling drum. The enemies are used to increase fiber cohesion and improve the hand. In a preferred embodiment of the present month, the square hollow staple fibers of the present invention can be maintained at a fixed tension via a bounce drum and then sent to the enemy machine for the creping step. The length of the short fibers depends on the type of fiber. In a preferred embodiment of the present invention, in the embodiment of the invention, the present invention can be cut by cutting, as exemplified above, from about 22 to about 0.001, preferably from about 38 to about 3%. _. The size of the hole on the nozzle and the irregular shape of the autumn _. In the present invention, the present invention _ square gamma hollow short fibers can be produced by a nozzle having four sets of T-shaped slits (as shown in Fig. 4). The square-shaped four-hole hollow staple fiber of the invention can be used for materials such as air-passing; sanitary articles such as diapers, rags, non-woven fabrics, etc.; bedding such as mattresses... 4, packaging materials; building materials; soil and water conservation materials ..·Wait. The invention is described in detail by the following examples, which are not intended to limit the scope of the invention in any way. Although numerical ranges and ranges of values are set forth in the broad scope, the present invention herein recites the numerical values in the particular embodiments as much as possible. [Embodiment] The physical properties of the products obtained in the examples and comparative examples of the present invention were measured and evaluated according to the following methods: h denier test method: 5 bundles of 0.5 g of each bundle were taken from the sample (note that the hand must be kept) Drying] 'The fiber bundle is flattened with a carding machine, and the combed fiber bundle is placed on a velvet plate, and 50 sets of clips are taken out to form a total of 5 sets, and the cotton sample is placed on a microbalance to weigh. 9 Calculation: (a) Danny's number Danny = (9000 δ) / (Lx 50) 2. Measurement of the retention of the profiled shape: The single fiber is magnified by an optical microscope and the rectangular section is measured. The line length 1/2 (i.e., A), and the width of the square section of the measurement 1/2 (i.e., B), the cross-sectional shape retention rate was obtained according to the following formula.
斷面異型度保持率=A/B 3. 中空率測試法： 用光學顯微鏡將單根纖維放大4〇〇倍，量測2〇個單纖 中空總面積與單纖斷面總面積之比值平均值。 1377271 量其四個角之高度為A ; (5)加500克重錘30秒後；測量其四個角之高度為 B ;以及 ⑹除去500克重錘放置三分鐘後，測量其四個角之高 度為C。 計算： _ 壓縮比(％) = (A-B)/A X 100 0 壓縮回復率(％) = (C-B)/(A-B) X 100 其中A為原棉高度，B為加荷重30秒後棉之高度，以 及C為除去荷重30秒後棉之高度。 5.水洗後彈性回復率測試法： (1)取棉各30克疏棉後置於15 cm χ 15 cm容器内，用 1500克重錘輕壓20秒後測容器内棉回復後高度； • (2)原樣本再用50°C熱水水洗10分鐘同樣將棉網置於 15 cm X 15 cm容器内，用1500克重錘輕壓20秒後測容器内 棉網回復後高度；以及 (3)重複前述水洗步驟十次。 實例1 : 將熔融態聚酯聚合物經特殊設計之四孔中空四角型噴 絲板吐出，再經過冷卻風3 m/sec驟冷，紡絲速度700〜900 11 1377271 m/mm成絲條。將絲條經延伸溫度7〇〜9〇<>c、延伸倍率3 〇、 HOC定型處理、切棉、打包等步驟’制7d*34_具有四 孔中空類方型短纖維。其特性如下表1及表2 ^ 實例2 : 將熔融態聚酯聚合物經特殊設計之四孔中空四角型喷 絲板吐出，再經過冷戟4Gnm/hr驟冷並纺成雜。將絲條 經延伸溫度7G〜9(TC、延伸倍率3.5、16(TC定型處理、切棉、 打包等步驟，得到7〜64_具有四孔巾_方^级纖維。 比較例1 : 依實施例1步騾’將噴絲孔改用圓形中空喷絲板吐出。 熔融態聚酯聚合物經中空噴絲板吐出，得到具有單孔中空合 成短纖維，得到7d*34 mm具有單一中空孔洞之圓型短纖維。 該纖維之性質係列舉於如下之表丨及表2。 短纖維及先前技藝之纖維的性質 項目 ———--- 實例1 比較例1 丹尼 --.— 7 7 纖維強度 ---- 4.3 3.5 __長度 34 34 12 1377271Section profile retention rate = A/B 3. Hollow rate test method: The single fiber is magnified 4 times by optical microscope, and the ratio of the total area of 2 single fibers and the total area of the single fiber section is measured. value. 1377271 The height of its four corners is A; (5) After adding 500 grams of weight to 30 seconds; measuring the height of its four corners is B; and (6) after removing the 500 gram weight for three minutes, measuring the four corners The height is C. Calculation: _ compression ratio (%) = (AB) / AX 100 0 compression recovery rate (%) = (CB) / (AB) X 100 where A is the height of the raw cotton, B is the height of the cotton after 30 seconds of loading, and C is the height of the cotton after removing the load for 30 seconds. 