materials and qualification procedures for ships(m) means by which the mat and roving components are...

Materials and Qualification Procedures for Ships

Book K

Procedure 14-2

Approval of Fibre Reinforcements

Revision 1, December 2013

Material and Qualification Procedures for Ships Book K Procedure 14-2

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Lloyd’s Register Group Limited, its subsidiaries and affiliates and their respective officers, employees or agents are, individually and collectively, referred to in this clause as ‘Lloyd’s Register’. Lloyd’s Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Lloyd’s Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.

© Lloyd's Register Group Limited 2014. All rights reserved.

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Approval of Fibre Reinforcements

1 Introduction

1.1 Application for approval

1.1.1 In order that consideration may be given to approval of fibre reinforcements, the local Surveyors are to submit a report to Materials and NDE Department, giving the information listed in Sections 2 and 3 together with the results of approval tests carried out under their survey, or alternatively by an independent test house.

1.1.2 The following Data Forms are to be used in the report:

CMA/1R (Chopped strand mat reinforcements).

GRA/1R (Fibre rovings).

WRA/1R (Fibre woven rovings).

CGR/2 (Composite fibre reinforcements).

1.2 Scope

1.2.1 All glass fibre chopped strand mats, fibre rovings and composite reinforcements employed in constructions moulded under LR survey are to be approved for this purpose prior to use.

1.2.2 In this context a `composite reinforcement' refers to those materials in which woven rovings, unidirectional rovings or crossplied unidirectional rovings are backed by a chopped strand mat, which may be attached to the roving reinforcement by adhesively bonding, needling or other means.

1.3 Validity of approval

1.3.1 Initial approval, where granted, will be for a period of five years. Thereafter, approval may be extended for successive periods of five years, following re-testing and the re- submission of satisfactory property test data.

1.3.2 The approval will be limited to a nominated site of manufacture. Where the product is manufactured at other sites, these are to be approved separately.


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1.4 Withdrawal of approval

1.4.1 Approval is given on the assumption that production material, when examined, will exhibit similar test results to those submitted, allowing for normal batch to batch variation.

1.4.2 Approval is contingent on the adherence to the stated specification. Approval will be withdrawn if:

(a) The properties of the material are found to deviate significantly from those on which the approval was originally granted.

(b) The material proves to be intractable in use.

(c) The quality control procedures are not adhered to consistently.

(d) The manufacturer makes changes to the formulation, product name or reference number without informing LR.

2 Information required for approval

2.1 General

2.1.1 Product literature. The manufacturer is to submit their current trade literature referring to the technical details of the product, together with two samples approximately 300 mm x 300 mm of each grade of material for which approval is sought.

2.1.2 Quality control. The manufacturer is to operate established quality control procedures capable of detecting any variations from the properties submitted for approval. A brief description of the quality control methods and frequency of testing is to be submitted. Part 3 of each of the Data Forms is provided for this purpose These should be signed by the Quality Manager of the site of manufacture.

2.1.3 Variants. Where approval of a range of closely related products is sought, the Surveyor is to consult Materials and NDE Department on testing requirements. In such cases it may not be required that laminates be made and tested from each of the products in the range. However, Part 1 of the relevant Data Form must be completed for each product, and samples of each material submitted.


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2.2 Glass fibre chopped strand mat

2.2.1 The following information from the manufacturer's own data on the fibre and mat properties is to be recorded in Part 1 of Data Form CMA/1R.

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(a) Type of keying agent employed in the size, i.e. chrome complex, silane or other type.

(b) Type of binder employed in the mat construction.

(c) Filament alkali content expressed as per cent Na2O. (This is not to be greater than one percent for an approved reinforcement).

(d) Average filament diameter.

(e) Strand length. (This is to be nominal 50 mm with a minimum of 35 mm).

(f) Strand count.

(g) Binder content, expressed as percentage weight loss on ignition.

(h) Nominal mass per unit area of the mat.

(i) Percentage variation in mass per unit area.

(j) Moisture content.

(k) Density of the glass.

(l) Type of glass.

