JP2002069796A - Woven or knit fabric of polylactic acid - Google Patents

Woven or knit fabric of polylactic acid

Info

Publication number
JP2002069796A
JP2002069796A JP2000268720A JP2000268720A JP2002069796A JP 2002069796 A JP2002069796 A JP 2002069796A JP 2000268720 A JP2000268720 A JP 2000268720A JP 2000268720 A JP2000268720 A JP 2000268720A JP 2002069796 A JP2002069796 A JP 2002069796A
Authority
JP
Japan
Prior art keywords
fiber
polylactic acid
acid
woven
based
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.)
Pending
Application number
JP2000268720A
Other languages
Japanese (ja)
Inventor
Isamu Okamoto
勇 岡本
Original Assignee
Unitika Textiles Ltd
ユニチカテキスタイル株式会社
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 Unitika Textiles Ltd, ユニチカテキスタイル株式会社 filed Critical Unitika Textiles Ltd
Priority to JP2000268720A priority Critical patent/JP2002069796A/en
Publication of JP2002069796A publication Critical patent/JP2002069796A/en
Application status is Pending legal-status Critical

Links

Abstract

PROBLEM TO BE SOLVED: To provide a woven or knit fabric causing little lowering of the productivity by the end breakage in spinning step, having characteristic feeling of wool fiber and decomposable by landfill after use. SOLUTION: The woven or knit fabric is produced by using a spun yarn composed of (A) a polylactic acid fiber and (B) wool fiber and blending the fibers at an A/B weight ratio of 60/40<=A/B<=80/20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven or knitted fabric comprising polylactic acid-based fibers having excellent biodegradability.

[0002]

2. Description of the Related Art Conventionally, as a woven or knitted fabric using a mixture of a polyester fiber and a wool fiber, a staple fiber blended woven or knitted fabric using a blended yarn of a polyester staple fiber and a wool fiber, and a crimping process by false twisting. A cross-woven fabric using the applied polyester fiber yarn as a warp or a weft, and using a wool fiber yarn, a mixed spin of wool fiber and polyester short fiber, or a mixed twist yarn of polyester long fiber yarn as the other yarn. There is.
However, these woven fabrics have the problem of losing the original texture of wool fibers and giving a paper-like texture, although the characteristics of the polyester fibers in terms of physical properties can be obtained. In addition, there is a woven or knitted fabric using a blended yarn with a low-strength polyester short fiber to obtain the texture of wool fiber,
When a polyester fiber having low strength is used, yarn breakage in the spinning process, particularly in the spinning process, increases, and also in the weaving and knitting process, the yarn breakage increases, and there is a problem in productivity and quality.

Furthermore, conventional woven or knitted fabrics made of polyester fibers do not decompose in ordinary disposal, remain semipermanently in their shape, and generate a large amount of heat of combustion when incinerated. Damage to the furnace or NO in waste gas
The effect on the environment, such as increasing the amounts of x and SOx, is also a problem.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and there is little decrease in productivity due to yarn breakage in a spinning process, which has the original texture of wool fiber, and which is discarded. Sometimes it decomposes in a relatively short period of time in soil, activated sludge, compost, or emits no harmful gas when incinerated, and emits NOx and SOx that are harmful due to the low combustion heat of cellulose. It is an object of the present invention to provide an environment-friendly woven or knitted fabric capable of minimizing the generation amount.

[0005]

According to the present invention, a polylactic acid-based fiber (A) and a wool fiber (B) are used in a mixed mass ratio (A / B).
A polylactic acid-based woven or knitted fabric characterized by comprising a blended yarn blended at 60/40 ≦ A / B ≦ 80/20.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The polylactic acid-based polymer constituting the polylactic acid-based fiber used in the present invention is a thermoplastic aliphatic polyester, which is a polymer having poly (α-hydroxy acid) as a main repeating unit. No. Specifically, poly (D-lactic acid), poly (L-lactic acid), a copolymer of D-lactic acid and L-lactic acid, a copolymer of D-lactic acid and hydroxycarboxylic acid, and a copolymer of L-lactic acid and hydroxycarboxylic acid Copolymers with carboxylic acid, copolymers of D-lactic acid, L-lactic acid and hydroxycarboxylic acid, and the like, among which polymers having a melting point of 8
It is preferable to use a polymer having a temperature of 0 ° C. or higher.

Here, the hydroxycarboxylic acid in the case of a copolymer of lactic acid and hydroxycarboxylic acid includes glycolic acid, hydroxybutyric acid, hydroxyvaleric acid, hydroxycaproic acid, hydroxyheptanoic acid, hydroxycaprylic acid and the like. Can be

[0008] Such a polylactic acid-based polymer has a number average molecular weight of about 20,000 or more, preferably 40,000 or more, in view of the spinning properties and the obtained yarn properties. As for the upper limit of the number average molecular weight, any material capable of melt spinning may be used, and may be about 150,000.

