Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JPS628527B2 - - Google Patents
[go: Go Back, main page]

JPS628527B2 - - Google Patents

Info

Publication number
JPS628527B2
JPS628527B2 JP54127852A JP12785279A JPS628527B2 JP S628527 B2 JPS628527 B2 JP S628527B2 JP 54127852 A JP54127852 A JP 54127852A JP 12785279 A JP12785279 A JP 12785279A JP S628527 B2 JPS628527 B2 JP S628527B2
Authority
JP
Japan
Prior art keywords
yarn
guide
less
crystal grain
grain size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP54127852A
Other languages
Japanese (ja)
Other versions
JPS5653222A (en
Inventor
Yoshiki Masaki
Hiroshi Kuwajima
Yukinobu Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP12785279A priority Critical patent/JPS5653222A/en
Publication of JPS5653222A publication Critical patent/JPS5653222A/en
Publication of JPS628527B2 publication Critical patent/JPS628527B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

産業上の利用分野 この発明は、多結晶セラミツクスからなるガイ
ドを使用して仮撚糸を案内する方法に関する。 従来の技術 仮撚糸の案内には、従来、多結晶セラミツクス
からなり、かつ表面の中心線平均粗さが0.5〜2
μであるような糸ガイドを使用している。しかし
ながら、このような、中心線平均粗さが0.5〜2
μであるような糸ガイドを使用して仮撚糸を案内
すると、糸に毛羽を発生させて糸質を低下させた
り、糸を傷付けて糸ガイドの接糸面に糸粉が堆積
するという問題がある。 発明が解決しようとする問題点 この発明の目的は、従来の方法の上記欠点を解
決するもので、仮撚糸を、糸に毛羽を発生させて
糸質を低下させたり、糸を傷付けて糸ガイドの接
糸面に糸粉が堆積するのを防止して案内する方法
を提供するにある。 問題点を解決するための手段 上記目的を達成するためのこの発明は、多結晶
セラミツクスからなり、かつ表面の中心線平均粗
さが0.2μ以下であり、平均結晶粒径が10μ以下
である糸ガイドを使用して仮撚糸を案内する仮撚
糸の案内方法を特徴とするものである。 この発明にいう「中心線平均粗さ」とは、JIS
B 0601−1966で定義される表面粗さである。ま
た、「平均結晶粒径」とは、糸ガイドの表面の拡
大顕微鏡写真をとり、その写真上の任意の一定面
積内に存在する結晶粒の面積を、結晶粒の大きな
ものから小さなものへと、その面積の和が上記一
定面積の二分の一になるまで加え、その加算面積
をその結晶粒の個数で除して得た面積、すなわち
結晶粒の平均面積の円を想定し、算出したもので
ある。すなわち、 S1+S2+……+So=(1/2)・S …… ΣSo/n=(1/4)・π・d2 …… d=2・(ΣSo/π・n)1/2 …… ただし s:各結晶粒の面積 n:結晶粒の個数 S:任意の一定面積 d:平均結晶粒径 さて、この発明で使用する糸ガイドは、アルミ
ナ系、チタニア系、ムライト(3Al2O3
2SiO2)、スピネル(MgO・Al2O3)、炭化ケイ素
SiC)、窒化ケイ素(Si3N4)などの多結晶セラミツ
クスからなり、その形状は、通常、円筒状や丸棒
状である。しかして、その表面の中心線平均粗さ
は0.2μ以下でなければならない。その理由は、
仮撚糸は普通の撚糸にくらべて仮撚状態における
撚数が大変多く、糸ガイドの表面に対する接触面
積が小さいので、表面の中心線平均粗さを0.2μ
以下にすると摩擦係数が急激に下り、糸が傷付く
ことによる接糸面への糸粉の堆積を防止すること
ができるようになるからである。このような摩擦
係数の低下は、仮撚糸に特有のもので、普通の撚
糸や無撚糸においては、表面の中心線平均粗さが
0.2μ以下になると摩擦係数が急激に増大すると
いう、仮撚糸とは全く逆の現象がみられる。 また、この発明で使用する糸ガイドは、その表
面の平均結晶粒径が10μ以下でなければならな
い。すなわち、平均結晶粒径が10μを越えると、
毛羽の発生による糸質低下が著しくなる。その理
由は明らかでないが、表面の平均結晶粒径が10μ
を越えると、仮撚糸は加撚状態における撚数が大
変多いので、単糸が結晶粒による微細な凹凸の隙
間に食込むようになるためではないかと推定され
る。 次に、この発明の方法を実施例に基づいてさら
に詳細に説明する。 実施例 純度が99.0%および99.5%であるアルミナ粉末
を用い、それらアルミナ粉末にマグネシア粉末を
0.25重量%加えて十分混合した後1000℃で仮焼
し、さらに粉砕して粉末にした。 次に、上記粉末を、公知のラバープレス法を用
い、1000Kg/cm2の圧力下に円筒状に成形し、さら
に旋盤を用いて粗加工した後、1500℃、1600℃お
よび1700℃の温度で3時間焼成し、多結晶アルミ
ナ焼結体を作つた。 次に、上記焼結体の表面をダイヤモンド砥石お
よびダイヤモンドペーストを用いて超仕上げし、
表に示す6種類の糸ガイドを作つた。なお、この
糸ガイドは内径6mm、外径10mm、長さ40mmの円筒
状である。 次に、上記各糸ガイドに150デニール/30フイ
ラメント、加撚状態における1m当りの撚数が
3500であるポリエステル仮撚糸を400m/分の速
度で一定時間接触走行させ、糸粉と毛羽の発生状
況を調べた。試験結果を表に示す。
FIELD OF INDUSTRIAL APPLICATION This invention relates to a method for guiding false twisted yarn using a guide made of polycrystalline ceramics. Conventional technology False twisted yarn guides have conventionally been made of polycrystalline ceramics and have a surface centerline average roughness of 0.5 to 2.
I am using a thread guide that is μ. However, when the center line average roughness is 0.5 to 2
If a yarn guide such as μ is used to guide false twisted yarn, there are problems such as generating fuzz on the yarn and degrading the quality of the yarn, or damaging the yarn and causing yarn powder to accumulate on the grafting surface of the yarn guide. be. Problems to be Solved by the Invention It is an object of the present invention to solve the above-mentioned drawbacks of the conventional methods, and to prevent false-twisted yarn from generating fuzz on the yarn to deteriorate the quality of the yarn, or damaging the yarn to guide the yarn. It is an object of the present invention to provide a method for preventing and guiding yarn powder from accumulating on a welding surface of a yarn. Means for Solving the Problems In order to achieve the above object, the present invention is directed to a yarn made of polycrystalline ceramics, having a surface center line average roughness of 0.2μ or less, and an average crystal grain size of 10μ or less. The present invention is characterized by a method for guiding false twisted yarn using a guide. The "center line average roughness" referred to in this invention is JIS