2.2.2 Part 3 of Data Form CMA/1R is also to be completed.

2.3 Fibre rovings

2.3.1 The following information from the manufacturer's own data on the fibre and roving properties is to be recorded in Part 1 of Data Form GRA/1R:

(a) Type of keying agent employed in the size, i.e. chrome complex, silane or other type.

(b) For glass, alkali content of the filament expressed as per cent Na2O. (This


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is not to be greater than one per cent for an approved reinforcement).

(c) Average filament diameter.

(d) Strand count.

(e) Nominal linear density (tex) of the roving.

(f) Size content.

(g) Moisture content.

(h) Density of the fibre material.

(i) Type of fibre material.

2.3.2 Part 3 of Data Form GRA/1R is also to be completed.

2.4 Fibre woven rovings

2.4.1 The following information from the manufacturer's own data on the fibre and woven roving properties is to be recorded in Part 1 of Data Form WRA/1R:

(a) For glass, alkali content of the filament expressed as per cent Na2O. (This is not to be greater than one per cent for an approved reinforcement).

(b) Average filament diameter.

(c) Residual size content.

(d) Type of keying agent employed in the size, i.e. chrome complex, silane or other type.

(e) Nominal linear density (tex) of the rovings in both the warp and weft directions.

(f) Type of weave employed.

(g) Number of roving ends per 100 mm in both the warp and weft directions. (h) Mass per unit area of the woven roving.

(j) Moisture content.

(j) Density of the fibre material.


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(k) Type of fibre material.

2.4.2 Part 3 of Data Form WRA/1R is also to be completed.

2.5 Plied stitched rovings

2.5.1 In addition to the requirements of 2.4, details of the constructional stitching are to be provided, including yarn, specific gravity (yarn), type, frequency and direction.

2.6 Composite fibre reinforcement

2.6.1 There are two stages to the submission of information.

2.6.2 Stage A. The following information from the manufacturer's own data on the fibre, roving and composite properties is to be recorded in Part 1 of Data Form CGR/2.

(a) Type of keying agent employed in both the roving and the mat, i.e. chrome complex, silane or other type.

(b) Type of binder employed in the mat construction.

(c) Type of weave employed in the roving.

(d) For glass, alkali content of the filament expressed as per cent Na2O. (This is to be less than one per cent for an approved reinforcement).

(e) Average filament diameters of both the roving and the mat.

(f) Residual size content of the roving.

(g) Binder content in the mat, expressed as percentage weight loss on ignition.

(h) Nominal linear density (tex) of the rovings in both the warp and weft directions.

(i) Number of roving ends per 100 mm in both the warp and weft directions.


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(j) Nominal mass per unit area of both the roving and the mat.

(k) Density of the fibre material.

(l) Moisture content of the composite as supplied.

(m) Means by which the mat and roving components are combined, i.e. soluble binder, stitching, etc.

(n) Type of fibre materials used in the mat and roving components.

Part 3 of Data Form CGR/2 is also to be completed and submitted at this stage.

2.6.3 Stage B. Following an examination of the initial data submitted under Stage A, Materials and NDE Department will confirm which tests will be required. The tests will, in general, be those described in 4.5, and the results are to be entered in Part 2 of Data Form CGR/2, and submitted for consideration. Where appropriate, Materials and NDE Department will indicate if any of the established tests may be omitted or alternatively request additional tests due to the nature of the particular reinforcement.

3 Approval test programme

3.1 General

3.1.1 Approval will be granted following a satisfactory examination of data from the tests detailed in the appropriate part of Section 4.

3.2 Testing

3.2.1

The tests are to be carried out by one of the following:

(a) LR’s own Materials Laboratory.

(b) An independent test house that has been accredited, by a nationally recognised body, for the tests undertaken with testing witnessed by an LR Surveyor.

(c) The manufacturer’s own test facility with testing witnessed by an LR Surveyor.

3.2.2 The test facility is to be staffed and equipped such that they are able to conduct


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the required tests in a competent manner.

3.2.3 A copy of the test report, inclusive of all load/extension curves, is to accompany the application for approval and the completed Data Form.

