Samvinna
LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
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.
Lengra kominn
Unknown
Leiðbeiningar
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.
Efni fyrir þetta skref:
Prjónað bómullarefni1 linerNauðsynleg verkfæri:
Skæri
Saumavél
Óþekkt mál2
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.
Efni fyrir þetta skref:
Ediksýra (ísedik)1 10 % in acetone
Asetón1 solventNauðsynleg verkfæri:
Hanskamót
Própanbrennari3
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.
Efni fyrir þetta skref:
Náttúrulegt gúmmílatex1 bath
Slípandi hreinsiefni1 as neededNauðsynleg verkfæri:
Hanskamót
Skrúbbur4
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.
Efni fyrir þetta skref:
Bútýlgúmmílatex100 parts dry
Brennisteinn3 parts
Sinkdíbútýldíþíókarbamat4 parts
Sinkoxíðduft5 parts
Formaldehýðlausn (37 % formalín)0.1 parts formaldehyde
Fljótandi díþíókarbamathvati4 parts
Óþekktur efniviður6.5 parts pigmentNauðsynleg verkfæri:
Hrærari5
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.
Nauðsynleg verkfæri:
Hanskamót
Þurrkofn6
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.
Efni fyrir þetta skref:
Sápa1 as neededNauðsynleg verkfæri:
Gufusæfir á borðSkæriEfni
13- 1 linerStaðgengill
- 1 10 % in acetoneStaðgengill
- 1 solventStaðgengill
- 1 bathStaðgengill
- 1 as neededStaðgengill
- 100 parts dryStaðgengill
- 3 partsStaðgengill
- 4 partsStaðgengill
- 5 partsStaðgengill
- 0.1 parts formaldehydeStaðgengill
- 4 partsStaðgengill
- 6.5 parts pigmentStaðgengill
- 1 as neededStaðgengill
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