Thin condom
A condom comprises natural rubber and polyurethane. Preferably, the condom has a single wall thickness of less than 55 μm. More preferably the condom has a single wall thickness of less than 55 μm and a burst pressure of 1.0 kPa or above. A process for making the condom comprises mixing polyurethane and natural rubber latex and forming a condom therefrom.
1. A condom consisting of:
natural rubber latex in an amount of 100 pphr;
a stabilizer in an amount from 0.40 pphr to 0.80 pphr;
a vulcanizing agent in an amount from 0.45 pphr to 0.75 pphr;
a pH adjuster in an amount from 0.05 pphr to 0.10 pphr;
a vulcanizing activator in an amount from 0.40 pphr to 0.75 pphr;
an accelerator in an amount from 0.40 pphr to 0.75 pphr;
an antioxidant in an amount from 0.15 pphr to 0.25 pphr;
a polyurethane latex in an amount from 5 pphr to 20 pphr; and
ammoniated water in an amount from 25 pphr to 33 pphr;
wherein the polyurethane latex comprises an aliphatic polyurethane;
wherein the condom has a single wall thickness of less than 55 um and a burst pressure of 1.0 kPa or above, further wherein the single wall thickness is calculated using the equation:
Single
wall
thickness
=
Weight
Density
×
circumference
×
height
×
10
,
000
wherein single wall thickness=thickness of one condom wall (um), density=density of condom film (g/cm 2 ), circumference=circumference of ring sample (cm), and height=height of ring sample (cm).
2. The condom according to claim 1 , wherein the natural rubber and the aliphatic polyurethane are present as a blend.
3. The condom according to claim 1 , wherein the single wall thickness is less than 50 μm.
4. The condom according to claim 1 , wherein the condom has a burst pressure of 1.2 kPa or above.
5. The condom according to claim 1 , wherein the condom comprises the aliphatic polyurethane in an amount from 5 pphr to 20 pphr (dry weight).
6. The condom according to claim 1 , wherein the aliphatic polyurethane comprises an aliphatic polyester polyurethane.
7. The condom according to claim 6 , wherein the condom comprises the aliphatic polyester polyurethane in an amount from 10 pphr to 20 pphr (dry weight).
8. The condom according to claim 7 , wherein the condom comprises the aliphatic polyester polyurethane in an amount from 12 pphr to 18 pphr (dry weight).
9. The condom according to claim 1 , wherein the aliphatic polyurethane comprises an aliphatic polycarbonate polyurethane.
10. The condom according to claim 9 , wherein the condom comprises the aliphatic polycarbonate polyurethane in an amount from 5 pphr to 10 pphr (dry weight).
11. The condom according to claim 9 , wherein the condom comprises the aliphatic polycarbonate polyurethane in an amount from 5 pphr to 7.5 pphr (dry weight).