1. A non-post treated creped tissue product comprising two or more tissue webs, wherein the basis weight of each web is from about 16.5 to 20 gsm and the product has a strike-through greater than about 2 seconds and an absorbent capacity greater than about 27 grams, wherein the creped tissue product has not been post-treated with an oil, a wax, a silicone.
2. The creped tissue product of claim 1, wherein the geometric mean tensile of each web is less than about 500 g3\u2033.
3. The creped tissue product of claim 1, wherein the geometric mean tensile of the product is less than about 1000 g3\u2033.
4. The creped tissue product of claim 1, wherein the product has a strike-through greater than about 5 seconds.
5. The creped tissue product of claim 1, wherein the product has a strike-through greater than about 2 to about 10 seconds.
6. The creped tissue product of claim 1, wherein the two or more tissue webs comprise a blend of hardwood fibers and softwood fibers, the hardwood fibers comprising at least about 60 percent and the softwood fibers comprising less than about 40 percent of the total weight of the web.
7. The creped tissue product of claim 1, wherein the two or more tissue webs comprise an inner layer and at least one outer layer contiguous with the inner layer.
8. The creped tissue product of claim 7, wherein the two or more tissue webs comprise an inner layer disposed between two outer layers.
9. The creped tissue product of claim 8, wherein the inner layer comprises softwood fibers and the outer layers comprise hardwood fibers.
10. The creped tissue product of claim 9, wherein the geometric mean tensile of the product is from about 600 to about 1000 g3\u2033.
11. A non-post treated multi-ply tissue product comprising two multi-layered creped tissue webs, the tissue webs having three superposed layers, an inner layer consisting essentially of softwood fibers and two outer layers consisting essentially of hardwood fibers, the inner layer being located between the two outer layers, wherein the product has a basis weight from about 33to about 42 gsm, a strike-through from about 5 to about 10 seconds and an absorbent capacity greater than about 27 grams and has not been post-treated with an oil, a wax, a silicone.
12. A non-post treated tissue product comprising at least two wet-pressed creped tissue webs, each web having a first side and a second side and a creping composition comprising a non-fibrous olefin polymer disposed on at least the first side, wherein each tissue web has a basis weight from about 16.5 to 20 gsm and the product has a strike-through greater than about 2 seconds and an absorbent capacity greater than about 27 grams and has not been post-treated with an oil, a wax, or a silicone.
13. The creped tissue web of claim 12, wherein the geometric mean tensile of each web is from about 300 to about 500 g3\u2033′.
14. The creped tissue web of claim 12, wherein the product has a strike-through greater than about 2 to about 10 seconds.
15. The creped tissue web of claim 12, wherein the web comprises a blend of hardwood fibers and softwood fibers, the hardwood fibers comprising at least about 60 percent and the softwood fibers comprising less than about 40 percent of the total weight of the web.
16. The creped tissue web of claim 12, wherein the olefin polymer comprises an alpha-olefin interpolymer of ethylene and at least one comonomer selected from the group consisting of a C4-20 linear, branched or cyclic diene, vinyl acetate, and a compound represented by the formula H2C\u2550CHR, wherein R is a C1-20 linear, branched or cyclic alkyl group or a C6-20 aryl group, or the alpha-olefin polymer comprises a copolymer of propylene with at least one comonomer selected from the group consisting of ethylene, a C4-20 linear, branched or cyclic diene, and a compound represented by the formula H2C\u2550CHR, wherein R is a C1-20 linear, branched or cyclic alkyl group or a C6-20 aryl group.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An RFID interrogator retransmitting a command depending on a collision situation, comprising:
a collision diagnosis unit that analyzes data of a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit that transmits and receives signals to and from one or more tags, the collision diagnosis unit verifies whether a collision occurs in the received signal, and diagnoses a collision type depending on an analysis result of the data of the received signal;
in response to the determination that the collision has occurred, a collision resolution unit retransmits a command depending on the collision situation to the tag through the RF communication unit on the basis of the occurrence of the collision and the collision type that are received from the collision diagnosis unit;
wherein the collision resolution unit includes a situational command retransmission portion that determines whether the command will be retransmitted on the basis of the occurrence of the collision and the collision type, and a random wait time calculation portion that calculates a random wait time for retransmitting the command; and
wherein when the collision type is of at least a first type, the command is retransmitted, and when the collision is of at least a second type, the command is not retransmitted.
