CN2336460Y

CN2336460Y - Coated expansion water strip for electric cable and optical cable

Info

Publication number: CN2336460Y
Application number: CN 98235228
Authority: CN
Inventors: 温科
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-25
Filing date: 1998-01-25
Publication date: 1999-09-01
Anticipated expiration: 2008-01-25

Abstract

The utility model relates to a coated expansion water strip for an electric cable and an optical cable, comprising a base strip and an expansion particle layer bonded on the base strip through adhesive, and is characterized in that the base strip is combined with a layer of thin film. The utility model has the advantages that the water strip is compounded with a thin film, so the two processes of wrapping the thin film and the water strip can be finished at one time without affecting the performance of resisting water, the technology is simplified, and the problemd that the petroleum jelly can be penetrated into the water strip to affect the performance of the water strip is solved; the utility model has low cost and convenient production and utilization without additional equipment and being affected by the environement.

Description

Cable, optical cable coated expansion water strip

The utility model relates to a kind of material water-proof material, relates in particular to a kind of cable, optical cable coated expansion water strip.

At present, cable, optical cable are the purpose that reaches the damp proof insulation that blocks water, normally take the method for cable core filled stone ointment, outsourcing expansion water strip, and existing waterstop is by base band and form (as shown in Figure 1) by the expansion particulate layer of adhesives on base band, in use, because the petroleum jelly that cable core is filled oozes out easily and is impregnated in the expansion water strip, the effect that blocks water of waterstop is reduced, even lose resistance effect.And be outside the cable core of filled stone ointment, to hold thin film earlier for addressing this problem the scheme of taking at present, stop petroleum jelly to exosmose, and then the bag waterstop.This scheme has the following disadvantages: 1. operation is more, needs bag thin film earlier, wraps waterstop again; 2. owing to behind the intact film of the cable core bag of the petroleum jelly of filling, need wrap waterstop again through subsequent processing, inter process every in, petroleum jelly oozes out with ining addition on a small quantity, during the bag waterstop, the petroleum jelly that oozes out on a small quantity still can be impregnated in the waterstop, the effect of reduction waterstop.

In addition, Chinese patent once disclosed a kind of waterstop, was to be base band with the polyester film, and the expansion particulate is directly sticking thereon by adhesive, thereby solved the problem of oozing out of petroleum jelly.But this scheme is actually irrealizable, according to being: the one, the expansion particulate can only bond with water-soluble binder and base band, and water-soluble binder can't bond with polyester film at all.The 2nd, bonding as if can make expansion particulate and polyester film with the organic solvent adhesive, but expanding layer through the organic solvent adhesives, can not expand after meeting water, and " the polyester film waterstop " made thus do not have water stop function at all, can not be called waterstop.

A kind of cable, the optical cable coated expansion water strip that the purpose of this utility model designs with regard to being to overcome above-mentioned existing in prior technology weak point, use this waterstop effectively to avoid petroleum jelly to ooze out, and can guarantee block-water performance, simplify operation, very easy to use.

The purpose of this utility model realizes by following measure: this cable, optical cable comprise base band and by the expansion particulate layer of adhesives on base band, wherein, are combined with thin film on base band with coated expansion water strip.

In the utility model, base band can combine by binding agent and film, also can be by heating directly and film combines.Can there be one deck cover layer on surface at expansion particulate layer by adhesives, also can not cover cap rock, and cover layer can be selected thin non-woven fabric.In the optional polyester film of film, polyethylene film, polypropylene film or the mylar any one.

The advantage that the utility model compared with prior art possesses is: owing to be compounded with film on waterstop, under the situation that does not influence its water resistance characteristic, make and hold film and finish with holding the waterstop two procedures, simplified technology, and thoroughly avoided the petroleum jelly infiltration to influence the disadvantage of waterstop performance, cost is low, need not increase equipment, be not subjected to environmental influence, produce, use all very convenient.

The drawing of accompanying drawing is described as follows:

Fig. 1 is existing common waterstop cross section structure schematic diagram.

Fig. 2 is the cross section structure schematic diagram of the utility model embodiment 1.

Fig. 3 is the cross section structure schematic diagram of the utility model embodiment 2.

Fig. 4 is the cross section structure schematic diagram of the utility model embodiment 3.

The utility model is done below in conjunction with embodiment (accompanying drawing) and is described in further detail.

Embodiment 1:

As shown in Figure 2: the coated expansion water strip of present embodiment comprises base band (3) and is bonded in expansion particulate layer (5) on the base band by adhesive (4), wherein, goes up in base band (3) and to be combined with thin film (1) by binding agent (2).

Embodiment 2:

As shown in Figure 3: the coated expansion water strip of present embodiment comprises base band (3) and is bonded in expansion particulate layer (5) on the base band by adhesive (4), wherein, upward be combined with thin film (1) in base band (3), and on expansion particulate layer (5), be stained with one deck thin non-woven fabric as cover layer (7) by binding agent (6) again by binding agent (2).

Embodiment 3:

As shown in Figure 3: the coated expansion water strip of present embodiment comprises base band (3) and is bonded in expansion particulate layer (5) on the base band by adhesive (4), wherein, going up direct heat seal in base band (3) has thin film (1), and is stained with one deck thin non-woven fabric as cover layer (7) by binding agent (6) again on expansion particulate layer (5).

Claims

1, a kind of cable, optical cable coated expansion water strip, it comprises base band (3) and is bonded in expansion particulate layer (5) on the base band, of the present utility model being characterised in that: be combined with thin film (1) on base band (3) by adhesive (4).

2, cable according to claim 1, optical cable coated expansion water strip is characterized in that: base band (3) combines by binding agent (2) and film (1).

3, cable according to claim 1, optical cable coated expansion water strip is characterized in that: the surface at expansion particulate layer (5) is bonded with one deck cover layer (7) by adhesive (6).

4, cable according to claim 3, optical cable coated expansion water strip is characterized in that: cover layer (7) is a thin non-woven fabric.

5, cable according to claim 1 and 2, optical cable coated expansion water strip is characterized in that: film (1) is any one in polyester film, polyethylene film, polypropylene film or the mylar.