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Diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and preparation method thereof

A heat-shrinkable sleeve and optical cable splicing technology, applied in the field of materials, can solve the problems of air leakage of the optical cable splice box, no heat-shrinkable sleeve, failure of the connection and bonding of the base of the optical cable splice box, etc., and achieves good kerosene resistance effect.

Active Publication Date: 2014-07-02
CYG CHANGTONG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the optical cable splice box is often exposed to diesel and kerosene. Under this environment, the heat-shrinkable sleeve produced at home and abroad is not resistant to diesel and kerosene. After soaking, the base material of the heat-shrinkable sleeve and the hot-melt adhesive will swell. , resulting in failure of bonding with the base of the cable connection box, air leakage in the cable connection box, and inflatable protection cannot be achieved. Heat-shrinkable sleeve that can withstand diesel oil and kerosene immersion for a long time and seal without failure

Method used

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  • Diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and preparation method thereof
  • Diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and preparation method thereof
  • Diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] High-density polyethylene (5000s, density 0.954g / cm 3 ) 15.0%; high-density polyethylene (C911A, density 0.954g / cm 3 ) 35.0%; medium density polyethylene (0588, density 0.932g / cm 3 ) 25.0%; linear low density polyethylene (7042, density 0.918g / cm 3 ) 20.0%; primary antioxidant (1010) 0.6%; secondary antioxidant (DSTDP) 0.4%: black masterbatch, 2.0%, processing aid PPA, 2.0%.

[0043] Base material batching→mixing→extrusion granulation→extrusion tube blank→radiation crosslinking→expansion

[0044] After mixing, put the uniformly mixed base material into the discharge port of the twin-screw extruder, and extrude the granulated material according to the following process:

[0045]Barrel: first zone: 120±20°C, second zone: 140±20°C, third zone: 160±20°C, fourth zone: 200±20°C, fifth zone: 220±20°C, sixth zone Zone: 220±20°C, seventh zone: 220±20°C; machine head: 220±20°C.

[0046] The substrate granulated material obtained by the above process is dried and then sent to...

Embodiment 2

[0050] High-density polyethylene (5000s, density 0.954g / cm 3 ) 25.0%; high-density polyethylene (C911A, density 0.954g / cm 3 ) 25.0%; medium density polyethylene (0588, density 0.932g / cm 3 ) 25.0%; low-density polyethylene (FB3003, density 0.918g / cm 3 ) 20.0%; primary antioxidant (1010) 0.6%; secondary antioxidant (DSTDP) 0.4%: black masterbatch, 2.0%, processing aid PPA, 2.0%.

[0051] Base material batching→mixing→extrusion granulation→extrusion tube blank→radiation crosslinking→expansion

[0052] After mixing, put the uniformly mixed base material into the discharge port of the twin-screw extruder, and extrude the granulated material according to the following process:

[0053] Barrel: first zone: 120±20°C, second zone: 140±20°C, third zone: 160±20°C, fourth zone: 200±20°C, fifth zone: 220±20°C, sixth zone Zone: 220±20°C, seventh zone: 220±20°C; machine head: 220±20°C.

[0054] The substrate granulated material obtained by the above process is dried and then sent to the...

Embodiment 3

[0057] The performance detection of embodiment 3 heat-shrinkable sleeve

[0058] The hot melt adhesive is coated on the inner surface of the heat-shrinkable sleeve, and the performance requirements to be met are shown in Table 1:

[0059] Table 1 Performance requirements of heat-shrinkable tubing

[0060]

[0061]

[0062] The heat-shrinkable sleeves of Example 1 and Example 2 both meet the performance requirements shown in Table 1, and reach a shrinkage requirement of more than 6 times.

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Abstract

The invention provides a diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and a preparation method thereof. Firstly a formula of a radiation crosslinking polyolefin base material is broken through, high density polyethylene with high mechanical strength and high crystallization property is selected as a main ingredient, a small amount of flexible medium density polyethylene with excellent low temperature performance and linear low density polyethylene with good processability are taken as auxiliary materials, and working procedures such as preparing, mixing, pelletizing by extrusion, sheet extruding and irradiating are carried out, so that the heat-shrinkable tube is obtained. The heat-shrinkable tube can realize the shrinkage requirement reaching 6 times according to deviation between an optical fiber splice closure and the diameter of an optical fiber and can be used normally after being soaked by diesel and kerosene for a long time.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a high-shrinkage ratio heat-shrinkable sleeve for sealing diesel and kerosene-resistant optical cables and a preparation method thereof. Background technique [0002] As a commonly used shrink sealing material, the heat shrinkable sleeve is composed of a radiation crosslinked polyolefin substrate and hot melt adhesive. The polyolefin material is coated with a special hot melt after extrusion, radiation crosslinking, and expansion. When the optical cable splice box or terminal box is connected to the optical cable, it is first inserted into the optical cable. After the optical cable is connected, the heat-shrinkable sleeve is heated and shrunk on the optical cable and the base conduit of the splice box, so that the optical cable and the optical cable splice box are formed. Adhesive sealing to ensure that there is no air leakage when the cable connection box is inflat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/134C08K5/372B29C47/92F16L9/12B29C48/92
CPCB29B7/005B29C2947/92647B29B7/72B29B7/46B29C47/0066B29C47/0023B29C47/92B29B9/06B29B9/16B29C47/385B29B9/12B29C48/92B29C2948/92704C08J7/0427C08J2323/06C08J2477/00C08L23/06C08L2203/18C08L2203/20C08L2205/025C08L2205/035C08L2207/062C08L2312/06C09J177/00C08L23/0815C08K5/1345C08K5/372C08L77/00C08L23/0869B29C48/0022B29C48/09B29C48/397B29C2948/92647B29C2948/92895B29C2948/92904
Inventor 徐焕辉谢少明李绽滨易杜容耀强
Owner CYG CHANGTONG NEW MATERIAL
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