ISO 4900:2011 PDF

Name: ISO 4900:2011 — Textile glass — Mats and fabrics — Determination of contact mouldability
SKU: ISO 4900:2011
Price: 25 EUR
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Textile glass — Mats and fabrics — Determination of contact mouldability

Название (английский):

ISO 4900:2011

Textile glass — Mats and fabrics — Determination of contact mouldability

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 15 ноября 2011 г.
Издание:: ISO IS 4900 edition 2 version 1
ICS:: 59.100.10

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Описание (английский):

ISO 4900:2011 specifies a method for the determination of the contact mouldability of textile glass mats and fabrics. NOTE The hand lay-up method of moulding is generally not regarded as lending itself to objective determinations. However, if the process is carried out by the same operator, useful comparisons can be drawn between results obtained with different mats or fabrics.

Abstract

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Упомянутые в описании и другие стандарты ISO

Overview

ISO 4900:2011 specifies a laboratory test method for determining the contact mouldability of textile glass mats and fabrics used in composite hand lay-up processes. The standard defines the mould geometry, specimen preparation, resin system, timing limits and how to record and report the radius at which a reinforcement will no longer conform to a stepped mould. ISO 4900:2011 is intended for objective comparison of mats and fabrics when the hand lay-up process is carried out consistently by the same operator.

Key topics and requirements

Scope: Test method for textile glass mats and fabrics - contact mouldability under hand lay-up conditions.

Specimen dimensions: Rectangular strips, 950 mm ± 10 mm long and 150 mm ± 2 mm wide. Test three specimens cut parallel and three cut perpendicular to fabric length.

Conditioning: Specimens conditioned for at least 6 hours in a standard atmosphere per ISO 291; tests performed under the same conditions.

Mould: A glass-fibre-reinforced plastic step/radius mould with progressively decreasing radii marked at each ridge.

Resin system: A standard hand-layup polyester resin (user/supplier to agree), incorporating methyl ethyl ketone peroxide (MEKP) catalyst and cobalt naphthenate accelerator to give a pot life ≈ 30 minutes at test temperature.

Equipment: Balance (0.1 g), stopwatch, 50 mm brush, sharp knife, mould release, scraper and solvents.

Procedure highlights:

Apply thin resin coat, lay specimen on mould, work the material with the brush into successive corrugations, record the working time (max 5 min).
Note the ridge at which the specimen no longer conforms; record mouldability as the previous (less severe) radius.
Weigh specimen before and after to determine reinforcement and resin masses.

Results:

Report average mouldability radius for the three parallel and three perpendicular specimens (nearest 1 mm).
Calculate the reinforcement-to-resin mass ratio (R) for each laminate and report averages (one decimal).

Reporting: Include standard reference, material and resin descriptions, resin formulation and viscosity, individual and average mouldability values, working time, reinforcement/resin ratios, test date and any deviations.

Applications and users

Quality control and incoming inspection for textile glass mats and fabrics used in marine, automotive, wind energy and general composite manufacturing.

Product development and comparative evaluation of reinforcements for hand lay-up moulding.

Test laboratories, material suppliers, composite manufacturers, and specification writers who need objective data on how easily a reinforcement will conform to contoured moulds.

ISO 4900:2011 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

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