3.2.4

When testing is to be undertaken by LR’s own Materials Laboratory, the following quantities of material is to be submitted to the Laboratory together with the completed Data Form(s) and details of any reinforcement variants for which approval is sought:

Material Quantity required Glass fibre chopped strand mat 10m (minimum) of full width material Fibre roving 10kg (minimum) reel Fibre woven roving 10m (minimum) of full width material

Stitched parallel plied reinforcement 10m (minimum) of full width material

Composite fibre reinforcement 10m (minimum) of full width material

3.2.5 If a test panel, manufactured to LR’s requirements is to be submitted for test, the panel must be a minimum of one metre square and a thickness of 3 to 5 mm. The panel should be accompanied by the following details (in addition to the requirements in the Test Data Forms):

(a) Grade and quantity of accelerator used (if applicable).

(b) Grade and quantity of catalyst used.

(c) Post cure conditions.


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4 Approval tests

4.1 Glass fibre chopped strand mat - Laminate tests

4.1.1 A laminate containing a nominal 1800 g/m2 of chopped strand mat reinforcement and of nominal 30 per cent glass content is to be prepared using a room temperature curing polyester resin approved by LR. Full details of the construction are to be provided.

4.1.2 If intended for use under ambient conditions, the test laminate is to be cured for 24 hours at room temperature (18°C to 21°C) followed by a postcure of 16 hours at 40°C.

4.1.3 The laminate is to be to be tested, using ISO standard methods, as given in Section 5, and the following test data reported in Part 2 of Data Form CMA/1R:

(a) Glass content by weight of laminate.

(b) Flexural strength, flexural rigidity modulus, tensile strength, tensile secant modulus at 0,25 per cent and 0,5 per cent strain in the dry condition.

(c) Flexural strength, flexural rigidity modulus, tensile strength, tensile secant modulus after 28 days immersion in distilled water at 35 ±2°C, followed by cooling to room temperature whilst still immersed in water.

(d) Compressive strength.

(e) Compressive modulus.

(f) Water absorption at room temperature after seven days immersion.

4.1.4 Test results based on materials that have been subjected to more intensive cure conditions will not be approved by LR unless intended for use at elevated temperatures (see 4.1.2).

4.2 Fibre rovings - Laminate tests

4.2.1 The approval tests for a roving depend upon its intended use, either in resin/fibre spray- up equipment, or as a non-structural local reinforcement placed at the edges or in the corners of a laminate. In the latter case, approval will be by Statement of Acceptance.


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4.2.2 A roving for use with resin/fibre spray-up equipment will be approved following a satisfactory examination of data on the physical properties of the roving and those of a laminate produced using a resin/fibre depositor in conjunction with a polyester resin approved by LR. A roving approved for spray-up purposes will automatically receive approval for use as a local reinforcement.

4.2.3 Where approval of a roving as a local reinforcement only is sought, approval will be given following a satisfactory examination of data on the physical properties of the roving. Rovings approved for such purposes will in no circumstances be accepted by LR in spray-up applications in the absence of additional test data on a laminate produced by spray-up.

4.2.4 Where spray-up approval is sought, a laminate containing a nominal 1800 g/m2 of reinforcement and of 30 to 35 per cent glass content by weight is to be prepared from the roving using a fibre resin depositor and a polyester resin approved by LR. The cut fibre length is to be a nominal 50 mm. Full details of the construction are to be provided.

4.2.5 Cure/post cure conditions are as described in 4.1.2

4.2.6 The laminate is to be tested, using ISO standard methods, as given in Section 5 and the following test data reported in Part 2 of Data Form GRA/1R:

(a) Type of polyester resin employed.

(b) Resin/fibre depositor employed.

(c) Number of roving packages being used simultaneously during spray-up.

(d) Fibre content by weight of laminate.

(e) Flexural strength, flexural rigidity modulus, tensile strength, tensile secant modulus at 0,25 per cent and 0,50 per cent strain in the dry condition.

(f) Flexural strength and tensile secant modulus after 28 days immersion in distilled water at 35 ±2°C, followed by cooling to room temperature whilst still immersed in water.

