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Polyamide thermal insulation strip preparation process

A preparation process and heat insulation strip technology, which is applied in the production process of heat insulation strips, can solve the problems of rough and uneven nylon 66 crystal grains, rough product surface, and difficult to guarantee dimensional accuracy, and achieve good anti-ultraviolet aging performance and overall Good mechanical properties, good heat and weather resistance

Inactive Publication Date: 2016-02-03
上海优泰装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing heat insulation strip production process mainly adopts the method of venting the melt, stretching it through the mold, and directly flowing water to form it. The disadvantage of this process is that when the melt in the vent section enters the mold, it is easy to cause mold jamming and strip breakage, and at the same time, it is caused by direct cold water. The surface of the product is rough, the dimensional accuracy is difficult to guarantee, and the phenomenon of oil pollution is obvious
In addition, due to the distance from the extruder to the mold in the vent section, the instantaneous temperature difference is large, and the crystal grains of nylon 66 are rough and uneven, which leads to poor overall mechanical properties of the product.

Method used

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  • Polyamide thermal insulation strip preparation process

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Effect test

Embodiment 1

[0025] Example 1: The preparation of polyamide heat insulation strips, raw material PA66, glass fiber, lubricating dispersant, coupling agent, anti-ultraviolet aging additives are added to a twin-screw granulator in a certain proportion, and the material is modified; In terms of weight percentage, PA6668 parts, 24 parts of glass fiber, 5.2 parts of toughening agent, 1.2 parts of lubricating and dispersing agent, 1.5 parts of coupling agent, 0.1 part of anti-ultraviolet aging agent; the temperature is controlled at 250 ° C; the modified raw material Put it into the barrel for drying, the temperature is controlled above 90°C, and the drying time is 4 hours; the dried raw materials are extruded through the extruder and the corresponding precision mold, and the temperature is controlled above 260°C; the semi-finished product Use a fully automatic laser coding machine to carry out coding marking; pack the marked products according to customer requirements, divide them into straight ...

Embodiment 2

[0026] Embodiment 2: The preparation of polyamide heat-insulating strip, raw material PA66, glass fiber, lubricating dispersant, coupling agent, anti-ultraviolet aging auxiliary agent are added into twin-screw granulator according to certain ratio, carry out material modification; In terms of weight percentage, PA6668 parts, 24 parts of glass fiber, 4.8 parts of toughening agent, 1.5 parts of lubricating and dispersing agent, 1.4 parts of coupling agent, 0.3 part of anti-ultraviolet aging agent; the temperature is controlled at 250 °C; the modified raw material Put it into the barrel for drying, the temperature is controlled above 90°C, and the drying time is 4 hours; the dried raw materials are extruded through the extruder and the corresponding precision mold, and the temperature is controlled above 260°C; the semi-finished product Use a fully automatic laser coding machine to carry out coding marking; pack the marked products according to customer requirements, divide them i...

Embodiment 3

[0027] Embodiment 3: the preparation of polyamide heat-insulating strip, raw material PA66, glass fiber, lubricating dispersant, coupling agent, anti-ultraviolet aging auxiliary agent are added into twin-screw granulator according to certain ratio, carry out material modification; In terms of weight percentage, PA6666 parts, 25 parts of glass fiber, 5.5 parts of toughening agent, 1.3 parts of lubricating and dispersing agent, 1.8 parts of coupling agent, 0.4 part of anti-ultraviolet aging agent; the temperature is controlled at 250 ° C; the modified raw material Put it into the barrel for drying, the temperature is controlled above 90°C, and the drying time is 4 hours; the dried raw materials are extruded through the extruder and the corresponding precision mold, and the temperature is controlled above 260°C; the semi-finished product Use a fully automatic laser coding machine to carry out coding marking; pack the marked products according to customer requirements, divide them ...

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Abstract

The invention discloses a polyamide thermal insulation strip preparation process. The process mainly comprises the steps of granulation, drying and extrusion molding. According to the invention, raw materials are added into a twin-screw granulator according to a certain ratio, such that granulation modification is carried out, wherein a temperature is 250 DEG C; the modified raw material is dried in a cylinder, wherein a temperature is controlled at above 90 DEG C, and a drying time is 4h; the dried raw material is subjected to extrusion molding with an extruder and a corresponding precise mold, wherein the temperature is controlled at above 260 DEG C. The preparation process is simple. The prepared polyamide thermal insulation strip has good thermal insulation effect, good heat resistance, good weather resistance, and good ultraviolet aging resistance. During the processing process, mold blockage and strip breaking phenomena are prevented. The thermal insulation strip has smooth surface, high dimensional precision, and good overall mechanical properties.

Description

technical field [0001] The invention relates to a production process of a heat-insulation strip, in particular to a preparation process of a polyurethane heat-insulation strip. Background technique [0002] Countries such as Germany and Italy have been exploring heat insulation strip products for many years. The high-performance glass fiber reinforced nylon 66 aluminum profile door and window heat insulation strip developed by them has reached a relatively high level in various performance indicators. [0003] The existing heat insulation strip production process mainly adopts the method of venting the melt, stretching it through the mold, and directly flowing water to form it. The disadvantage of this process is that when the melt in the vent section enters the mold, it is easy to cause mold jamming and strip breakage, and at the same time, it is caused by direct cold water. The surface of the product is rough, the dimensional accuracy is difficult to guarantee, and the phe...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K7/14
Inventor 王中水
Owner 上海优泰装饰材料有限公司
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