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High-separate layer hollow container and its preparation technology

A hollow and container technology, applied in packaging, boxes, etc., can solve the problems of non-recyclable leftover materials, huge investment in equipment, high production costs, etc., and achieve the effects of environmental protection, improved mechanical properties, and firm bonding

Inactive Publication Date: 2003-04-30
QILU PETRO CHEM - SINOPEC
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AI Technical Summary

Problems solved by technology

The surface treatment method is to fluorinate or sulfonate the inner surface of the container during the blow molding process of the container, and improve the barrier property by changing the characteristics of the inner surface, but this method has serious environmental pollution and high equipment investment
The multi-layer co-extrusion method uses polyamide or EVOH as the barrier material, and relies on the adhesive to bond the barrier material and polyethylene together to form a five-layer or six-layer barrier container. The equipment investment of this method is huge, and the production process The leftover materials cannot be recycled, and the production cost is high

Method used

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Embodiment Construction

[0017] Components (B) and (C) are blended and extruded by an extruder to make a barrier masterbatch. In order to make EVOH have a good layered dispersion in the product, an appropriate relationship between EVOH and polyethylene under molding processing conditions should be selected. The melt viscosity ratio is very important. The present invention controls the melt viscosity ratio by selecting different ratios of components (B) and (C).

[0018] The fusing point is 164°C, the melt flow rate is 5.5g / 10min, and the ethylene content is 30Wt% ethylene / vinyl alcohol copolymer (EVOH), that is, component (A) and acrylic acid grafted low density polyethylene compatibilizer (melt Bulk flow rate is 1.5g / 10min, and graft rate is 2.0%) that component (B) carries out the melt extrusion preparation barrier masterbatch by the proportioning in table 1, and the screw rod diameter of used twin-screw extruder is 30mm, The processing temperature is 180-220° C., and the screw speed is 150 RPM. U...

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Abstract

A high-isolating lamella hollow container used as fuel oil tank or packing bottle of agricultural chemical is prepared through preparing the isolating mother material from EVOH and compatibilizer (acrylic acid grafted polyethylene) and mixing with polyethylene. It has high isolation performance to hydrocarbon compounds and better mechanical performance.

Description

technical field [0001] The invention relates to a hollow container product with a barrier function. The container is prepared from a polymer material composition. The composition is prepared as a barrier masterbatch with ethylene / vinyl alcohol copolymer (EVOH) and a compatibilizer, and It is prepared by dry blending polyethylene, and the layered hollow product prepared by using the composition has excellent barrier effect and good mechanical properties for hydrocarbons, especially solvents such as gasoline and xylene. Background technique [0002] With the development of the plastics industry, polyethylene is widely used to produce various hollow packaging containers due to its good physical and mechanical properties, molding processability and low cost. However, due to the leakage and swelling of polyethylene when storing hydrocarbons (such as xylene, gasoline, etc.), the application of polyethylene in fields such as automobile fuel tanks and pesticide packaging bottles is ...

Claims

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Application Information

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IPC IPC(8): B29C47/06B29C49/22B65D1/26B65D81/00
Inventor 陈永芬向明李震陈克强宋文韬孙扬宣
Owner QILU PETRO CHEM - SINOPEC
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