(g) Compressive strength.

(h) Compressive modulus.

(i) Water absorption at room temperature after seven days immersion.


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4.2.7 Test results based on laminates that have been subjected to more intensive cure conditions will not be approved by LR. See 4.1.4.

4.3 Fibre woven rovings - Laminate tests

4.3.1 A laminate is to be prepared by hand lay-up employing a resin approved by LR and is to contain approximately 2800 g/m2 of reinforcement, giving a nominal fibre content of 45 to 50 per cent by weight for glass. The laminate plies are, in all cases, to be laid in a direction parallel to each other. Full details of the construction are to be provided.

4.3.2 The test laminate is to be cured as described in 4.1.2.

4.3.3 The laminate is to be tested, using ISO standard methods, as given in Section 5, and the following test data reported in Part 2 of Data Form WRA/1R:

(a) Total weight of reinforcement in the laminates.

(b) Flexural strength, flexural rigidity modulus, tensile strength, tensile secant modulus at 0,25 per cent and 0,5 per cent strain in the dry condition for both the warp and weft directions.

(c) Flexural strength in the warp direction after 28 days immersion in distilled water at 35 ±2°C, followed by cooling to room temperature whilst still immersed in water.

(d) Tensile secant modulus in the weft direction and after 28 days immersion in distilled water at 35 ±2°C, followed by cooling to room temperature whilst still immersed in water.

(e) Compressive strength in both warp and weft directions.

(f) Compressive modulus in both warp and weft directions.

(g) Inter-laminar shear strength.

(h) Water absorption at room temperature after seven days immersion.

(i) Fibre content by weight of laminate.

Note: For unidirectional reinforcements, tests are required only in the major strength direction


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4.3.4 Test results based on laminates that have been subjected to more intensive cure conditions will not be approved by LR See 4.1.4.

4.4 Stitched parallel plied reinforcement - Laminate tests

4.4.1 Test data is to be reported as described in 4.3.3, with test directions as shown in Table 14-2.4.1

Note: For unidirectional reinforcements, tests are required only in the major strength direction.

4.5 Composite fibre reinforcement - Laminate tests

4.5.1 After confirmation that the initial data provided is acceptable, a laminate is to be prepared by hand lay-up employing a resin approved by LR and is to contain approximately 2800 g/m2 of reinforcement, but in no case is to be of less than two plies. The laminate is to have a fibre content consistent with that which will normally be obtained during production (the manufacturer's upper and lower limits for fibre content in normal use are to be advised). The laminate plies are, in all cases, to be laid in a direction parallel to each other. Full details of the construction are to be provided.

4.5.2 The test laminate is to be cured as described in 4.1.2.

4.5.3 The laminate is to be tested, using ISO standard methods, as given in Section 5, and the following test data reported in Part 2 of Data Form CGR/2:

(a) Total weight of reinforcement in the laminates.

(b) Laminate thickness.

(c) Flexural strength, flexural rigidity modulus, tensile strength, tensile secant modulus at 0,25 per cent and 0,5 per cent strain in the dry condition for both the warp and weft directions.

(d) Flexural strength in the warp after 28 days immersion in distilled water at 35 ±2°C, followed by cooling to room temperature whilst still immersed in water.


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(e) Tensile secant modulus in the weft direction and after 28 days immersion in distilled water at 35 ±2°C, followed by cooling to room temperature whilst still immersed in water.

(f) Compressive strength in both warp and weft directions.

(g) Compressive modulus in both warp and weft directions.

(h) Water absorption at room temperature after seven days immersion.

(i) Fibre content by weight of laminate.

Note For unidirectional reinforcements, tests are required only in the major strength direction. Flexural tests are to be conducted with the roving face of the laminate in compression.

4.5.4 Test results based on laminates that have been subjected to more intensive cure conditions will not be approved by LR. See 4.1.1.

4.5.5 Stitched parallel plied composite reinforcements are to be tested according to the directional requirements of 4.4.