The cross-sectional shape of the polylactic acid-based fiber may be any shape such as an elliptical shape, a rhombic shape, a triangular shape, a triangular shape, a quadrangular shape, a polygonal shape, a T-shaped shape, and a well-shaped shape, in addition to a normal round shape. Can be selected as appropriate. Further, it may have a hollow cross-sectional shape having a hollow portion.

The polylactic acid-based fiber may be of a single-phase form composed of one kind of polylactic acid-based polymer alone or of a composite form composed of two or more kinds of polylactic acid-based polymers. Examples of the composite form include a parallel type, a multilayer type, a core-in-sheath type, a split type, and a multi-leaf type.

The degree of crystallinity of the polylactic acid fiber is 10 to 40.
%. By setting the crystallinity of the fiber within the above range, the heat shrinkage of the fiber is suppressed to be low, and the fiber has practical mechanical strength. Crystallinity in the above range, by performing a heat treatment or stretching, and, for the polylactic acid-based polymer, for example, talc, boron nitride, calcium carbonate, magnesium carbonate, a crystal nucleating agent such as titanium oxide This is achieved by adding. The addition of a crystal nucleating agent promotes fiber crystallization, improves the mechanical strength and heat resistance of the obtained mixed yarn, and furthermore, between the spun yarns in the melt spinning and cooling steps during production. This is preferable because fusion (blocking) can be prevented. It is desirable that the amount of such a crystal nucleating agent be in the range of 0.1 to 3.0% by mass, more preferably 0.2 to 2.0% by mass.

The fineness of the single fiber of the polylactic acid-based fiber may be appropriately selected, but it is preferable to use a polylactic acid-based fiber of 1 to 10 dtex. After spinning the polylactic acid-based fiber,
The fiber may be cut and the fiber length may be appropriately selected, but is preferably 38 to 76 mm.

The wool fiber used in the present invention is not limited in fiber length or fineness, but has a fiber length of 40 to 110 mm and a fineness of
Those with 4 to 10 dtex are suitable.

In the present invention, a spun yarn obtained by blending the above-mentioned polylactic acid-based fiber and wool fiber is used. Here, the mixed mass ratio of polylactic acid-based fiber (A) and wool fiber (B) (A /
B) must be such that 60/40 ≦ A / B ≦ 80/20. The mixed mass ratio of polylactic acid fiber is 60-80%
And preferably 65 to 70%. If the mixed mass ratio of the polylactic acid-based fiber is less than 60%, the strength as a product cannot be maintained, and if it exceeds 80%, the texture of the wool fiber is lost, and the value as a product decreases.

The method of spinning a spun yarn used in the present invention may be a commonly used method, for example, a spinning method using a ring spinning method or the like in a blended cotton blend. The number of twists to be twisted may be in the range of the number of twists to be twisted by ordinary spinning in which spinning is not disturbed, and a twist coefficient K represented by the following equation:
Is preferably 3.0 to 4.2. K = T / Ne 1/2 (However, K = number of twists / 2.54 cm, Ne: cotton count)

In the present invention, a woven or knitted fabric is formed by using a blended yarn in which a polylactic acid-based fiber and a wool fiber are blended. The woven or knitted fabric may be formed using a generally used method, and is not particularly limited in the present invention.

[0017]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. In the Examples, each physical property value was determined as follows. The measurement and evaluation of the woven or knitted fabric in the examples were performed by the following methods.

Melting point (° C.) The temperature at which the extreme value of the melting endothermic curve obtained by using a differential scanning calorimeter DSC-7 manufactured by PerkinElmer at a heating rate of 20 ° C./min is defined as the melting point. did. Melt flow rate (hereinafter referred to as MFR) (g /
10 minutes) 210 according to the method described in ASTM 1238D.
The melt discharge amount at a temperature of 2 ° C. and a load of 2160 g was measured.

Anti-pilling property JIS L-1076 ICI (Method A) 5 hr Tensile strength JIS L-1096 Strip method A Tear strength JIS L-1018,1096 Pendulum method Abrasion strength JIS L-1096 Martindale Method Hand The sensory test was performed by the touch of 10 panelists, and the relative evaluation was made in the following three stages. Good: 、, normal: Δ, poor: × Degradability Degradability when buried in soil was evaluated on the following two levels. Good: Good, Bad: Bad