It is the surface roughness defined in B 0601-1966. In addition, the "average grain size" refers to the area of crystal grains existing within an arbitrary fixed area on the photograph taken from an enlarged microscopic photograph of the surface of the thread guide, from the largest crystal grain to the smallest crystal grain. , the area is calculated by adding the areas until the sum becomes one-half of the above constant area and dividing the added area by the number of crystal grains, that is, assuming a circle with the average area of the crystal grains. It is. That is, S 1 +S 2 +...+S o = (1/2)・S... ΣS o /n=(1/4)・π・d 2 ... d=2・(ΣS o /π・n) 1/2... However, s: Area of each crystal grain n: Number of crystal grains S: Any fixed area d: Average crystal grain size Now, the thread guide used in this invention is alumina-based, titania-based, mullite ( 3Al 2 O 3
2SiO 2 ), spinel (MgO・Al 2 O 3 ), silicon carbide
It is made of polycrystalline ceramics such as silicon nitride (SiC) or silicon nitride (Si 3 N 4 ), and its shape is usually cylindrical or round rod-shaped. Therefore, the centerline average roughness of the surface must be 0.2μ or less. The reason is,
False twisted yarn has a much larger number of twists in the false twisted state than normal twisted yarn, and the contact area with the yarn guide surface is small, so the center line average roughness of the surface is set to 0.2μ.
This is because if the friction coefficient is set below, the friction coefficient will drop rapidly, making it possible to prevent yarn powder from accumulating on the welding surface due to damage to the yarn. This decrease in the coefficient of friction is unique to false twisted yarns, and in ordinary twisted yarns and non-twisted yarns, the center line average roughness of the surface is
A phenomenon completely opposite to that of false-twisted yarn is observed, in which the coefficient of friction increases rapidly when it becomes 0.2 μ or less. Furthermore, the yarn guide used in this invention must have an average crystal grain size on its surface of 10 μm or less. In other words, when the average grain size exceeds 10μ,
The quality of the thread deteriorates significantly due to the occurrence of fuzz. The reason is not clear, but the average crystal grain size on the surface is 10μ
It is presumed that this is because the number of twists in the false twisted yarn in the twisted state is very large when the value exceeds 100. Next, the method of the present invention will be explained in more detail based on examples. Example Using alumina powder with a purity of 99.0% and 99.5%, magnesia powder was added to the alumina powder.
After adding 0.25% by weight and thoroughly mixing, it was calcined at 1000°C and further ground into powder. Next, the above powder was formed into a cylindrical shape under a pressure of 1000 kg/cm 2 using a known rubber press method, and then roughly processed using a lathe, and then heated at temperatures of 1500°C, 1600°C and 1700°C. It was fired for 3 hours to produce a polycrystalline alumina sintered body. Next, the surface of the sintered body is superfinished using a diamond grindstone and diamond paste,
Six types of thread guides shown in the table were made. Note that this thread guide has a cylindrical shape with an inner diameter of 6 mm, an outer diameter of 10 mm, and a length of 40 mm. Next, each yarn guide has 150 denier/30 filament, and the number of twists per meter in the twisted state is
3500 polyester false twisted yarn was run in contact at a speed of 400 m/min for a certain period of time, and the generation of yarn powder and fuzz was examined. The test results are shown in the table.