5 Standard test methods to be employed for approval of reinforcements

5.1 Introduction

5.1.1 The following information is provided for the guidance of manufacturers and independent test houses through whom data is established and submitted to LR, where approval of a reinforcement is sought for the construction of reinforced plastics craft under LR's survey.

5.1.2 Test data submitted for LR's consideration is to be determined in accordance with specific ISO standards employing specified test specimen types and testing conditions.

5.1.3 Tests conducted other than to the ISO Standards stated below, or employing test specimens, testing conditions (i.e. test speeds) differing from those stated will not be accepted unless the prior written agreement of LR has been given.


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5.2 Laminate preparation and cure/post cure condition

5.2.1 The laminate is to be prepared by hand lay-up using a conventional cold curing system. The resin is to be LR approved and is to contain less than two per cent filler/pigment.

5.2.2 For use under ambient conditions, the laminate is to be cured for 24 hours at room temperature (18°-21°C) followed by a postcure of 16 hours at 40°C. Test results based on materials that have been subjected to more intensive cure conditions will not be approved by LR unless intended for use at elevated temperatures (see 4.1.2).

5.3 Laminate testing

5.3.1 Table 14-2.5.1 gives the ISO test methods and speed of test

6 Reinforcement laminate minimum property values

6.1 General

6.1.1 The minimum property values of reinforced laminate when tested to the appropriate LR procedure is shown in Table 14-2.6.1.

6.1.2 Where measured properties are below the minimum values, the material may receive approval but in this case the certificate will be endorsed showing permitted design values at 90 per cent of the tested values.


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Table 14-2.4.1 Test directions Type of reinforcement Test direction

0°, 90° stitched 0° and 90°

± 45° parallel plied Triaxial

Quadriaxial

0°, 90°, +45°, -45°

Table 14-2.5.1 Tests on laminate specimens Test Standard

Tensile properties Flexural properties Compressive properties Interlaminar shear Water absorption Glass content

ISO 527-4 ISO 14125 ISO 604 ISO 14130 ISO 62 ISO 1172

Test speed = 2.mm/min Specimens Types 2 or 3

Test speed = Thickness

mm / min 2

Test speed = 1 mm/min

Method 1 (See Note 1)

NOTES 1. ISO 62 – where resins are intended for use under ambient conditions to avoid

additional post-curing, the requirement in ISO 62 for pre-drying the test specimen at 50 C is t o b e o m i

2. ISO 527-4 – tensile properties are to be measured using extensometry. 3. Tensile modulus values are to be determined using an extensometer which may be

removed for strain to failure.


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Table 14-2.6.1 Minimum property values of reinforced laminate

Material type Property Value

Chopped strand mat Tensile strength (N/mm2) Modulus of elasticity in tension (kN/mm2)

200Gc + 25

15Gc + 2,0

Bi-directional reinforcement Tensile strength (N/mm2) Modulus of elasticity in tension (kN/mm2)

400Gc – 10 30Gc – 0,5

Uni-directional reinforcement Tensile strength (N/mm2) Modulus of elasticity in tension (kN/mm2)

1800Gc2 – 1400Gc + 510

130Gc

2 – 114Gc + 39 All Flexural strength (N/mm2)

Modulus of elasticity in flexure (kN/mm2)

Compressive strength (N/mm2)

Compressive modulus (kN/mm2)

Interlaminar shear strength (N/mm2)

Water absorption (mg)

Glass content (% by weight)

502Gc2 + 106,8

33,4Gc2 + 2,2

150Gc + 72 40Gc – 6 22 – 13,5Gc (min 15) 70 (maximum) As measured (Note 4)

NOTES 1. After water immersion the values are to be a minimum of 75% of the above. 2. Where materials have reinforcement in more than two directions the requirement will be subject to

individual consideration dependent on the construction. 3. Gc = is the actual glass fraction of the laminate by weight. 4. Where non-glass or glass hybrid materials form a portion of the reinforcement, glass equivalent

content, by weight, is to be calculated.

