風力發電葉片材料及製程

清華大學化工系教授馬振基博士

Processes ─ cont’d

Filament Winding

Processes ─ cont’d

Dry Lay-up bafore infusion

Processes ─ cont’d

Infusion (in process)

To reinforce our commitment and dedication to the wind turbine industry, the composites adhesives and resins systems have been consolidated into the Structural Composites business unit to provide a total technical solution.

We are now offering the added value of combined application expertise, understanding of the whole manufacturing process and development services, to meet the most demanding requirements of our customers.

Structural composites : A solution provider In the fastest growing energy supply

Inner (root) section

Structural composites in wind turbine industry applications

Manufacture and assembly of

main structural composite parts Shells Girders Shear webs/stiffeners Spars Root section

Spar

Shear web

Solid laminate

Assembly bondlineSandwich panel

Mould preparation and resin application according to the

used processAdhesive applica

tionBlade demouldin

g

Overall blade manufacturing process

Process time

Te

mp

°C

RESINS:1. PROCESSES Processes comparison

2. WET LAY UP PROCESS Process Systems and advantages New development

3. RESIN INFUSION Process Systems and advantages New development

4. PREPREG Process Systems and advantages New development

5. RESIN SELECTION GUIDE

ADHESIVES:6. BONDING Process Quality of bonded joint Adhesive selection Blade assembly adhesives

systems New development Bonding systems chemistry in

comparison

7. CONCLUSION

Structural composites Resins & adhesives

3 different processes

WET LAY-UP

Mould preparation

Mixing epoxy system

Fabrics impregnation and

wet laminate build-up

Curing

Demoulding & finishing

RESIN INFUSION

PREPREG

Build-up of dry reinforcement

for Vartm processing

Mixing epoxy system

Infusion under vacuum

Prepreg laying & compaction

Vacuum bagging

Vacuum bagging

Principle of wet lay-up process

Easiest way to produce composite parts. With the use of vacuum bagging technology the laminate quality is improved.

Features

Easy to teach

Low tooling cost

Wet lay-up system:

Araldite® LY 3505 / Hardener XB 3403 / XB 3404-1 / Aradur® 3405

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Pot life (100g 23°C) 600 / 720 minPot life (100g 23°C) 80 / 100 minPot life (100g 23°C) 26 / 36 minPot life (100g 23°C) 260 / 300 minPot life (100g 23°C) 100 / 130 min

LY 3505/XB 3403 (100:35)

LY 3505/XB 3404-1 (100:35)

LY 3505/XB 3403/ Aradur® 3405 (100:17.5:17.5)

LY 3505/ Aradur® 3405 (100:35)

LY 3505/XB 3403/XB 3404-1 (100:17.5:17.5)

Wet lay-up: New systems in development

Low viscosity and non aggressive system with:

• Long pot life hardener

• Fast hardener

Principle of resin infusion process (Vartm)

Process to produce parts with dry fabrics impregnated under pressure and heat using a reactive liquid resin. Avoids waste of impregnated fabrics.

Features High resin mechanical properties (due

to elevated temperature cure)

Good health and safety and clean lay-up

Araldite® LY 1564 / Aradur® 3486 / Aradur® 3487

Resin infusion system

Pot life (100g 23°C) 560 / 620 minPot life (100g 23°C) 130 / 160 minPot life (100g 23°C) 380 / 430 min

LY 1564/ Aradur® 3486 (100:34)

LY 1564/ Aradur® 3486/ Aradur® 3487 (100:17:17)

LY 1564/ Aradur® 3487 (100:34)

Resin infusion: New systems in development

System with :

• Long pot life

• Fast cure

Principle of prepreg process

Production of high quality parts in a press or autoclave supported by heat and vacuum.

Features

Well defined resin content

Clean handling

Excellent fibre wet out

Logistic

Prepreg: New systems in development

Hot melt system with long shelf life and low exotherm

• Cure at 85°C 4 - 6 h

• Fast cure up to 120°C 1 - 2 h

Preparation of parts

DemouldingCuring

Adhesive mixing & dispensing

Bonding process

Positionning of parts

According to assembly sequence

Finishingoperations

Completedblade

Closing mould with upper part shell

and compressing

Bonding process

MIXING AND APPLYING ADHESIVE ON UNDER PART IN THE MOULD

APPLYING ADHESIVE ONTO THE BONDED AREAS & ASSEMBLING ALL PARTS (SPAR, SHEAR WEB, …)

CLOSING MOULD, COMPRESSING & CURING

DEMOULDING & FINISHING

Blade assemblyNew adhesives in development

New adhesives generation

Toughened system

65-70°C post cured

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General committment

• Technical support– Selection of matrix – Selection of adhesive– Testing and verification– Process trials and application

support– General problem solving

• Training/seminars– Composites, matrix and

processes– Structural bonding

• Chemistry, formulations, materials and composite knowhow

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