CN103027715A - Biodegradable type disposable biopsy forceps and manufacturing method thereof - Google Patents

Abstract

The invention provides biodegradable type disposable biopsy forceps and a manufacturing method thereof. The biodegradable type disposable biopsy forceps are formed by proportioning biodegradable macromolecular main ingredients and enhancers of biodegradable base materials. The injection molding process of the biopsy forceps includes that the temperature of a feed inlet is 145-160 DEG C, the temperature of a compression section is 150-165 DEG C, the temperature of a metering section is 160-175 DEG C, and the temperature of a nozzle is 165-170 DEG C; the temperature of a mould is 10-20 DEG C; the injection pressure is 65 Mpa in a first stage, 75 Mpa in a second stage and 55 Mpa in a third stage; the injection period is 51-56 seconds; the dwell time is 0 second; and the screw speed is 180 turns per minute. Thus, biodegradable type biopsy forceps products can be obtained, the biopsy forceps do not need to be incinerated after being used and can be absolutely biodegraded in the natural environment through landfill, and therefore the purposes of being low-carbon, energy-saving and environment-friendly can be achieved.

Description

Degradation type disposable biopsy forceps and method for making

Technical field

The present invention relates to the disposable medical instrument field, particularly relate to a kind of degradation type disposable biopsy forceps and method for making.

Background technology

" biopsy forceps " is the taking-up for the sample of tissue such as human body such as tract and foreign body, present " biopsy forceps ", make through chromium plating of rustless steel or other metal material, the biopsy forceps that metal is made is because of its price, use again autoclave sterilization after all cleaning after each the use, as everyone knows, sterilization is total not as sterilizing thoroughly, especially in remote small towns clinic, sterilizing equipment decontaminating apparatus is relatively backward, therefore some metallic weapons of report are arranged because of the cross infection of sterilization imprecision iatrogenic disease.For this reason research and development " degradation type disposable biopsy forceps and method for making "; important practical value and clinical meaning are arranged; can not only disposablely use; stop the mutual cross infection of iatrogenic disease; and can avoid using rear burning disposal; avoid contaminated environment, to protect mankind is healthy, and again environmental protection and energy saving.But up to now, at home and abroad there is no research and report about degradation type disposable biopsy forceps and method for making.

Summary of the invention

First purpose of the present invention provides the degradation type disposable biopsy forceps.

Second purpose of the present invention provides degradation type disposable biopsy forceps and method for making.

Degradation type disposable biopsy forceps of the present invention is made of the degradable base material, and its composition and weight proportion are:

100 parts of degradable macromolecule major ingredients, reinforcing agent 16-35 part;

Described macromolecule major ingredient is: polylactic acid (being called for short PLA);

Described reinforcing agent is: EMFORCE BIO, modified calcium carbonate, calcium carbonate superfine powder or their copolymer or blend.

The invention provides the preparation method of degradation type disposable biopsy forceps, step and condition are as follows:

The first step: the base material that proportioning is good, send in the homogenizer, rotating speed 600-800 rev/min, mixed 5-7 minute, make uniform base material or base material compound;

Second step: base material or base material compound that the first step is made; respectively under 50-80 ℃; vacuum drying 4-7 hour, to send in the single screw extrusion machine, temperature is controlled at: feeding section 60-95 ℃; batch mixing segment 80-125 ℃; fluxing zone 125-180 ℃, head 115-175 ℃, screw speed 30-60 rev/min; after the pelleter pelletizing, make respectively the pellet of above-mentioned base material.

The 3rd step: with above-mentioned base material pellet, under 48-52 ℃, during vacuum drying 3-6, stand-by;

The 4th step: with the pellet of above-mentioned oven dry, join in the injection machine hopper, carry out carrying out injection mo(u)lding for the specification of making the degradation type disposable biopsy forceps;

Barrel temperature is set as: charging aperture 145-165 ℃, and compression section 150-165 ℃, metering section 160-175 ℃, nozzle 165-170 ℃;

Mold temperature is: 10-20 ℃;

Injection pressure is: one-level 65,75, three grades of 55Mpa of secondary;

Injection cycle is: 51-56 second;

Dwell time is: 0 second;

Screw speed is: 180 rev/mins;

Through after the injection mo(u)lding, just can be made into the disposable biopsy forceps of degradable various model.