APPENDIX A MQPS 14-2 CHOPPED STRAND GLASS MATDATA FORM CMA/1R

©Lloyds Register Group Limited. 2014

!"#$Mat reference number or grade: Manufacturer: Address:

Standards complied with:

Keying agent type: Binder type: Applications:

Part 1-FIBRE AND MAT PROPERTIES

PROPERTY NominalValue Tolerance Test Method

Filament alkali content (as Na2O) (%)

Average filament diameter (µµµµm)

Strand length (mm)

Strand count

Binder content (as % ignition loss)

Mass per unit area (g/mm2)

Variation in mass per unit area (%)

Moisture content (%)

Density of the glass (g/cm3)

Dimensions of standard rolls: Weight of standard rolls: Packaging details: Storage life: Recommended storage temperature:

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© Lloyd’s Register Group Limited. 2014

!"#$Part 2- TEST LAMINATE PROPERTIES

Tests to be conducted on a laminate containing a nominal 1800 g/m2 ofreinforcement with a 30-35% glass content using an approved resin. The laminateis to be cured initially for not less than 24 hours at room temperature (18°- 21°C)and postcured for 16 hours at 40°C . Laminates subjected to more intensivepostcuring schedules will not be considered.

One copy of the Test House report and load extension curves must accompanythis data summary form.

LAMINATE PREPARATION

Polyester resin employed:

Manufacturer:

Mat nominal weight:

Number of plies:

Laminate thickness (mm):

Actual weight of resin used (kg):

Actual weight of mat used (kg):

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!"#$LAMINATE TEST DATA

Property Unit Individual TestValues

MeanProperty

Value

Test MethodUsed

Laminate glass content %

Flexural strength (dry) N/mm2

*Flexural strength (wet) N/mm2

Flexural modulus (dry) kN/mm2

Tensile strength (dry) N/mm2

Tensile secant modulus (dry) at 0.25% strain at 0.5% strain

kN/mm2

*Tensile secant modulus (wet) kN/mm2

Compressive strength N/mm2

Compressive modulus kN/mm2

Water absorption at 7 days mg

*Test specimens immersed in distilled water at 35 ± 2°C for 28 days, cooled to roomtemperature in distilled water for 30 minutes, dried with a cloth and tested withinone hour.

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!"#$Part 3 QUALITY CONTROL SCHEDULE

List below the tests carried out for routine Quality Control purposes and the frequency ofthese tests.

Test Frequency

Signature ………………………………….(on behalf of manufacturer)

Position

Date

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APPENDIX B MQPS 14-2FIBRE ROVINGS DATA FORM GRA/1R


!"#$Product reference number or grade: Manufacturer: Address:


Keying agent type: Approvals sought For spray-up and local reinforcement

For local reinforcement

Part 1-ROVING PROPERTIES (where applicable)




Strand count

Roving yield (tex)

Size content (%)


Density of the fibre material (g/cm3)

Standard windings: Weight of standard package: Packaging details: Storage life Recommended storage temperature:

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!"#$Part 2- TEST LAMINATE PROPERTIES(Applicable only to spray-up roving approvals)

Tests to be conducted on a laminate containing a nominal 1800 g/m2 ofreinforcement and 30-35% glass content produced by a glass/resin depositorusing an approved resin. The laminate is to be cured initially for not less than 24hours at room temperature (18°- 21°C) and postcured for 16 hours at 40°C .Laminates subjected to more intensive postcuring schedules will not beconsidered.



Resin employed:

Manufacturer:

Resin fibre depositor employed: (Manufacturer and Model No.)

Number of roving packages in Simultaneous use during spray-up:

Sprayed fibre length (mm):

Reinforcement weight (deposited):


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Property Unit Individual TestValues

MeanProperty

Value

Test MethodUsed

Laminate fibre content %





Tensile secant modulus (dry) at 0.25% strain at 0.5% strain

kN/mm2





* Test specimens immersed in distilled water at 35 ± 2°C for 28 days, cooled toroom temperature in distilled water for 30 minutes, dried with a cloth and testedwithin one hour.

