1. A packaging article, comprising a peel seal film comprising a substantially biodegradable substrate and a coating comprising at least one copolymer of lactic acid and caprolactone, the peel seal film being sealed to itself andor to a secondary substrate in a peelable manner to enclose a packaged product, wherein the coating of the peel seal film additionally comprises nitrocellulose.
2. The packaging article according to claim 1, wherein nitrocellulose is present in an amount of less than 40% ww of the dry weight of the coating composition.
3. A packaging article according to claim 1, wherein the secondary substrate comprises part of the packaging article formed from PLA or from a composition comprising PLA.
4. A packaging article according to claim 1, wherein the packaging article is a container having at least one opening, and the peel seal film is sealed over said opening to close the container in an openable manner.
5. A packaging article according to claim 4, wherein the container is a rigid tray.
6. A packaging article according to claim 1, wherein the coating of the peel seal film comprises at least one wax.
7. A packaging article according to claim 6, wherein the wax is present in an amount of less than 10% the dry weight of the coating composition.
8. A packaging article according to claim 1, wherein the coating of the peel seal film comprises an antiblock additive.
9. A packaging article according to claim 8, wherein the antiblock additive is present in an amount of less than about 5% ww of the dry weight of the coating composition.
10. The packaging article according to claim 1, wherein the at least one copolymer has a Tg in the range of from about \u221210\xb0 C. to about 50\xb0 C.
11. The packaging article according to claim 1, wherein the at least one copolymer has a molecular weight in the range of from about 20,000 to about 50,000.
12. The packaging article according to claim 1, wherein the at least one copolymer has a hydroxyl group value in the range of from about 2 KOH mgg to about 15 KOH mgg.
13. The packaging article according to claim 1, wherein the peel seal film is transparent with wide angle haze of less than about 10%.
14. A packaging article, comprising a peel seal film comprising a substantially biodegradable substrate and a coating comprising at least one copolymer of lactic acid and caprolactone, the peel seal film being sealed to itself andor to a secondary substrate in a peelable manner to enclose a packaged product, wherein the coating of the peel seal film comprises a styrenic copolymer.
15. The packaging article according to claim 14, wherein the styrenic copolymer is present in an amount of less than about 3% ww of the dry weight of the coating composition.
16. The packaging article according to claim 14, wherein the at least one copolymer has a Tg in the range of from about \u221210\xb0 C. to about 50\xb0 C.
17. The packaging article according to claim 14, wherein the at least one copolymer has a molecular weight in the range of from about 20,000 to about 50,000.
18. The packaging article according to claim 14, wherein the at least one copolymer has a hydroxyl group value in the range of from about 2 KOH mgg to about 15 KOH mgg.
19. The packaging article according to claim 14, wherein the peel seal film is transparent with wide angle haze of less than about 10%.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
We claim:
1. A method for detecting the open condition of a displaceable gate of a crib and detecting the sounds of an infant in the crib, said method comprising the steps of:
coupling a first member comprising a transmitter and a microphone to the crib, said transmitter transmitting a wireless signal to a remote device representative of the sounds of the infant in the crib and said remote device providing an audible version of the sounds of the infant;
coupling a second member to the displaceable gate;
said first member and said second member interacting with each other to modify said wireless signal to include a component representative of the open gate condition whenever the crib gate is opened; and
providing an indication at said remote device whenever said component is present in said wireless signal.
2. A method for detecting the movement of a displaceable gate of a crib, said method comprising the steps of:
(a) coupling a first member to the crib;
(b) coupling a second member to the displaceable gate;
(c) said first and second members interfacing to detect the presence of the other without using wires exposed to the crib.
3. A gate sensor for use with a baby crib having a displaceable gate that can be moved into an open or a closed position, said gate sensor detecting the open condition of the displaceable gate, said gate sensor comprising:
a first portion containing an emitterdetector coupled to the crib for emitting a first signal and detecting a second signal;
a second portion coupled to the displaceable gate, said second portion receiving said first signal and reflecting said second signal towards said first portion when the displaceable gate is closed;
said first and second portions having no electrical conductors exposed to the baby crib.
4. A gate sensor for use with a baby crib having a displaceable gate that can be moved into an open or a closed position, said gate sensor detecting the open condition of the displaceable gate, said gate sensor comprising:
a first portion containing an emitter coupled to the crib for emitting a first signal;
a second portion coupled to the displaceable gate, said second portion comprising a detector for detecting said said first signal;
said first and second portions having no electrical conductors exposed to the baby crib.
5. A gate sensor for use with a baby crib having a displaceable gate that can be moved into an open or a closed position, said gate sensor detecting the open condition of the displaceable gate, said gate sensor comprising:
a first portion containing an emitterdetector coupled to the displaceable gate for emitting a first signal and detecting a second signal;
a second portion coupled to the crib, said second portion receiving said first signal and reflecting said second signal towards said first portion when the displaceable gate is closed;
said first and second portions having no electrical conductors exposed to the baby crib.
6. A gate sensor for use with a baby crib having a displaceable gate that can be moved into an open or a closed position, said gate sensor detecting the open condition of the displaceable gate, said gate sensor comprising:
a first portion containing an emitter coupled to the displaceable gate for emitting a first signal;
a second portion coupled to the crib, said second portion comprising a detector for detecting said said first signal;
said first and second portions having no electrical conductors exposed to the baby crib.