Method of preparing pipe by double-melting-point composite film

A composite film and double melting point technology, which is applied in applications, household appliances, tubular objects, etc., can solve the problems of low cost and increased production cost, and achieve the effect of improving breaking strength and sealing degree

Inactive Publication Date: 2017-08-11
FUJIAN BAICHUAN RESOURCES RECYCLING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of PET is low, and people are discussing the direction of using PET to make pipes. Since PET cannot be directly inje

Method used

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  • Method of preparing pipe by double-melting-point composite film

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Embodiment Construction

[0019] In the method for preparing pipes using a double-melting point composite film of the present invention, the used double-melting point composite film is as follows: figure 1 As shown, it includes an upper surface layer 100, an interlayer 200 and a lower surface layer 300 that are combined together. The upper surface layer 100 and the lower surface layer 300 are both PE layers, and the interlayer 300 has a melting point of 240-260°C. The high melting point PET layer. The upper surface layer 100, the interlayer 200 and the lower surface layer 300 can be composited together by conventional extrusion biaxial stretching process.

[0020] As a preferred option, the thickness ratio of the upper surface layer 100, the interlayer 200 and the lower surface layer 300 is 5-20:60-90:5-20.

[0021] As a preferred option, the total thickness of the composite membrane of the present invention is 5-100 filaments.

[0022] As a preferred option, the width of the composite film of the pr...

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Abstract

The invention discloses a method for preparing a pipe by a double-melting-point composite film. The double-melting-point composite film comprises an upper surface layer, an interlayer and a lower surface layer which are combined together. Each of the upper surface layer and the lower surface layer is a PE layer or a first PET layer, the interlayer is a second PET layer, and the melting point of the first PET layer is lower than that of the second PET layer. When the pipe is prepared, the double-melting-point composite film is wound around a pipe die along a spiral line to form a pipe-shaped winding shell, the winding shell is heated, the upper surface layer and the lower surface layer are molten, seep into and cover all winding overlapped positions of the winding shell, and after cooling, demolding is conducted, and the pipe with the surface with the good sealing effect is obtained. According to the method, the high-melting-point PET is a framework, the pipe is prepared by the double-melting-point composite film with the low-melting-point PET or PE as the skin layer, and the cost is low; and by means of the double-melting-point composite film, the higher modulus and the modulus of stretch are reached through bidirectional stretching, and the strength of the pipe is higher.

Description

technical field [0001] The invention relates to the field of pipe material preparation, in particular to a method for preparing pipe material by using a double-melting point composite film. Background technique [0002] In the prior art, pipes are usually injection-extruded from plastic materials such as PVC, PP, PB or PA. Since these plastics are not stretched to achieve a higher modulus, the strength of the pipe is relatively low. In order to improve the strength of the pipe, it can usually only be achieved by increasing the wall thickness of the pipe, thus increasing the production cost. The cost of PET is low, and people are discussing the direction of using PET to make pipes. Since PET cannot be directly injected into pipes, it must be modified before it can be used for injection pipes, which also increases production costs. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing pipes with double melting point com...

Claims

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Application Information

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IPC IPC(8): B29D23/00B29K67/00
CPCB29D23/001B29K2867/003
Inventor 张飞鹏
Owner FUJIAN BAICHUAN RESOURCES RECYCLING TECH
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