Example 1 Optical purity: 98.8%, melting point: 170 ° C., MFR: 25 g
/ 10 minutes of poly-L-lactic acid resin was melted and the spinning temperature was 220
Under a condition of 0 ° C. and a discharge rate of a single hole of 0.31 g / min, the yarn was melt-proofed from a spinneret. Next, the spun yarn is cooled by a cooling device, and a spinning oil agent (an oil agent containing 20% by mass of polyethylene glycol monooleate having a molecular weight of 600) is applied by 0.6% by mass, and a take-up speed of 800 m / min. Rolled up. Next, the obtained undrawn yarn is combined into a tow by drawing so that the drawn tow fineness becomes 330,000 dtex, and using a known drawing machine having a different peripheral speed, a drawing temperature of 120 ° C. and a draw ratio of 2.51 times. After crimping with a crimper and adding 0.3% by mass of an oil containing 20% by mass of polyethylene glycol monooleate having a molecular weight of 600, the tow is dried, and subsequently dried to a thickness of 64 mm. To obtain 1.7 dtex polylactic acid-based short fibers.

The average fineness of the wool fiber is 5.5 dte.
x, Merino wool having an average fiber length of 64 mm was prepared.

Using this polylactic acid-based short fiber and wool fiber,
After mixing and weighing so that the blending mass ratio becomes 70:30, the mixture is passed through a blending cotton machine, and then continuously passed through a flat card machine.
The web was bundled to obtain a sliver. Eight slivers of this sliver are passed through the first drawing machine, and the obtained slivers are further doubled and passed through the finishing drawing machine. Then, the sliver is passed through a roving machine to obtain a roving. Was.
The obtained roving is spun with a ring spinning machine, and the number of twists is 1
9.6 turns / 2.54 cm (twist coefficient: 3.3) to give a spun yarn of 60th count (meter count).

The spun yarn is used as a twin yarn, which is used as a warp and a weft to obtain a warp density of 60 / 2.54c.
m, a plain woven fabric having a weft density of 55 / 2.54 cm was obtained. The obtained plain woven fabric was subjected to a desizing / scouring process, a relaxing process, a pre-setting process, a calcining process, a dyeing process, and a finishing process through a finishing setting process to obtain a polylactic acid-based fabric of the present invention.

Comparative Example 1 A comparative fabric was obtained in exactly the same manner as in Example 1, except that the polylactic acid-based short fiber was replaced with a polyester fiber composed of polyethylene terephthalate.

Comparative Example 2 A comparative fabric was obtained in the same manner as in Example 1, except that the polylactic acid-based short fibers were replaced with sulfoisophthalate copolymerized polyester fibers.

Comparative Example 3 Using exactly the same polylactic acid-based staple fiber and wool fiber as in Example 1, the blended mass ratio of polylactic acid-based staple fiber and wool fiber was 5
A woven fabric for comparison was obtained in exactly the same manner as in Example 1 except that the blending was performed at 0:50.

Comparative Example 4 Using exactly the same polylactic acid-based staple fiber and wool fiber as in Example 1, the mixed mass ratio of the polylactic acid-based staple fiber and the wool fiber was 9
A woven fabric for comparison was obtained in exactly the same manner as in Example 1, except that the blending was performed at 0:10. The performance of the present invention and the comparative woven fabric were evaluated, and the results are shown in Table 1.

[0028]

[Table 1]

As is clear from Table 1, Example 1 had strong strength, excellent anti-pilling properties, and good texture. On the other hand, Comparative Example 1 blended with ordinary polyester fiber
Is poor in paper-like texture, and Comparative Example 2 blended with a low-strength polyester fiber and Comparative Example 3 blended with a low polylactic acid-based fiber have a low strength and a high blended rate of polylactic acid-based fiber. In Example 4, the texture was poor.

[0030]

According to the present invention, a woven or knitted fabric using a spun yarn in which a polylactic acid-based fiber and a wool fiber are blended has a strong strength, a texture unique to a wool fiber, and a disposal treatment after use. Also, it is possible to provide an extremely eco-friendly woven or knitted fabric that is decomposed by landfilling.

Claims (2)

[Claims]
1. Polylactic acid-based fiber (A) and wool fiber (B)
And mixed mass ratio (A / B) 60/40 ≦ A / B ≦ 80
A polylactic acid-based woven or knitted fabric comprising a blended yarn blended at / 20.
2. The constituent polymer of the polylactic acid-based fiber is poly (D-lactic acid), poly (L-lactic acid), a copolymer of D-lactic acid and L-lactic acid, and a copolymer of D-lactic acid and hydroxycarboxylic acid. , A copolymer of L-lactic acid and hydroxycarboxylic acid, a copolymer of D-lactic acid, L-lactic acid and hydroxycarboxylic acid, or a blend thereof. The polylactic acid-based woven or knitted fabric according to claim 1, characterized in that:
JP2000268720A 2000-09-05 2000-09-05 Woven or knit fabric of polylactic acid Pending JP2002069796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000268720A JP2002069796A (en) 2000-09-05 2000-09-05 Woven or knit fabric of polylactic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000268720A JP2002069796A (en) 2000-09-05 2000-09-05 Woven or knit fabric of polylactic acid

