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Molded article for medical use, extrusion molding method for molded article for medical use, and extrusion molding device for molded article for medical use

A technology for extrusion molding and medical use, which is applied in the fields of medical molded products, extrusion molding of medical molded products, and extrusion molding devices for medical molded products. It can solve problems such as deterioration and promote coloring, and achieve suppression of retention , low cost, and the effect of suppressing excessive shear heat generation

Active Publication Date: 2017-12-01
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, for medical products made of soft polyvinyl chloride resin compositions, under the action of radiation and heating, the soft polyvinyl chloride resin or its compounding agents will deteriorate / degenerate, resulting in defects such as accelerated coloring. situation

Method used

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  • Molded article for medical use, extrusion molding method for molded article for medical use, and extrusion molding device for molded article for medical use
  • Molded article for medical use, extrusion molding method for molded article for medical use, and extrusion molding device for molded article for medical use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 100 kg of polyvinyl chloride resin (manufactured by Kaneca Corporation, KS-1700, average polymerization degree: 1700), 52 kg of bis(2-ethylhexyl) phthalate (DEHP) as an ester plasticizer, and 52 kg of an epoxy Epoxidized soybean oil (manufactured by Co., Ltd. ADEKA, O-130P) 8 kg of plasticizer, Ca-Zn series stabilizer (manufactured by Co., Ltd. ADEKA, trade name: ADEKA STAB 37) as a stabilizer, calcium stearate content: about 7.57% by mass, zinc stearate content: about 10.1% by mass) 0.07 kg, and silicone oil (Shin-Etsu Chemical trade name: KF-50) 0.15 kg were mixed to prepare a polyvinyl chloride resin composition. In addition, in this polyvinyl chloride resin composition, calcium stearate and zinc stearate were contained in the quantity of 0.0053 kg and 0.00707 kg, respectively.

[0101] Next, the polyvinyl chloride resin composition was formed into pellets, and extruded using the above-mentioned extrusion molding device for molded medical products to obtain an inner di...

Embodiment 2

[0104] In Example 1, a tube was manufactured in the same manner as in Example 1 except that the compounding amount of the Ca-Zn-based stabilizer (manufactured by ADEKA Corporation, trade name: ADEKA STAB 37) was changed to 0.21 kg.

[0105] The whiteness and yellowness of the obtained tube were measured, and the results were 28.4 and 1.1, respectively. It can be seen from the above results that the tube of this example can exhibit high whiteness and low yellowness even when the amount of stabilizer (zinc soap and calcium soap) is small.

Embodiment 3

[0107] In Example 1, a tube was manufactured in the same manner as in Example 1 except that the compounding amount of the Ca-Zn-based stabilizer (manufactured by ADEKA Corporation, trade name: ADEKA STAB 37) was changed to 0.35 kg.

[0108] The whiteness and yellowness of the obtained tube were measured, and the results were 28.0 and 1.2, respectively. It can be seen from the above results that the tube of this example can exhibit high whiteness and low yellowness even when the amount of stabilizer (zinc soap and calcium soap) is small.

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Abstract

To provide a technology whereby a hardly colored molded article for medical use can be manufactured at a low cost. A molded article for medical use that is manufactured by extrusion molding a composition, said composition comprising, per 100 parts by mass of a polyvinyl chloride resin, 30-160 parts by mass of an ester plasticizer, 5-25 parts by mass of an epoxy plasticizer, and 0.01-0.1 part by mass (in total) of a zinc soap and calcium soap, wherein the white index (W.I.) of the molded article for medical use is 25 or more and the yellow index (Y.I.) thereof is 3.5 or less. In the extrusion molding of the molded article for medical use, a composition 11 in a solid state is supplied to a screw 21 of an extruder 20, said extruder being provided with grooves 22 having the same depth d, at a rate that is regulated so as to prevent shear heat generation in the composition within the extruder. Next, the solid composition supplied to the screw is heat-melted by heaters 41, 42 and 43 and the melted composition extruded from the extruder is molded into the shape of the molded article 12 for medical use in a die 50.

Description

technical field [0001] The present invention relates to a molded article for medical use, an extrusion molding method for a molded article for medical use, and an extrusion molding apparatus for a molded article for medical use. Background technique [0002] Conventionally, soft polyvinyl chloride resins have been widely used as medical materials. Medical supplies return the blood that comes into contact with them to the living body, or are inserted into living tissue, or are used near patients with weakened physical strength. Therefore, it is very necessary to consider safety. For this reason, medical supplies are usually used in a sterilized form, As its sterilization method, radiation sterilization, ethylene oxide sterilization, or high-pressure steam sterilization are generally employed. Among them, for radiation sterilization, there is no need to worry about the residue of ethylene oxide gas like ethylene oxide sterilization, and there is no need to expose medical devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00B29C47/92C08K5/10C08K5/1515C08L27/06B29K27/06B29C48/92
CPCC08J5/00C08K5/10C08K5/1515C08L27/06B29C48/92
Inventor 铃木隆
Owner TERUMO KK
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