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Preparation method of medicinal plastic bottle

A technology of plastic bottles and plastic granules, which is applied in the field of preparation of pharmaceutical plastic bottles, can solve the problems of difficult to replace PET bottles, low production efficiency, low melt strength, etc. Shock, the effect of solving the lack of rigidity

Inactive Publication Date: 2020-05-29
宁波市华舟包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high specific heat capacity, it is not easy to dissipate heat during the production process, resulting in a bottle production efficiency about 25% lower than that of PET bottles; on the other hand, its molecular structure determines its low melt strength, and the produced containers are not thick or thin Average, high scrap rate
The defects in the above aspects limit the development of bottles in pharmaceutical packaging containers, and it has been difficult to replace PET bottles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The medicinal plastic bottle of this embodiment is made of the following raw materials in parts by weight: plastic granules: 80 parts, LDPE 15 parts; nucleating agent is 0.5 part of sorbitol nucleating agent.

[0013] The preparation method of this embodiment includes the following steps: a. weighing and mixing raw materials in proportion; b. blending modification: sending the mixed materials into a twin-screw extruder for blending modification to obtain composite modified polypropylene Material; c. Injection blowing, plasticizing, injection blowing: Plasticize the above-mentioned polypropylene composite modified material at 150-180°C, and then send it into the injection-blowing integrated machine for injection blowing, set the barrel temperature to 185 ℃; during injection, it is divided into three stages, the speed and pressure are: 70, 40-70, 10-20, 10-20, 15, 15, and the injection molded parison is initially cooled and then transferred to the blow molding station. Bl...

Embodiment 2

[0015] The production method of this embodiment is the same as that of Example 1, the difference is that the medicinal plastic bottle of this embodiment is made of the following raw materials in parts by weight: plastic granules: 80 parts, 14 parts of LDPE, maleic anhydride grafted poly 1 part of propylene; 0.5 part of sorbitol nucleating agent as the nucleating agent.

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Abstract

The invention discloses a preparation method of a medicinal plastic bottle, wherein the preparation method comprises the steps: proportionally mixing plastic particles and a nucleating agent, carryingout blending modification by using a twin-screw extruder to obtain a polypropylene composite modified material, and carrying out plastication, injection molding, blow molding and demolding on the polypropylene composite modified material to obtain the finished medicine bottle.

Description

technical field [0001] The invention relates to a preparation method of a medicine bottle, and in particular discloses a preparation method of a medicinal plastic bottle. Background technique [0002] In recent years, due to technological progress, human beings' attention to health and the enhancement of environmental awareness have led to the development of pharmaceutical packaging in a safer, more comprehensive and pollution-free direction. At present, more than 90% of the pharmaceuticals and health care products on the market still use glass bottles and PET bottles, but the above-mentioned packaging has its inherent shortcomings. Such as: glass bottles are brittle, easily broken, and cannot be squeezed, which brings inconvenience to production and transportation. Impact-resistant PET (polyethylene terephthalate, PET) bottles cannot be guaranteed to be sterile during the circulation process from the bottle manufacturer to the filling of the drug, which makes the safety of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L23/06C08L51/06
CPCC08L101/00C08L2201/08C08L2203/10C08L2205/03C08L2205/24C08L2207/066C08L23/06C08L51/06
Inventor 贾其伟
Owner 宁波市华舟包装有限公司
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