【表】 上表から、表面の中心線平均粗さが0.2μ以下
であり、かつ平均結晶粒径が10μ以下である糸ガ
イドE,Fを使用した場合は、上記条件を満足し
ていない糸ガイドA,B,C,Dを使用した場合
にくらべて、糸に毛羽を発生させて糸質を低下さ
せたり、糸を傷付けて糸ガイドの接糸面に糸粉が
堆積するような不都合が極めて少ないことがわか
る。 一方、糸ガイドBおよびFについて、顕微鏡を
用いて表面の粗さの状態と結晶の状態を観察し
た。結果を第1図および第2図に示す。 糸ガイドBは、第1図イに示すように表面が粗
いが、糸ガイドFは、第1図ロに示すように中心
線平均粗さが0.2μ以下であるという条件を満足
する極めて緻密な表面を有している。また、第2
図イに示すように、糸ガイドBの平均結晶粒径
は、第2図ロに示す糸ガイドFの10μ以下という
値に比べて極めて大きい。 発明の効果 この発明の方法は、多結晶セラミツクスからな
り、かつ表面の中心線平均粗さが0.2μ以下であ
り、平均結晶粒径が10μ以下である糸ガイドを使
用して仮撚糸を案内するものであり、実施例にも
示したように、糸に毛羽を発生させて糸質を低下
させたり、糸を傷付けて糸ガイドの接糸面に糸粉
が堆積するといつた不都合が極めて少ない。
[Table] From the table above, when using yarn guides E and F whose surface center line average roughness is 0.2μ or less and average crystal grain size is 10μ or less, yarn that does not satisfy the above conditions Compared to the case where guides A, B, C, and D are used, there are inconveniences such as generating fuzz on the yarn and reducing the quality of the yarn, and damaging the yarn and causing yarn powder to accumulate on the wept surface of the yarn guide. It turns out that there are very few. On the other hand, regarding thread guides B and F, the state of surface roughness and the state of crystals were observed using a microscope. The results are shown in FIGS. 1 and 2. The thread guide B has a rough surface as shown in Figure 1A, but the thread guide F has an extremely fine surface that satisfies the condition that the center line average roughness is 0.2μ or less as shown in Figure 1B. It has a surface. Also, the second
As shown in FIG. 2A, the average crystal grain size of yarn guide B is extremely large compared to the value of 10 μ or less of yarn guide F shown in FIG. 2B. Effects of the Invention The method of the present invention guides false twisted yarn using a yarn guide made of polycrystalline ceramics, whose surface has a center line average roughness of 0.2μ or less and an average crystal grain size of 10μ or less. As shown in the examples, there are very few inconveniences such as generation of fuzz on the yarn and deterioration of yarn quality, or damage to the yarn and accumulation of yarn powder on the thread interface surface of the yarn guide.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図イ,ロは、それぞれ従来およびこの発明
で使用する糸ガイドの表面の粗さの状態を示す顕
微鏡写真、第2図イ,ロは、それぞれ従来および
この発明で使用する糸ガイドの表面の結晶の状態
を示す顕微鏡写真である。
Figures 1A and 2B are micrographs showing the surface roughness of the thread guides used conventionally and in this invention, respectively. 2 is a microscopic photograph showing the state of crystals.