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Test Frequency


Position

Date

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APPENDIX C MQPS 14-2WOVEN ROVINGS DATA FORM WRA/1R




Keying agent type:

Part 1-FIBRE AND WOVEN ROVING PROPERTIES (where applicable)




Roving ends per 100 mm Warp:

Weft:

Linear density of rovings (tex) Warp:

Weft:

Residual size content (%)

Mass per unit area (g/m2)



Weave type: Standard roll width and length: Standard roll weight: Packaging details: Storage life: Recommended storage temperature:

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!"#$Part 2- TEST LAMINATE PROPERTIES

Tests to be conducted on a laminate containing a nominal 50% glass content and2800 g/m2 of reinforcement produced by the hand lay-up process, using anapproved resin. The laminate is to be cured initially for not less than 24 hours atroom temperature (18°- 21°C) and postcured for 16 hours at 40°C . Laminatessubjected to more intensive postcuring schedules will not be considered.

All reinforcements are to be parallel plied during laminate construction.



Resin employed:

Manufacturer:

Weight of resin used:

Weight of reinforcement used


Number of plies:

Note If the reinforcement has a specific ‘moulded’ surface (e.g. the surface of thelaminate to be on the outside of the hull), flexural tests must be conducted with thissurface in tension.

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Warp WeftProperty UnitIndividualTest Values

Mean IndividualTest Values

MeanTest

MethodUsed

Laminate fibre content %


Not Required




Tensile secant modulus (dry) at 0.25% strain

at 0.5% strain kN/mm2


Not Required




Interlaminar shear strength(dry)

%

* Test specimens immersed in distilled water at 35 ± 2°C for 28 days, cooled toroom temperature in distilled water for 30 minutes, dried with a cloth and testedwithin one hour.

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Test Frequency


Position

Date

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APPENDIX D MQPS 14-2COMPOSITE FIBRE REINFORCEMENTSDATA FORM CGR/2



Part 1-FIBRE AND COMPOSITE COMPONENT PROPERTIES

Method of bonding rovingand mat components: Where stitching is used to secure the mat please provide full detailsYarn type: Stitch: Direction: Count :

Keying agent on roving: Keying agent on mat: Mat binder type:

MAT ROVINGPROPERTY Mean

Value Tolerance MeanValue Tolerance

Test Methods



Roving ends per 100 mm Warp: Weft:

Linear density of rovings (tex) Warp:

Weft:

Residual size content of rovings(%)

Mass per unit area (g/m2)

Moisture content as supplied (%):


Roving weave type: Standard roll width and length: Standard roll weight: Packaging details: Storage life Recommended storage temperature:

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!"#$Part 2- TEST LAMINATE PROPERTIES(Applicable only to spray-up roving approvals)

Tests to be conducted on a laminate containing a nominal 2800 g/m2 ofreinforcement ,but consisting of not less than two plies, produced by the handlay-up process, using an approved resin. The laminate is to be cured initially fornot less than 24 hours at room temperature (18°- 21°C) and postcured for 16 hoursat 40°C . Laminates subjected to more intensive postcuring schedules will not beconsidered.

All reinforcements are to be parallel plied mat face downward during laminateconstruction.



Resin employed:

Manufacturer:

Weight of resin used:

Weight of reinforcement used:


Number of plies

Recommended range of fibre contentIn use for hand lay-up: % to %

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Warp WeftProperty Unit

IndividualTest Values

Mean IndividualTest Values

Mean

TestMethod

Used

Laminate glass content %

*Flexural strength (dry) N/mm2

*Flexural strength (wet**) N/mm2

*Flexural modulus (dry) kN/mm2


Tensile secant modulus (dry) at 0.25% strain

at 0.5% strain kN/mm2

Tensile secant modulus (wet**) kN/mm2




* Flexural tests to be conducted with roving face of the laminate in compression

** Test specimens immersed in distilled water at 35 ± 2°C for 28 days, cooled toroom temperature in distilled water for 30 minutes, dried with a cloth and testedwithin one hour.

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Test Frequency


Position

Date

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Comment on Text

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materials and qualification procedures for ships(m) means by which the mat and roving components are...

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