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Manufacture method of packaging material and products thereof

A technology of packaging materials and manufacturing methods, applied in the direction of packaging, wrapping paper, layered products, etc., can solve hidden safety concerns and other problems, and achieve the effect of crisp appearance, low cost, and good appearance

Inactive Publication Date: 2009-05-06
UNION PLASTIC HANGZHOU MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this situation, there will still be safety concerns when the human body comes into contact with the foamed product

Method used

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  • Manufacture method of packaging material and products thereof
  • Manufacture method of packaging material and products thereof
  • Manufacture method of packaging material and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Refer to attached Figure 1-8 :

[0044] The manufacturing method of packaging material of the present invention, comprises the steps:

[0045] 1. Making injection molds for plastic packaging materials;

[0046] 2. Inject plastic and gas into the feeding barrel 1, heat and stir with the screw 12 to melt the aforementioned plastic and mix with the aforementioned gas to form a mixed foamed plastic melt;

[0047] 3. Introduce the aforementioned mixed foamed plastic melt into the first storage barrel 2;

[0048]4. Extrude the plastic melt with a capacity suitable for one shot out of the first accumulator barrel 2, and at the same time perform pressure control and compensation in the cavity of the first accumulator barrel 2 to maintain the first accumulator barrel 2. Stable pressure in the 2 cavities of the storage barrel;

[0049] 5. The plastic melt that is pressed out of the first storage barrel 2 is introduced into the second storage barrel 31 through the first one-w...

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Abstract

The invention relates to a method for manufacturing packing materials, including the following steps of: producing an injection mold of plastic packing materials, preparing mixed expanded plastic solution, leading the solution to a first storage machine barrel, pressing the solution out from the first storage machine barrel to be guided to a second storage machine barrel through a first check valve, pressing the solution out from the second storage machine barrel to be guided to an injection machine barrel through the first check valve, simultaneously supplementing materials to the first storage machine barrel by a charging machine barrel, pressurizing the injection machine barrel until the mold is formed by injection, causing the surface of the plastic solution to be cool firstly, measuring the current shot size of the injection machine barrel as well as the current output speed of the charging machine barrel, and adjusting the output speed of the charging machine barrel as well as the rotation speed of a screw on the charging machine barrel to control the feeding speed of plastics and adjusting the admission velocity to match the feeding speed of the plastics. The packing materials obtained through the method comprise an outer layer containing no or little bubble and an inner core containing bubble, and the two sides of the inner core are covered by the outer layer.

Description

technical field [0001] The invention relates to a manufacturing method of a plastic packaging material and a product thereof. Background technique [0002] Most of the known packaging materials are made of foamed plastics. The use of foamed plastics to make packaging materials will not affect the use of packaging materials, but also can significantly save raw materials, and foamed plastics have good impact resistance, which can make the packaging materials durable and durable. reduce weight. [0003] However, the known technology of foamed plastics is not suitable for the manufacture of packaging materials. The air-containing inner core of the prepared foam packaging material is exposed, has low strength, poor surface hardness, is easily polluted, and has poor washability. Often only for one-time use. [0004] The conventional foaming technology is a method of using physical foaming agent or chemical foaming agent and molten plastic to obtain foam molding. Among them, ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/17B29C45/46B29C45/76B29C45/62B65D65/40B32B5/18B32B5/32
Inventor 陆纬庭陆孝庭
Owner UNION PLASTIC HANGZHOU MACHINERY
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