2. The RFID interrogator according to claim 1, wherein the collision type diagnosed by the collision diagnosis unit includes a tag on tag collision, a multiple interrogators to interrogator collision, and an interrogator to interrogator collision.
3. The RFID interrogator according to claim 1, wherein the collision resolution unit retransmits the command in the case in which the received collision type is the multiple interrogators to tag collision or the interrogator to interrogator collision.
4. The RFID interrogator according to claim 1, wherein the random wait time calculation portion selects randomly the random wait time between a minimum retransmission wait time determined by a lower threshold of a retransmission wait threshold value and a maximum retransmission wait time determined by an upper threshold of the retransmission wait threshold value.
5. The RFID interrogator according to claim 4, wherein the lower threshold of the retransmission wait threshold value is determined by a time required for a longest expected protocol data unit to be transmitted and the upper threshold of the retransmission wait threshold value is determined by a total expected time required for the interrogator command and the tag response to be transmitted.
6. The RFID interrogator according to claim 3, wherein the collision resolution unit performs an anti-collision without retransmitting the command when determining that the maximum number of transmission times is reached.
7. The RFID interrogator according to claim 1, wherein the collision resolution unit retransmits the command in the case in which a receiver timeout occurs.
8. The RFID interrogator according to claim 5, wherein the longest expected protocol data unit comprises PC, UII, and CRC16.
9. The RFID interrogator according to claim 7, wherein the collision resolution unit retransmits the command only once when the receiver timeout occurs.
10. The RFID interrogator according to claim 7, wherein it is determined that the receiver timeout occurs in the case in which a tag response is not received within a predetermined time after transmitting the command.
11. A control method of an RFID interrogator including a collision diagnosis unit and a collision resolution unit, which retransmits a command depending on a collision situation, comprising:
a collision diagnosis step wherein the collision diagnosis unit analyzes data of a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit, verifying whether a collision occurs in the received signal, and diagnosing a collision type depending on an analysis result of the data of the received signal;
a collision resolution step wherein the collision resolution unit retransmits a command depending on the collision situation to a tag through an RF communication unit on the basis of the occurrence of the collision and the collision type, wherein the collision resolution step includes a situational command retransmission step of determining whether the command is retransmitted on the basis of the occurrence of the collision and the collision type and a random wait time calculation step of calculating a random wait time for retransmitting the command; and
wherein when the collision type is of at least a first type, the command is retransmitted, and when the collision of at least a second type, the command is not retransmitted.
12. The control method of an RFID interrogator according to claim 11, wherein the collision type diagnosed at the collision diagnosis step includes a tag on tag collision, a multiple interrogators to tag collision, and an interrogator to interrogator collision.
13. The control method of an RFID interrogator according to claim 11, wherein at the collision resolution step, the command is retransmitted in the case in which the collision type is the multiple interrogators to tag collision or the interrogator to interrogator collision.
14. The control method of an RFID interrogator according to claim 11, wherein at the random wait time calculation step, the random wait time is selected randomly between a minimum retransmission wait time determined by a lower threshold of a retransmission wait threshold value and a maximum retransmission wait time is determined by upper threshold of the retransmission wait threshold value.
15. The control method of an RFID interrogator according to claim 14, wherein the lower threshold of the retransmission wait threshold value is determined by a time required for a longest expected protocol data unit to be transmitted and the upper threshold of the retransmission wait threshold value is determined by a total expected time required for the interrogator command to be transmitted and the tag response to be received.
16. The control method of an RFID interrogator according to claim 13, wherein at the collision resolution step, an anti-collision step is performed without retransmitting the command when it is determined that the maximum number of retransmission times is reached.
17. The control method of an RFID interrogator according to claim 11, wherein at the collision resolution step, the command is retransmitted in the case in which a receiver timeout occurs.
18. The control method of an RFID interrogator according to claim 15, wherein the longest expected protocol data unit comprises PC, UII, and CRC16.
19. The control method of an RFID interrogator according to claim 17, wherein at the collision resolution step, the command is retransmitted only once when the receiver timeout occurs.
20. The control method of an RFID interrogator according to claim 17, wherein it is determined that the receiver timeout occurs when a tag response is not received within a predetermined time after the command is transmitted.