23rd September 2010: Liquid Latex as Adhesive - experiments No pics - but I did some experiments sticking scraps of latex together.
I read somewhere that liquid latex can be used as an adhesive. Sounds good in thoery. However this is what I discovered..
I used standard milky off white looking liquid latex. I applied it onto the latex scraps and pressed firmly. I left the samples overnight to completely dry. Next day the pieces did appear to be glued together. So I went on to do some stress tests on the bond.
First thing I noticed was the two latex pieces still looked like two distinct seperate pieces that had been glued together - as opposed to a manufactured latex garment seam which looks like the two pieces have fused togehter into one.
Streatching the sample pieces the join held, but not convincingly enough for say a main crotch seam where there will be a lot of stress on a small area. I found that I could pick the corner of the sample and peel the two layers completely apart with alarming ease. Obviously the liquid latex hadn't bonded irreversably to the latex sheet!
Conclusion: Using liquid latex as an adhesive for latex sheet works like a contact adhesive - it bonds to the two surfaces and holds the two piecess togeher, the mechanical streangth of the seam is limited by the strength of the liquid latex gripping onto the latex sheet. Larger surface areas will have more strength. But small surface areas or areas under a lot of stress are prone to fail! Also there is a small 'step' produced at the seam where the two pieces of latex are layered together.
Solvent based adhesive: Seems to work more like a welding process. The adhesive seems to temporarily melt the two latex pieces enough to fuse them together into one as firm pressure is applied. Result - seams made using this adhesive are virtually unbreakable, and.. almost invisible as there is no 'step' because the two pieces fuse into one.