Process formula and preparation method of piston for pen type syringe

A pen-type syringe and piston technology, applied in the direction of hypodermic injection equipment, etc., can solve the problems of insufficient cleanliness of the production environment, unguaranteed product quality, high production costs, etc., to reduce the factors of human error and prevent chip shedding , The effect of good product performance

Active Publication Date: 2012-07-18
SHANDONG PHARMA GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional pharmaceutical synthetic pistons are produced from polyisoprene rubber and related accessories through more than 20 processes such as rubber mixing, vulcanization, tableting, slicing, cold punching, siliconization, and refrigeration. The production process

Method used

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  • Process formula and preparation method of piston for pen type syringe
  • Process formula and preparation method of piston for pen type syringe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw material formula is: chlorinated butyl rubber 44500g, calcined kaolin 41500g, tert-octylphenol formaldehyde resin 655g, stearic acid 480g, zinc oxide 2260g, modified polyethylene 880g, titanium dioxide 1180g, semi-reinforced furnace carbon black 156g and magnesium oxide 60g.

[0016] The preparation method of a piston for a pen-type syringe comprises the following steps: (1) batching and banburying; (2) parking for 1-10 days; (3) preforming; (4) parking for 12 hours-10 days; Vulcanization thermoforming in a 300,000-class clean area environment; (6) edge removal in a 300,000-class clean area environment; (7) sieving in a 100,000-class clean area environment; (8) cleaning in a 10,000-class clean area environment , siliconization, drying, packaging.

[0017] Batching and banburying refers to mixing all kinds of raw materials evenly together, banburying in the banbury mixer for 8-10min, the glue discharge temperature is 95-105℃, and then adding it to the XKY-550 ru...

Embodiment 2

[0105] Change the vulcanization time to 260s, and the other preparation steps are the same as in Example 1.

Embodiment 3

[0107] Change the vulcanization time to 200s, and other preparation steps are the same as in Example 1.

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Abstract

A process formula and a preparation method of a piston for a pen type syringe belong to the field of officinal syringe pistons. The piston is characterized by being prepared by the following raw materials by weight: 44500 parts of chlorinated butyl rubber, 41500 parts of calcined kaolin, 655 parts of tertiary octyl phenol formaldehyde resin, 480 parts of stearic acid, 2260 parts of zinc oxide, 880 parts of modified polyethylene, 1180 parts of titanium dioxide, 156 parts of half-reinforcing furnace black and 60 parts of magnesium oxide. The preparation method is characterized by including (1) dosing and banburying; (2) placing the mixture statically for 1 to 10 days; (3) pre-forming; (4) placing the mixture statically for 12 hours to 10 days; (5) conducting vulcanizing heat forming in 0.3-million-grade clean area environment; (6) conducting edge removing in the 0.3-million-grade clean area environment; (7) conducting scrap screening in 0.1-million-grade clean area environment; and (8) conducting washing, silicification, drying and packaging in myriad-grade clean area environment. The process is simple, safe, environment-friendly and high in cleaning degree.

Description

technical field [0001] The invention provides a technical formula and a preparation method for a plunger for a pen-type syringe, belonging to the field of plunger for medicinal syringes. Background technique [0002] The piston of a medical syringe is the most commonly used sealing element in the field of pharmaceutical packaging materials. It is used in the cavity of the syringe to prevent fluid leakage and facilitate the injection of drugs. Traditional pharmaceutical synthetic pistons are produced from polyisoprene rubber and related accessories through more than 20 processes such as rubber mixing, vulcanization, tableting, slicing, cold punching, siliconization, and refrigeration. The production process is cumbersome and It consumes time and pollutes the environment. Not only does the production cost remain high, but also the quality of the product cannot be guaranteed due to the insufficient cleanliness of the production environment. A low-cost, simple process, safe and...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08L61/06C08L23/26C08K3/34C08K3/22C08K3/04B29C69/00B29B7/00A61M5/315
Inventor 扈永刚冯加友郑述玲毕研祯
Owner SHANDONG PHARMA GLASS
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