5. Elastic recovery rate test after washing: (1) Take 30 grams of cotton each and place it in a 15 cm χ 15 cm container, and press the 1500 gram weight for 20 seconds to measure the height of the cotton inside the container after recovery; (2) The original sample is then washed with hot water at 50 ° C for 10 minutes. The cotton mesh is placed in a 15 cm X 15 cm container, and the height of the cotton web in the container is measured after gently pressing with a 1500 g weight for 20 seconds; 3) Repeat the aforementioned water washing step ten times. Example 1: The molten polyester polymer was spouted through a specially designed four-hole hollow square-shaped spinneret, and then quenched by a cooling air of 3 m/sec, and a spinning speed of 700 to 900 11 1377271 m/mm into a strand. The strands are made of a 7-hole hollow type short fiber having a stretching temperature of 7 〇 to 9 〇 <> c, a stretching ratio of 3 〇, HOC setting treatment, cotton cutting, packing, and the like. The characteristics are shown in Table 1 and Table 2 below. Example 2: The molten polyester polymer was spouted through a specially designed four-hole hollow square-shaped spinneret, and then quenched by cold enthalpy at 4 Gnm/hr and spun into impurities. The filaments were subjected to an elongation temperature of 7 G to 9 (TC, stretching ratios of 3.5, 16 (TC setting treatment, cotton cutting, packing, etc., to obtain 7 to 64 _ with four-hole towel _ square fiber). Comparative Example 1: According to the implementation Example 1 Step 骡 'Spray the orifice to a circular hollow spinneret. The molten polyester polymer is discharged through the hollow spinneret to obtain a single-hole hollow synthetic short fiber, which gives a single hollow hole of 7d*34 mm. Round short fibers. The properties of the fibers are listed in the following table and Table 2. Properties of short fibers and fibers of the prior art———-- Example 1 Comparative Example 1 Danny--.— 7 7 Fiber Strength---- 4.3 3.5 __ Length 34 34 12 1377271
中空率 29 30 卷曲數 8 4 壓縮比 47 45 壓縮回復率 97 85 斷面異型度 1.38 1.0 保持率 紡絲性 極佳 尚可 ------ ------Η 斷面 王 ◎ ' J------ ---J 表2:水洗後彈性可回復率之比較數據 0 2 實施例1 (棉 網回復高度 cm) 11.4 10.7 10.3 9.8 水洗之次數Hollow ratio 29 30 Curl number 8 4 Compression ratio 47 45 Compression recovery rate 97 85 Section profile 1.38 1.0 Retention rate Spinning is excellent ------ ------ 断面 Section Wang ◎ ' J------ ---J Table 2: Comparison data of elastic recoverability after washing 0 2 Example 1 (cotton net recovery height cm) 11.4 10.7 10.3 9.8 Washing times
比較例1 (棉 網回復高度: cm) 10.3 9.3 8.7 8.2 8.2 7.9 7.5 7.3 本發明係經由前開實例之描述以使本發明更易於瞭解 ，然而並，躺料實例_本發明。 中具有通f知識者在不雜本㈣之精神且依本發 1377271 均應視為仍落於本案申 點的情況下所作之任何改變 請專利範圍所界定範圍之中:> 【圖式簡單說明】 圖1絲示本翻_之_異财_量，其中斷面 異型度為A/B。 圖2係表示本發明之類方形四孔中空短纖維之斷面。Comparative Example 1 (cotton web recovery height: cm) 10.3 9.3 8.7 8.2 8.2 7.9 7.5 7.3 The present invention is made easier by the description of the preceding examples to make the present invention easier to understand, however, the present invention is exemplified. Any change made by those who have knowledge of the knowledge of (b) in accordance with the spirit of this (4) and in accordance with this issuance should be deemed to remain in the scope of the patent application: > Description] Figure 1 shows the _ _ _ _ _ amount, the section profile is A / B. Fig. 2 is a cross section showing a square four-hole hollow short fiber such as the present invention.
圖3係本發明之類方形四孔中空短纖維之一具體例的斷 面照片。 圖4係表示用以製備本發明之類方形四孔中空短纖維之 喷嘴的例·示斷面。 圖5係表示本發明實施例1與比較例1之纖維於水洗後彈 性可回復率之比較數據。 【主要元件符號說明】 益Fig. 3 is a cross-sectional photograph showing a specific example of one of the square four-hole hollow short fibers of the present invention. Fig. 4 is a view showing an example of a nozzle for preparing a square four-hole hollow short fiber of the present invention. Fig. 5 is a graph showing comparative data of the elastic recoverability of the fibers of Example 1 and Comparative Example 1 after washing with water. [Main component symbol description]