Material Suggestion“PLA(Polyactic Acid)”Fibers Proposal

MIYAMACO.,LTD
1-10, Ikutamatera-machi,
Tennnoji-ku,Osaka, JapanPLA (polylactic acid) Fiber

What is PLA (Polylactic Acid) Fiber?
It is plant based polylactic acid fiber , and its main features are below:

1

2

Heat-resistant, Dyeable

Biodegradable

3

4

Deodorization, Antibacterial

Slightly Acidic

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PLA (polylactic acid) Fiber

Development Chronology

1.

The conventional PLA is used to be mixed with the petroleum-derived one,but special additives, modifiers and our know-how made it possible todevelop high quality 100% plant based products.

2.

It is expected to be used as a substitute for polyester that is one of the causeof the environmental issues today.

Discharged clothes that floats with plastic wastes, causing the serious environmental problems.
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PLA (polylactic acid) Fiber

Biodegradability
Principle①Hydrolysis (ph8, humidity : 80％, temperature :80℃)②Be digested by bacteria; Be decomposed into water and carbon dioxide

Environment①Compost (Garbage disposal machine)②Natural environment (Soil : 〇 Water : × Sea : △)③It is NOT decomposed in living environment.

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PLA (polylactic acid) Fiber

Difference from other companies’ PLAADVANTAGE

Increased crystallinity while remaining softnessHeat① resistance

Glass-transition temperature and melting point havebeen improved (Filament:130℃ Staple:125℃）② dyeability

High dyeing stability due to the well-organized molecules※Disadvantage : Biodegradability is worse than unmodified PLA

Excellent heat resistance and dyeability
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PLA (polylactic acid) Fiber①Color Fastness
PLA 100％ Color Fastness
Washing Fastness

Discoloration : grade 4-5

Staining : grade 4-5

Rubbing Fastness

Dry friction : grade 4-5

Wet friction : grade 4-5

Sweat Fastness (Acid)

Discoloration : grade 5

Staining : grade 4

Sweat Fastness (Alkali)

Discoloration : grade 5

Staining : grade 4

Color Fastness to Water

Discoloration : grade 5

Staining : grade 4

Light Fastness

Irradiation : grade 3

Above the : grade 3

No difference from polyester except for light fastness
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PLA (polylactic acid) Fiber②PLA Short Fiber Antibacterial Test
Results：
生菌数の常用対数値(最大最小値)
No.

SAMPLE①30/1 PLA70/C30 BLACK②30/1 C70/PLA30 BLACK

抗菌活性値
接種直後

18時間培養後Original

3.97(0.3)

1.30(0.0)

5.7

Washed 10 times

3.81(0.1)

2.38(1.3)

4.6

Original

3.93(0.3)

2.77(0.4)

4.2

Washed 10 times

4.26(0.1)

2.49(0.2)

4.5

4.54(0.1)

6.99(0.0)

Propagation late
Ｆ：2.4

Control test・[standard cloth ( C100%、white cloth)]※Using the test bacterial suspension that is added surfactant interfacial active agent (Tween80)
Test Procedure : JIS L1902:2015 Bacterium liquid-absorbing method
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③Deodorant Test
Results：Instrumental analysis

Detector tube method : Ammonia, Acetic acidGas chromatography : Isovaleric acid

Decrement(%)
Ammonia①C70 PLA30（BLACK）②C70 PLA30（Raw white）

Acetic acid Isovaleric acid

Original

88

91

98

Washed 10times

89

96

99

Original

90

86

98

Washed 10times

80

91

99

Test Procedure：Japan Textile Evaluation Technology Council Corporation
Instrumental analysis manual (Detector tube method, Gas chromatography)
Initial gas concentration… Ammonia 100ppm, Acetic Acid 30ppm, Isovaleric Acid about 88ppm
Measurement time…

2 hours later

Sample size…

Detector tube method 100㎠、Gas chromatography 50㎠
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PLA (polylactic acid) Fiber

Ph Test（PLA Polylactic Acid Fiber）
The results described in this report arefor the test sample and do not prove
the quality of the entire lot.
Test Items

染色堅牢度

生地品質検査報告書
Test Method/Material No.

1

Light-resistant

JIS L 0842

Change in color

Laundry fastness(Grade)JIS L 0844
(A-2)

Change in color

Sweat fastness(Grade)JIS L 0848
AAcidAlkali

Rubbing fastness(Grade)JIS L 0849
(Ⅱ)

Dry cleaning(Grade)JIS L 0850

Bleeding(Grade)

Daimaru Method

Ph of ext.

23456

78

Staining
Change in color
Staining
Change in color
Staining
DryWetChange in color

JIS L 1096 A

Staining

Ph5.6＝Slightly Acidic

Staining

5.6

Gentle on the skin,
Low stimulation

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Main Application Examples of PLA Materials

Knit products e.g. sweater, socks

Face mask (slightly acidic)

Fabric e.g. suits, shirts

General merchandise e.g. tableware, trashbag, raincoat

Can Be Used in Various Products as an
Eco-friendly Material Instead of polyester
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Main Target
1.For all apparel products
・Can be used for all apparel products such as
cut-and-sew, fabric, and knitted articles.
・Exporting companies

2.For baby products
Natural materials + antimicrobial and deodorantCut-and-sew, mittens, socks and bibs etc.

3.Enterprise interested in SDG’s
Uniforms, material related
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PLA (polylactic acid) Fiber

Finally

PLA products are on sale at the website below
https://www.miyama-tex.shop/shopbrand/ct10/

Thank you！

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