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Water-resistant material used for optical cable or cable cladding, connector and method for producing the same

A cable coating and water-blocking technology, which is applied in the direction of insulating cables, communication cables, cables, etc., can solve the problems of physical properties and quality degradation, and achieve the effects of fast absorption and expansion rates and large specific surface area

Inactive Publication Date: 2009-06-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent does not require additional equipment to allow the resin to melt uniformly to a greater extent, but also to maintain appropriate mechanical properties such as tensile strength and elongation, but it still does not eventually "eliminate" the melting caused by polyester processing. A "protrusion" that is uneven and affects quality defects, resulting in a certain degree of deterioration in the physical properties and quality of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 55% bicomponent fiber (polyester\polyvinyl chloride) and 45% OASIS SAF are fully mixed and opened, the opening rate is 95%, carded into a web in a carding machine, specific parameters: the speed of the circulating fan is 1000rmp , wind pressure set value is 10, main cylinder speed 1300m / min, front cylinder speed 1200m / min, upper doffer 53m / min, lower doffer 56m / min, main cylinder work roll 10.4m / min, front cylinder The working roll is 9.3m / min, laying a fiber web with a certain thickness, and letting the fiber web pass through the hot roll, the pressure of the pressing roll is 9mpa, the temperature of the upper pressing roll is 120°C, and the temperature of the lower pressing roll is 110°C to form non-woven fibers Net, fiber net surface density 45g / m 2 , the thickness is 0.24cm, the swelling value of the water-blocking material is 3880, the longitudinal fracture dry strength is 36N / 5cm, the transverse fracture dry strength is 76N / 5cm, the longitudinal wet strength is 30...

Embodiment 2

[0049] 50% bicomponent fibers (polyester\polypropylene) and 50% self-made SAF are fully mixed and opened, and the opening rate is 95%, and they are carded into a web under a carding machine. Specific parameters: the speed of the circulating fan is 1000rmp, the wind Pressure setting value is 10, main cylinder speed 1300m / min, front cylinder speed 1200m / min, upper doffer 52m / min, lower doffer 55m / min, main cylinder work roll 10.8m / min, front cylinder work roll 9.4m / min, the paved fiber web is cross-laid (4 layers), bonded by hot air, and reinforced into a non-woven fiber web under the condition of 120°C, and the surface density of the fiber web is 150g / m 2 , the thickness is 0.64cm, the swelling value of the water-blocking material is 3500, the longitudinal fracture dry strength is 173N / 5cm, the transverse fracture dry strength is 140N / 5cm, the longitudinal wet strength is 138N / 5cm, and the transverse wet strength is 112N / 5cm. The transverse elongation at break is 65%, 75%.

Embodiment 3

[0051] Fully mix 55% bi-component fiber (nylon\polyethylene) with 45% 0ASIS SAF, the opening rate is 95%, after opening, carding and other processes, it is laid into a fiber web of a certain thickness, specific parameters: cycle The fan speed is 1000rmp, the wind pressure setting value is 10, the main cylinder speed is 1300m / min, the front cylinder speed is 1200m / min, the upper doffer is 55m / min, the lower doffer is 57m / min, the main cylinder work roll is 10m / min, The front cylinder work roll is 9.3m / min, and the fiber web is laid out and bonded by hot air, and it is formed into a non-woven fiber web under the condition of 110°C, and the surface density of the fiber web is 45g / m 2 , the thickness is 0.23cm, the swelling value of water-blocking material is 3360, the dry strength at longitudinal fracture is 53N / 5cm, the dry strength at transverse fracture is 57.3N / 5cm, the wet strength in longitudinal direction is 48N / 5cm, and the wet strength in transverse direction is 44.3N / 5cm...

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Abstract

The invention relates to a water blocking material for optical cable and cable covering and connectors and a preparation method thereof. The material is formed by blending, webbing, solidifying, cutting and coiling one of two components in sequence, namely an ultra-water absorbing fiber, a low-melting point fiber and a basic fiber or an ultra-water absorbing fiber and a bicomponent fibre, according to a certain proportion. The ultra-water absorbing fiber is terpolymer crosslinked by acrylic acid (AA), methyl acrylate (MA) and a small quantity of special acrylate / methyl acrylate (SAMM); the low-melting point fiber is one of polyethylene, polypropylene, copolyamide and polyvinyl chloride fiber; and the basic fiber is one of polypropylene, terylene, nylon, viscose and other fibers. The swelling value of the material prepared is 400 to 9900; the intensity, the water absorbing and holding performance of the material can satisfy the demands of different working conditions; and the material also can be applied to the fields of medical service, health care, gardening, industrial fabrics and the like. The method can use the prior device and has the advantages of simple process, low cost, no pollution and degradation.

Description

technical field [0001] The invention relates to a water-blocking material and a preparation method thereof, in particular to a water-blocking material for coating and joints of optical cables or cables and a preparation method thereof. Background technique [0002] During the actual use of optical cables and cables, there is often a phenomenon that the moisture that stays outside the outer sheath of the cable and the connector penetrates into the internal wires. When this type of cable is laid underground in a humid area or exposed to rain and snow in the open air, a small amount of water can penetrate into the cable through the outer polyethylene insulation sheath to change its capacitance and reduce the signal strength; for optical cables, A small amount of water can also cause the inside of the cable to freeze, or put pressure on the optical components, which will greatly weaken the transmission of the signal; in addition, the entry of water will cause other problems, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44H01B7/28H01B11/22
Inventor 钟磊李国星王璐靳向煜吴海波殷保璞
Owner DONGHUA UNIV
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