Claims (1)

【特許請求の範囲】[Claims] 1 多結晶セラミツクスからなり、かつ表面の中
心線平均粗さが0.2μ以下であり、平均結晶粒径
が10μ以下である糸ガイドを使用して仮撚糸を案
内することを特徴とする仮撚糸の案内方法。
1. A false-twisted yarn characterized in that the false-twisted yarn is guided using a yarn guide made of polycrystalline ceramics, whose surface has a center line average roughness of 0.2μ or less and an average crystal grain size of 10μ or less. Guidance method.
JP12785279A 1979-10-05 1979-10-05 Guide for false twisting yarn Granted JPS5653222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12785279A JPS5653222A (en) 1979-10-05 1979-10-05 Guide for false twisting yarn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12785279A JPS5653222A (en) 1979-10-05 1979-10-05 Guide for false twisting yarn

Publications (2)

Publication Number Publication Date
JPS5653222A JPS5653222A (en) 1981-05-12
JPS628527B2 true JPS628527B2 (en) 1987-02-23

Family

ID=14970253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12785279A Granted JPS5653222A (en) 1979-10-05 1979-10-05 Guide for false twisting yarn

Country Status (1)

Country Link
JP (1) JPS5653222A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5327389A (en) * 1976-08-27 1978-03-14 Hitachi Ltd Driving circuit of liquid crystal number display device
JPS5364709U (en) * 1976-10-27 1978-05-31
JPS5554646Y2 (en) * 1977-07-04 1980-12-17

Also Published As

Publication number Publication date
JPS5653222A (en) 1981-05-12

Similar Documents

Publication Publication Date Title
CN202809036U (en) Fiber guiding device
JP4723055B2 (en) Alumina sintered body, manufacturing method thereof, sintered alumina member and arc tube
AU2014211053B2 (en) Fishing-line guide member, and fishing-line guide and fishing rod provided with said fishing-line guide member
US4292049A (en) Ceramic materials for high-speed cutting
JPS628527B2 (en)
Sowman et al. Ceramic oxide fibers
EP4455110A1 (en) Ceramic matrix composite material and method for manufacturing same
Powell‐Doğan et al. Residual‐stress‐induced grain pullout in a 96% alumina
JP3329622B2 (en) Friction disc
JPH08267305A (en) Composite ceramics tool, coated composite ceramics tool, and methods for producing the same
JP3152774B2 (en) Alumina ceramics for sliding members
JPH10262510A (en) Fishing line guide member and method of manufacturing the same
JP3502738B2 (en) Fiber guide
JP2001158658A (en) Fiber guide member
JPH09256232A (en) False-twisting disk
JPH01321262A (en) Thread guide
JP3488748B2 (en) Fiber guide and manufacturing method thereof
JPH036106B2 (en)
JP2650049B2 (en) Ceramic cutting tool and its manufacturing method
JP3563460B2 (en) Fiber guide and manufacturing method thereof
JP4883887B2 (en) Hollow body shaped decorative zirconia sintered body
JP2539631Y2 (en) False twist disc
JP2761746B2 (en) Thread road
JPS60186462A (en) Thermal impact-resistant refractories
JPH07125923A (en) Thread