Method for producing ultra-extended pp/ldpe microporous products in ordinary injection machine

An injection machine, a common technology, applied in the direction of coating, etc., can solve the problems of difficult control of process conditions, uncertain super-ductile products, and inconvenient production, so as to reduce internal stress of products, reduce equipment operating costs, and operate convenient effect

Active Publication Date: 2017-05-17
芜湖昶茂塑业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is limited by the fact that it requires the use of a microfoaming injection machine as its essential device, which brings inconvenience to the corresponding production.
How such ultra-ductile articles can be achieved in conventional injection molding machines remains uncertain
Because the basic structure of conventional injection molding machines is not conducive to obtaining a better microporous structure, it is usually difficult to produce ordinary microporous products through ordinary injection machines without changing the equipment, let alone using Conventional injection molding machines are used to produce ultra-extensible microporous products, and its requirements for process condition control are more difficult

Method used

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  • Method for producing ultra-extended pp/ldpe microporous products in ordinary injection machine
  • Method for producing ultra-extended pp/ldpe microporous products in ordinary injection machine
  • Method for producing ultra-extended pp/ldpe microporous products in ordinary injection machine

Examples

Experimental program
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Effect test

Embodiment 1

[0030] First, make foam masterbatch. Weigh the raw materials according to the following weight: LDPE: 1.2kg, AC foaming agent: 0.3kg, the mass ratio of AC to LDPE is 1:4. After mixing AC foaming agent and LDPE raw materials, the foaming masterbatch is obtained through an ordinary plastic extruder, and the melt temperature is 165°C during the extrusion process;

[0031] Secondly, weigh the raw materials PP: 4.85KG, LDPE: 4.85KG, the ratio of LDPE to PP mass is 1:1, after mixing evenly, melt, extrude and pelletize through an ordinary plastic extruder, then add 300g of the above foam masterbatch , the mass percentage content of AC formed after mixing is 0.6%, the mass percentage content of PP is 48.5%, and the mass percentage content of LDPE is 50.9%;

[0032] Then, the materials prepared according to the above proportions are evenly mixed and divided into several parts, each with a mass of 24g, which is just enough to ensure that the cavity of the standard drawing mold used is ...

Embodiment 2

[0036] First, make the foaming masterbatch, weigh the raw materials according to the following weight: LDPE: 1.2kg, AC foaming agent: 0.3kg, the mass ratio of AC to LDPE is 1:4, after mixing the AC foaming agent and LDPE raw materials The foaming masterbatch is produced by ordinary plastic extruder, and the melt temperature is controlled at about 170°C during the extrusion process;

[0037] Next, weigh the raw materials PP: 6.47KG, LDPE: 3.23KG, the mass ratio of LDPE to PP is 1:2, after mixing evenly, melt, extrude and pelletize through an ordinary plastic extruder, then add 300g of the above-mentioned foaming masterbatch , the mass percentage content of AC formed after mixing is 0.6%, the mass percentage content of PP is 64.7%, and the mass percentage content of LDPE is 34.7%;

[0038] Then, mix the materials prepared according to the above ratio evenly and divide them into several parts, the mass of each part is about 48g, which is just enough to ensure that the cavity of t...

Embodiment 3

[0042] First, make foam masterbatch. Weigh the raw materials according to the following weight: LDPE: 1.2kg, AC foaming agent: 0.3kg, the mass ratio of AC to LDPE is 1:4. After mixing AC foaming agent and LDPE raw materials, the foaming masterbatch is obtained through an ordinary plastic extruder, and the melt temperature is controlled at about 165°C during the extrusion process;

[0043] Next, weigh the raw materials PP: 7.275KG, LDPE: 2.425KG, the mass ratio of LDPE to PP is 1:3, after mixing evenly, melt, extrude and pelletize through an ordinary plastic extruder, then add 300g of the above-mentioned foaming masterbatch , the mass percentage content of AC formed after mixing is 0.6%, the mass percentage content of PP is 72.75%, and the mass percentage content of LDPE is 26.65%;

[0044] Then, the materials prepared according to the above proportions are evenly mixed and divided into several parts, each with a mass of 24g, which is just enough to ensure that the cavity of t...

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Abstract

The invention discloses a method for producing a super-stretchable propene polymer (PP) / low-density polyethylene (LDPE) microporous product in an ordinary injection machine. The method comprises the following steps that (1) chemical foaming agent active carbon (AC) and LDPE raw materials are mixed, and foaming master batches are obtained through an ordinary plastic extruder; (2) the PP and the LDPE are mixed evenly, and PP / LDPE composite materials are formed; (3) the PP / LDPE composite materials obtained in the step (2) are fused, extruded and cut into pellets through the ordinary plastic extruder, and an even compound is obtained; (4) the foaming master batches obtained in the step (1) and the compound obtained in the step (3) are mixed evenly, and mixed materials are obtained; and (5) the mixed materials are added into the ordinary horizontal injecting molding machine, and the PP / LDPE microporous product can be produced. According to the method for producing the super-stretchable PP / LDPE microporous product in the ordinary injection machine, under the condition that the ordinary injection machine is not modified at all, the product with the malleability being higher than that of an ordinary injected product by over 2.8 times can be obtained only through proper raw material proportioning and process conditions.

Description

technical field [0001] The invention relates to a method for producing ultra-extended PP / LDPE microporous products in an ordinary injection machine, belonging to the technical field of processing and manufacturing polymer materials Background technique [0002] In recent years, plastic products have been widely used, among which injection products account for an important proportion due to their strong production adaptability, high efficiency, and easy automation. However, with the shortage of energy, especially oil, how to save plastic raw materials has led to the generation and development of foamed products. Usually, the cells inside the foamed product are formed by the plastic raw material during the molding process or by adding some gas. According to the different types of cell formation and foaming agent, it can include chemical foaming, physical foaming and mechanical mixing foaming. Among them, compared with physical foaming and mechanical mixing foaming, which req...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/00B29C45/77B29C45/78B29B9/06
CPCB29B9/06B29C45/0001B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C2945/76561B29K2023/0633B29K2023/12
Inventor 周应国吴文斌
Owner 芜湖昶茂塑业科技有限公司
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