阅读说明：本技术 双层玻璃热缩管的加工方法 (Processing method of double-layer glass heat-shrinkable tube ) 是由 马润 于 2020-06-26 设计创作，主要内容包括：本发明公开了一种双层玻璃热缩管的加工方法,本发明的双层玻璃热缩管的加工方法,包括以下步骤：S1)首先按照所需尺寸通过挤出机挤出套管,通过编织机将玻璃纤维编织在套管外侧形成玻璃纤维层,在玻璃纤维层外侧上油,高温定型后形成玻璃纤维管；S2)然后按照所需尺寸在挤出机上挤出内层热收缩管,将该内层热收缩管插入到上述玻璃纤维管中形成半成品的双层玻璃热缩管。通过上述加工方法制成的双层热收缩套管具备阻燃性高、拉伸强度大的优点。(The invention discloses a processing method of a double-layer glass heat-shrinkable tube, which comprises the following steps: s1) extruding the sleeve pipe through an extruder according to the required size, weaving glass fibers on the outer side of the sleeve pipe through a weaving machine to form a glass fiber layer, applying oil on the outer side of the glass fiber layer, and forming a glass fiber pipe after high-temperature shaping; s2) and then extruding the inner heat shrinkable tube on an extruder in accordance with the desired size, and inserting the inner heat shrinkable tube into the above glass fiber tube to form a semi-finished double glass heat shrinkable tube. The double-layer heat shrinkable sleeve prepared by the processing method has the advantages of high flame retardance and high tensile strength.)

1. A processing method of a double-layer glass heat-shrinkable tube is characterized by comprising the following steps:

s1) extruding the sleeve pipe through an extruder according to the required size, weaving glass fibers on the outer side of the sleeve pipe through a weaving machine to form a glass fiber layer, applying oil on the outer side of the glass fiber layer, and forming a glass fiber pipe after high-temperature shaping;

s2) and then extruding the inner heat shrinkable tube on an extruder in accordance with the desired size, and inserting the inner heat shrinkable tube into the above glass fiber tube to form a semi-finished double glass heat shrinkable tube.

2. The method of claim 1, wherein the double-layered glass heat shrinkable tube is heated to a temperature of 85 to 100 ℃ to have a shrinkage rate of 20 to 25% of a shrinkage rate at the time of full shrinkage.

3. The method of processing a double-glass heat shrinkable tube according to claim 2, wherein a clearance between an inner diameter of the glass fiber tube and an outer diameter of the inner heat shrinkable tube is 1 to 2 mm.

4. The method as claimed in claim 3, wherein the inner heat shrinkable tube is made of polyolefin material and the sleeve is made of PE material.

5. The method as claimed in claim 4, wherein the phosphorus ammonia flame retardant is sprayed on the outer surface of the inner layer heat shrinkable tube after the inner layer heat shrinkable tube is extruded in the step 2.

Technical Field

The invention relates to the technical field of polymer insulating materials, in particular to a processing method of a double-layer glass heat-shrinkable tube.

Background

The heat shrinkable sleeve is a special polyolefin heat shrinkable sleeve which can also be called as EVA material. The outer layer is made of high-quality soft cross-linked polyolefin material and inner layer hot melt adhesive through composite processing, the outer layer material has the characteristics of insulation, corrosion resistance, wear resistance and the like, and the inner layer has the advantages of low melting point, water resistance, sealing, high adhesion and the like. The heat-shrinkable tubing has the main functions of electrical insulation, rust prevention and corrosion prevention of welding spots, mechanical protection and wiring harness of connecting pieces, and is widely applied to the fields of electronics, communication, automobile, ship, aircraft manufacturing and the like. The existing manufacturing method of the double-layer heat shrinkable sleeve comprises the following steps: respectively extruding an inner layer heat-shrinkable tube and an outer layer heat-shrinkable sleeve on an extruder, sleeving the outer layer heat-shrinkable sleeve on the inner layer heat-shrinkable tube, and heating and shrinking the sleeved double-layer heat-shrinkable sleeve to obtain the heat-shrinkable sleeve. The double-layer heat shrinkable sleeve prepared by the method has the defects of low flame retardance and poor tensile strength.

Disclosure of Invention

In view of the above, the invention provides a processing method of a double-layer glass heat shrinkable tube, and the double-layer glass heat shrinkable tube manufactured by the processing method has the advantages of high flame retardancy and high tensile strength.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention relates to a processing method of a double-layer glass heat-shrinkable tube, which comprises the following steps:

s1) extruding the sleeve pipe through an extruder according to the required size, weaving glass fibers on the outer side of the sleeve pipe through a weaving machine to form a glass fiber layer, applying oil on the outer side of the glass fiber layer, and forming a glass fiber pipe after high-temperature shaping;

s2) and then extruding the inner heat shrinkable tube on an extruder in accordance with the desired size, and inserting the inner heat shrinkable tube into the above glass fiber tube to form a semi-finished double glass heat shrinkable tube.

Preferably, the jacketed double-layer heat-shrinkable sleeve is heated at 85-100 ℃ to a shrinkage of 20-25% of the shrinkage during full shrinkage

Preferably, the clearance between the inner diameter of the glass fiber pipe and the outer diameter of the inner-layer heat-shrinkable pipe is 1-2 mm.

Preferably, the inner heat shrinkable tube is made of polyolefin material, and the sleeve is made of PE material.

Preferably, in the step 2, after the inner layer heat shrinkable tube is extruded, the phosphorus-ammonia flame retardant is sprayed on the outer side surface of the inner layer heat shrinkable tube.

The invention has the beneficial effects that: the processing method of the double-layer glass heat-shrinkable tube comprises the following steps: s1) extruding the sleeve pipe through an extruder according to the required size, weaving glass fibers on the outer side of the sleeve pipe through a weaving machine to form a glass fiber layer, applying oil on the outer side of the glass fiber layer, and forming a glass fiber pipe after high-temperature shaping; s2) and then extruding the inner heat shrinkable tube on an extruder in accordance with the desired size, and inserting the inner heat shrinkable tube into the above glass fiber tube to form a semi-finished double glass heat shrinkable tube. The double-layer heat shrinkable sleeve prepared by the processing method has the advantages of high flame retardance and high tensile strength.

Detailed Description

The invention mainly aims to provide a method for processing a double-layer glass heat-shrinkable tube. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to specific embodiments.