Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sealing material for cap and process for producing cap using the same

A technology for sealing materials and manufacturing methods, applied in the directions of sealing, transportation, packaging, packaging, etc., which can solve the problems of difficulty in ensuring the balance of lipophilicity and hydrophilicity, swelling of polyurethane elastomers, and low affinity of lower alcohols, and achieve swelling It has the effect of low absorbency and fragrance, less exudate, and high production efficiency.

Inactive Publication Date: 2007-01-31
TOYO SEIKAN KAISHA LTD +2
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the urethane elastomer in this sealing material has a narrow selection range in terms of the balance of lipophilicity and hydrophilicity, and its affinity for lower alcohols (especially ethanol) is extremely low, making it difficult to ensure an appropriate lipophilicity-hydrophilicity balance. , therefore, if it is used for the filling of alcoholic beverages, there is a problem of swelling of the polyurethane elastomer on the lid, as well as the transfer and residue of flavor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sealing material for cap and process for producing cap using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] Hereinafter, the present invention will be described in more detail by way of examples, but the present invention should not be construed as limited to these examples.

[0079] In the following synthesis examples, "%" all means "mass %".

[0080] The measurement of the isocyanate group content was performed in accordance with JIS K7301, and the measurement of the hydroxyl value was performed in accordance with the method prescribed in JIS K1601.

[0081] Raw materials used in synthesis examples and the like are as follows.

[0082] HDI: Hexamethylene diisocyanate

[0083] PTG-1000SN: polytetramethylene ether glycol, hydroxyl value = 112 mgKOH / g, average number of functional groups = 2, manufactured by Hodogaya Chemical Industry Co., Ltd.

[0084] P-1010: adipate-based polyester diol, hydroxyl value = 112 mgKOH / g, average number of functional groups = 2, manufactured by Kurare Co., Ltd.

[0085] F-510: adipate-based polyester triol, hydroxyl value = 336 mgKOH / g, avera...

Synthetic example 1

[0093] 70.7g of HDI, 7.6g of 1,3-BG, 6.6g of NPG and 15.2g of hydrogenated bisphenol A were added to the reaction vessel and reacted at 70°C for 5 hours to obtain a viscose with an average functional group number of 2 and an isocyanate group content of 17.6%. thick liquid. This is called polyisocyanate A.

Synthetic example 2

[0095] 178.9 g of HDI and 21.1 g of 1,3-BG were added to a reaction vessel, and reacted at 70° C. for 5 hours to obtain a viscous liquid having an average functional group number of 2 and an isocyanate group content of 19.7%. This is called polyisocyanate B.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a sealing material for caps, e.g., metal caps for food containers, which is reduced in swelling with substances dissolved out or alcoholic beverages and in adsorption of the odor thereof and which comprises a tough and nonyellowing polyurethane elastomer and has satisfactory sealing performance. and to provide a manufacturing method for the lid using the sealing material. The sealing material is made of the polyurethane elastomer that is given by reacting the following elements (A), (B), (C), where (A) is a polyisocyanate element which is given by modifying an aliphatic isocyanate and / or an alicyclic isocyanate, contains isocyanate groups of 5 to 38 mass%, and shows an average functional group number of 2 to 3, (B) is a polyol element which has a hydroxyl group value of 20 to 350 (mgKOH / g) and shows an average functional group number of 2 to 3, and (C) is a fatty acid glycerol ester having hydroxyl groups.

Description

technical field [0001] The present invention relates to a sealing material for caps comprising a polyurethane elastomer having low swelling property and aroma absorbability especially for alcoholic beverages, and a method for manufacturing a cap using the same. Background technique [0002] Conventionally, sealing materials for metal lids are often formed of a material mainly composed of vinyl chloride resin because of ease of handling and moldability. [0003] However, in such sealing materials for metal caps, since the vinyl chloride resin contains a large amount of plasticizers represented by dioctyl phthalate, there is a problem that grease and the like bleed out. This dioctyl phthalate is also a substance suspected of being an environmental hormone. As a solution to this problem, there has been proposed, for example, a sealing material for a metal cap composed of a vinyl chloride resin blended with an acylated ester derivative of a hydroxycarboxylic acid as a plasticiz...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65B65D53/06C08G18/32C08G18/79B65D53/00C08G18/36
CPCC08G18/36C08G18/6547B65D53/06C08G18/65C08K3/10
Inventor 森贺俊典青山直挥横田博荣
Owner TOYO SEIKAN KAISHA LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com