Kerjasama
SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
Chemical-Resistant Gloves: Butyl Latex over Natural Rubber on a Cotton Liner (Hart & Collyer, US 4,190,685, 1980)
Dipped rubber gloves built in layers on a knitted cotton liner: one coat of natural rubber, then five coats of butyl rubber, which lets very little liquid or vapour through. Each coat is dipped from latex on a porcelain hand form, and the whole glove is cured under steam and air pressure. Made in Canada to protect soldiers against chemical warfare agents; worn gloves showed no penetration in 24 hours of field use.
Result: flexible, soft chemical-resistant gloves with a comfortable cotton lining.
Source: J. A. Hart and J. C. Collyer, US 4,190,685 (1980), latex method. Unknown: sizes, the pigments. Picture: the patent drawing.
Lanjutan
Unknown
Arahan
1
1
Sew the cotton liner
Sew the cotton liner
Cut knitted or interlock cotton fabric to a glove shape and sew it into a glove. It stretches both ways, soaks up sweat and makes the glove easy to put on and take off. Not given: sizes, the knit.
Bahan untuk langkah ini:
Kain kait kapas1 linerAlatan diperlukan:
Gunting
Mesin jahit
Dimensi tidak diketahui2
2
Dip in coagulant
Dip in coagulant
Pull the liner onto a porcelain hand form and flame it to smooth off the surface. Dip it in a 10 % solution of acetic acid in acetone, then turn the form for about 2½ minutes at 24 °C until it is dry. The coagulant sets the latex before it can soak through the cloth.
Bahan untuk langkah ini:
Asid asetik (glasier)1 10 % in acetone
Aseton1 solventAlatan diperlukan:
Acuan sarung tangan
Obor Propana3
3
Dip the natural rubber coat
Dip the natural rubber coat
Dip the liner into natural rubber latex (the patent uses LOTOL 1185) and leave it 5 seconds. Draw it out, turn it upside down and let it dry. Scrub the rubber film with an abrasive cleaner, a brush and water, and dry it again.
Bahan untuk langkah ini:
Lateks getah asli1 bath
Pencuci pelelas1 as neededAlatan diperlukan:
Acuan sarung tangan
Berus penyental4
4
Mix the butyl latex bath
Mix the butyl latex bath
Mix, in parts by dry weight: butyl rubber latex 100, sulphur 3, zinc dibutyldithiocarbamate 4, zinc oxide 5, formaldehyde 0.1 as a preservative, a liquid dithiocarbamate curing accelerator 4 (Merac 255 in the patent), and 6.5 of pigments (olive drab in the patent). Not given: the pigments.
Bahan untuk langkah ini:
Lateks getah butil100 parts dry
Sulfur3 parts
Zink dibutilditiokarbamat4 parts
Serbuk Zink Oksida5 parts
Larutan formaldehid (formalin 37 %)0.1 parts formaldehyde
Pemecut ditiokarbamat cecair4 parts
Bahan tidak diketahui6.5 parts pigmentAlatan diperlukan:
Pengacau5
5
Dip five butyl coats
Dip five butyl coats
Dip the glove into the butyl latex and draw it out at 10 cm per minute. At once turn the form at about 8 rpm at 24 °C until the film has gelled, then dry it upside down in an oven at 66 °C for 1 hour. Wash, dip and dry again until there are five butyl coats; do not use the abrasive cleaner on the butyl film.
Alatan diperlukan:
Acuan sarung tangan
Ketuhar pengeringan6
6
Cure and finish
Cure and finish
Dry the glove at 66 °C for 1 hour. Cure it for 3 hours in a pressure vessel with 30 psi steam in the jacket (131 °C) and 26 psi air in the chamber. Strip the gloves from the forms while hot; when cool, trim them and wash them in soapy water.
Bahan untuk langkah ini:
Sabun1 as neededAlatan diperlukan:
Autoklaf mejaGuntingBahan
13- 1 linerPemegang Tempat
- 1 10 % in acetonePemegang Tempat
- 1 solventPemegang Tempat
- 1 bathPemegang Tempat
- 1 as neededPemegang Tempat
- 100 parts dryPemegang Tempat
- 3 partsPemegang Tempat
- 4 partsPemegang Tempat
- 5 partsPemegang Tempat
- 0.1 parts formaldehydePemegang Tempat
- 4 partsPemegang Tempat
- 6.5 parts pigmentPemegang Tempat
- 1 as neededPemegang Tempat
Alatan Diperlukan
9- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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Blueprint ini membuat
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