Publications (1)

Publication Number Publication Date
JP2002069796A true JP2002069796A (en) 2002-03-08

Family

ID=18755455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000268720A Pending JP2002069796A (en) 2000-09-05 2000-09-05 Woven or knit fabric of polylactic acid

Country Status (1)

Country Link
JP (1) JP2002069796A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008274468A (en) * 2007-04-27 2008-11-13 Toray Ind Inc Spun yarn
CN102167895A (en) * 2011-05-19 2011-08-31 江南大学 Method for preparing waste wool/polylactic acid ecological composite material
CN102443923A (en) * 2011-09-30 2012-05-09 常熟市众望经纬编织造有限公司 Polylactic acid and tencel interwoven fabric
CN103938350A (en) * 2014-03-24 2014-07-23 江阴芗菲服饰有限公司 Yakwool/corn fiber blending knitted fabric

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04174729A (en) * 1990-11-02 1992-06-22 Toyobo Co Ltd Yarn for cloth
JPH0693562A (en) * 1992-04-17 1994-04-05 Toray Ind Inc Polyester/wool blended fabric and its production
JP2752319B2 (en) * 1994-03-08 1998-05-18 鐘紡株式会社 Wool / rayon blend fabric
JPH11293518A (en) * 1998-04-14 1999-10-26 Unitika Ltd Biodegradable staple fiber and its production
JP2000080531A (en) * 1998-06-25 2000-03-21 Kanebo Ltd Blended yarn containing polylactic acid fiber

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04174729A (en) * 1990-11-02 1992-06-22 Toyobo Co Ltd Yarn for cloth
JPH0693562A (en) * 1992-04-17 1994-04-05 Toray Ind Inc Polyester/wool blended fabric and its production
JP2752319B2 (en) * 1994-03-08 1998-05-18 鐘紡株式会社 Wool / rayon blend fabric
JPH11293518A (en) * 1998-04-14 1999-10-26 Unitika Ltd Biodegradable staple fiber and its production
JP2000080531A (en) * 1998-06-25 2000-03-21 Kanebo Ltd Blended yarn containing polylactic acid fiber

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008274468A (en) * 2007-04-27 2008-11-13 Toray Ind Inc Spun yarn
CN102167895A (en) * 2011-05-19 2011-08-31 江南大学 Method for preparing waste wool/polylactic acid ecological composite material
CN102443923A (en) * 2011-09-30 2012-05-09 常熟市众望经纬编织造有限公司 Polylactic acid and tencel interwoven fabric
CN103938350A (en) * 2014-03-24 2014-07-23 江阴芗菲服饰有限公司 Yakwool/corn fiber blending knitted fabric

Similar Documents

Publication Publication Date Title
JP5484383B2 (en) Method for producing poly (trimethylene terephthalate) staple fiber, and poly (trimethylene terephthalate) staple fiber, yarn and fabric
JP4093595B2 (en) Method, product and use of degradable polymer fibers
KR100582567B1 (en) Long staple nonwoven fabric
JP3255906B2 (en) Polyester fiber excellent in processability and method for producing the same
US8276405B2 (en) Knitted fabric and sports clothing
DE69731290T2 (en) Spontaneable fibers
JP3801562B2 (en) Spun yarn
EP1516079B1 (en) Polyester staple fiber and nonwoven fabric comprising same
KR100901325B1 (en) Polylatic acid fiber
US6803000B2 (en) Process of making yarn from two types of polyester
KR100905636B1 (en) PolyTrimethylene Terephthalate Tetrachannel Cross-Section Staple Fiber
US7036299B2 (en) Stretch polyster/cotton spun yarn
JP6507156B2 (en) Method of producing fiber, and fiber and yarn produced from the fiber
JP3893995B2 (en) Resin composition and molded body
JP3925176B2 (en) Polyester resin composition
JP4434544B2 (en) Method for producing fine spinning twisted yarn
JP4498001B2 (en) Polyester composite fiber
EP1956120A1 (en) Spun-dyed, crimped polylactic acid fiber, method for manufacture thereof, and carpet
CA2511114A1 (en) Staple fibers and processes for making same
EP1266990A1 (en) Weft knitted fabric
TW200306365A (en) Stretchable core in sheath type composite yarn and stretchable woven or knitted fabric
JP3966043B2 (en) Production method of polylactic acid fiber excellent in heat resistance
TWI314961B (en) Fabric having worsted yarn fabric-like hand and appearance and process for producing same
EP1549789B1 (en) Stretch polyester and acrylic spun yarn
JP2003342836A (en) Heat-bonding fiber and fiber product comprising the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070903

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20091102

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20091106

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091215

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100205

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100302

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20100629