TIGHT ZIP Russian patent published in 2011 - IPC A44B19/00 

FIELD: personal use articles.

SUBSTANCE: application describes a tight zip (10), having a pair of tapes (12), every of which has a multilayer structure including an inner layer (14) of a reinforcing textile material covered with a layer of a thermoplastic elastomer (TPE) to protect against a fluid medium (16). At the same time each tape (12) has teeth (21) levelled in a row (20) from a thermoplastic material, arranged at least on a part of one of its long edges (13a), the teeth (21) from the specified rows (20) of the specified pairs of the tapes (12) face each other and have appropriate upper and lower limiters (24, 26), and between the specified upper and lower limiters (24, 26) with the possibility of sliding there is a slider (22), which accordingly tightly connects or disconnects the teeth (21) levelled in a row, differing by the fact that the specified textile material of the internal reinforcing layer (14) is selected from a group, including a polyester (PE), preferably polyethylene terephthalate (PETP), polyamide (PA) and their mixtures or copolymers, the specified thermoplastic elastomer of the layer (16) that protects against the fluid medium is selected from a thermoplastic polyurethane elastomer (TPU-E) and a thermoplastic polyester elastomer (TPE-E), and the thermoplastic material of the teeth (21) is selected from polybutylene terephthalate (PBTP), acrylonitrile butadiene styrene (ABS), PA and their mixtures or copolymers.

EFFECT: increased reliability of tightness, structural integrity of the zip for a long period of time.

21 cl, 3 dwg