Table 1 has provided the used biodegradation base material prescription of the disposable biopsy forceps of part model.

Table 1

Beneficial effect: the base materials employed preferred polylactic acid of degradation type disposable biopsy forceps is that material of main part is with formulated with corresponding adjuvants such as modified calcium carbonates during production provided by the invention.Polylactic acid (PLA) is to can be used for one of degradable polymer material of human body through the only a few that FDA ratifies, has good biocompatibility, modified calcium carbonates etc. also are the environment-friendly degradable materials, and price is very cheap, mutually polymerization or mixing, can greatly reduce cost, and nontoxic, suit very much to be used for making disposable medical instrument, this degradation type disposable biopsy forceps degradation speed is fast, reasonable compatibility, safe and applicable.And when producing, its degradable material injection temperature that is used for disposable biopsy forceps is low more than petroleum-based plastics, has saved power consumption, the collaborative purpose that reduces cost and environmental protection and energy saving that reaches.

The specific embodiment

The prescription that following examples adopt is the prescription of above-mentioned table 1.

The injection molding forming method of embodiment 1 degradation type disposable biopsy forceps:

The first step, vacuum drying: will fill a prescription 1 or fill a prescription 2 degradable base material pellet under 50 ℃, vacuum drying 4 hours, stand-by.

Second step, injection mo(u)lding: the prescription 1 that will dry or 2 the degradable base material pellet of filling a prescription join and carry out injection mo(u)lding in the injection machine hopper.

Barrel temperature is set as: 155 ℃ of charging apertures, 160 ℃ of compression sections, 170 ℃ of metering sections, 170 ℃ at nozzle;

Mold temperature is: 20 ℃;

Injection pressure is: one-level 65,75, three grades of 55Mpa of secondary;

Injection cycle is: 55 seconds;

Dwell time is: 0 second;

Screw speed is: 180 rev/mins;

Obtain adopting prescription 1 or 2 the degradation type disposable biopsy forceps of filling a prescription.

Above-described embodiment is described in detail the biological degradation type disposable biopsy forceps, not only preparation technology is detailed rationally, and production cost is lower, therefore, degradation type disposable biopsy forceps of the present invention has good value for clinical application, and puts forth effort to realize environmental protection and energy saving.

Claims (2)

1. degradation type disposable biopsy forceps, it is characterized in that: described biopsy forceps is made of the degradable base material, and its composition and weight proportion are:

100 parts of degradable macromolecule major ingredients, reinforcing agent 16-35 part;

Described macromolecule major ingredient is: polylactic acid (being called for short PLA);

Described reinforcing agent is: EMFORCE BIO, modified calcium carbonate, calcium carbonate superfine powder or their copolymer or blend.

2. a method for preparing degradation type disposable biopsy forceps as claimed in claim 1 is characterized in that, step and condition are as follows:

The first step, vacuum drying: will be for the degradable base material pellet of biopsy forceps, under 48-52 ℃, during vacuum drying 3-6, stand-by;

Second step, injection mo(u)lding: above-mentioned oven dry is used for making the degradable base material pellet of disposable biopsy forceps, joins in the injection machine hopper, carry out carrying out injection mo(u)lding by all size of degradation type disposable biopsy forceps;

Barrel temperature is set as: charging aperture 145-165 ℃, and compression section 150-165 ℃, metering section 160-175 ℃, nozzle 165-170 ℃;

Mold temperature is: 10-20 ℃;

Injection pressure is: one-level 65,75, three grades of 55Mpa of secondary;

Injection cycle is: 51-56 second;

Dwell time is: 0 second;

Screw speed is: 180 rev/mins.