कला
सुन्दरता र कल्याण
हस्तकला
संस्कृति र इतिहास
मनोरञ्जन
वातावरण
खाना र पेय
रिभर्स इन्जिनियरिङ
विज्ञान
खेलकुद
प्रविधि
पहिर्न मिल्ने
Neoprene
Natural rubber swells and softens in oil and cracks in sunlight. In April 1930 Arnold Collins, working in Wallace Carothers' group at DuPont, isolated chloroprene - a close relative of the isoprene in natural rubber, with one chlorine atom in place of a methyl group - and found that it polymerised by itself into a rubber-like solid. DuPont sold it from 1931 as DuPrene and renamed it neoprene in 1937. It was one of the first commercially successful synthetic rubbers, and its selling point was exactly what natural rubber lacked: resistance to oil, weather and heat.
**No patent number is cited here**: the chemistry is well documented and dated, but no single patent was verified as covering neoprene itself, so none is claimed.
**You make a snug neoprene sleeve with a glued-and-stitched butt seam, then test the claim** - a strip of neoprene and a natural rubber band in mineral oil for a day, measured before and after.
शुरुआती
2 hours plus 24 h soak
निर्देशनहरू
1
1
Size the sleeve
Size the sleeve
Measure the bottle diameter. Run the notebook's sizing cell for the cut width and base disc.
चाहिने औजार:
डिजिटल क्यालिपर ६ इन्च
फलामे रुल2
2
Mark the pieces
Mark the pieces
On 3 mm neoprene, chalk a rectangle: cut width x 200 mm tall. Chalk the base disc beside it.
यस चरणका सामग्री:
नियोप्रिन कपडा1 पानाचाहिने औजार:
दर्जीको चकफलामे रुल3
3
Cut
Cut
Cut the rectangle with the rotary cutter against the ruler, one firm pass. Cut the disc with fabric scissors.
चाहिने औजार:
घुम्ने कटर र काट्ने गुन्द्रीको किट
कपडा काट्ने कैँची4
4
Cement the edges
Cement the edges
Brush a thin coat of contact cement on both 3 mm long edges, using the brush in the can lid. Leave until touch-dry, as the can directs.
यस चरणका सामग्री:
सम्पर्क गुँद10 मिलिचाहिने औजार:
रोकघडी5
5
Butt the seam
Butt the seam
Roll into a tube and press the edges face to face, no overlap. Contact cement grabs on touch - align the top first, then close downward. Clip and leave 10 minutes.
चाहिने औजार:
ठूला बाइन्डर क्लिप6
6
Stitch across the seam
Stitch across the seam
Zigzag across the glued seam, stitch width wide enough to bite both sides. Stretch slightly as you sew so the thread gives with the fabric.
यस चरणका सामग्री:
पोलिएस्टर धागो5 मिटरचाहिने औजार:
सिलाइ मेसिन7
7
Close the base
Close the base
Cement the disc rim and the tube's bottom edge, press together, then whip-stitch round by hand.
यस चरणका सामग्री:
सम्पर्क गुँद5 मिलिपोलिएस्टर धागो2 मिटरचाहिने औजार:
हातले सिलाउने सियो8
8
Set up the swell test
Set up the swell test
Cut a 50 x 10 mm neoprene offcut. Cut open a rubber band to a 50 mm strip. Measure both. Submerge in mineral oil in a lidded jar for 24 hours.
यस चरणका सामग्री:
खाद्य श्रेणीको खनिज तेल100 मिलि
रबर ब्यान्ड1 प्याकचाहिने औजार:
सिसाको भाँडोडिजिटल क्यालिपर ६ इन्च9
9
Measure again
Measure again
Blot the strips dry and measure their lengths. Enter all four numbers in the notebook.
चाहिने औजार:
डिजिटल क्यालिपर ६ इन्च10
10
Chlorine, swell and sizing
Chlorine, swell and sizing
Jupyter नोटबुक लोड हुँदैछ…
11
11
History & Context
History & Context
Neoprene grew out of Julius Nieuwland's acetylene chemistry at Notre Dame, which DuPont licensed; Collins' chloroprene came from that work in Carothers' laboratory, the same group that produced nylon.
Its limits are the other side of its strength: it costs more than natural rubber, is less springy, and stiffens in deep cold. The sheet you used is almost certainly closed-cell neoprene FOAM laminated to nylon jersey - the form wetsuits made familiar - where trapped gas cells add insulation that solid neoprene lacks.
सामग्री
5- 1 पानाप्लेसहोल्डर
- सम्पर्क गुँद10% कमिसन15 मिलिप्लेसहोल्डर
- 7 मिटरप्लेसहोल्डर
- 100 मिलिप्लेसहोल्डर
- 1 प्याकप्लेसहोल्डर
आवश्यक उपकरणहरू
10- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
सम्बन्धित ब्लुप्रिन्ट
यी ब्लुप्रिन्टहरूले ज्ञान साझा गर्छन् — प्रविधि, सामग्री वा सिद्धान्त
CC0 सार्वजनिक डोमेन
यो ब्लुप्रिन्ट CC0 अन्तर्गत जारी गरिएको छ। तपाईं अनुमति नसोधी प्रतिलिपि, परिमार्जन, वितरण र प्रयोग गर्न सक्नुहुन्छ।
ब्लुप्रिन्ट मार्फत उत्पादनहरू किनेर सिर्जनाकर्तालाई सहयोग गर्नुहोस् सिर्जनाकर्ता कमिसन विक्रेताले तोकेको, वा यो ब्लुप्रिन्टको नयाँ संस्करण बनाउनुहोस् र आम्दानी बाँड्न आफ्नो ब्लुप्रिन्टमा जडानको रूपमा समावेश गर्नुहोस्।