Gun roving overview

spray up process.

Spray-up is used to make large, complex parts such as boat hulls and bath tubs. Spray-up uses multi-end roving fed into a "gun" that is chopped into bundles of predetermined length. The bundles are sprayed into a resin stream and deposited onto a mold cavity that is gel-coated for a consistent, smooth surface finish. Once the resin cures, the part is removed from the mold. Spray-up is similar to and often combined with the hand lay-up process.

OC spray up roving:

In Owen Corning, 300 Gun Roving is developed for customers who require a basic gun roving requiring minimal Sales or Technical support. 300 Gun Roving is designed for use in a variety of spray-up operations in a wide range of end use applications in the marine, construction, consumer-recreation and transportation markets.

PPG spray up roving:

Hybon 6000 .

Any way, Everybody knows Vetrotex have been merged by OC. ( OC just release from chapter 11) some distributor said that they are creating more chance for different glass fiber vendors break into US and European composites market.

John's Manville

JM also have one type is spray up process.

MultiStar™ 819

MultiStar™ 819 is an assembled roving with a silane based sizing characterized by a good choppability, low fuzz, and uniform splitting during chopping. It is used as a reinforcement of unsaturated polyester resins using spray-up technology. Benefits:Good choppabilityUniform splitting during choppingVery low fuzzNon-static chargeUniform carpetFast wet-outFast wet-throughVery good shapeability

There is other two glass fiber vendors in Finland (ALSTROM)and Turkey(CAMELYA),

Japan ASAHI have been merged by OC,too. 300 gun roving

China. CPIC ( EC10 / EC 11/ EC 10C are gun roving code) have good gun roving.

JUSHI ( 148 /158 ) is good,too.

The price is up and up , the supply volume is shortage .

the key is R&D , and process control.

some chinese glass fiber vendors developing SPC( systematic process control) and SPD ( systematic process delivery and digital,i guess) to control the quality.

In instance, control the arrangement of

Tensile strength, Fluexual strength, Impact Strength, filament density, loss of ignition , filament diameter, etc.

other point i need to emphasis, packaging is important for all the chinese glass fiber vendors.

LM glasfibre accepted CPIC direct roving for weaving. ( mainly for Polyester and vinyl ester resin)

VESTAS accepted JUSHI multiaxial fabrics. ( JUSHI have advanced epoxy compatible roving and fabrics )

GAMESA IOLICA (china office) have long way to go.

I know it, because I am love glass fiber, composites became one part of my life.

i can feel the melting glass flowing, In chinese i called " liquid Jade" - Shui Yu

Plastics item

POP grade strips, EB 2071A , clear type, appply for profile strips-supermarket pricing label, with UV-resistant, backside can be colored. it is belong to PVC rigid pellet.

Soft PVC pellet also available for electronic cable line cover.

PMMA -Acrylic resin , for extrusion grade and injection grade , the currently vendor is plexglass.

A new year -2007

A new year coming, 2007.
Yesterday is Valentine's day, my x-girlfriend given me a mail with regarding. I was love her so much , even perhaps right now. when a man immerge in suffering of missing somebody, he will be used to it, i am , i was and i still...

For the prospect of 2007, i have three goals, one is enjoy myself-develope some hobits or learn one new language beside English. two is overcome myself. a business man is overcome himself. like Mr. Li jia cheng. and Mr.Warrent buffet . three is creating my fortune and my time.

For the PVC rigid pellets, EB 203 / 306 /3011 for blow molding.
IM 02D is apply for injection grade, can be make of electrical injunction boxes , replace PPO ( GE PLASTICS NORYL ) and PC ( GE PLASTICS LEXAN )
6062 is apply for pipe fitting , cal carbonate content 25% .
2071 & 2074 is apply for Co-extrusion process, can be make for plastic label on supermarket shelves. 2071 is transparent pellets as foreside label, 2074 is non-transparent pellets as backside label.

Other pellets for extrusion pipe , code is tony 2007 . ( my name with my time) =)

For my traditional advantage : composites and fiberglass . i only wish i can overcome this field . learn something i don't know it, but hard to find it . ha ha ha ...

the music l love right now, it is blue man group with some old chinese pop songs with pop songs.

In the next article, i will forward my friends article to my bloggee. ( blogger is the blog writter , bloggee is blog reader. )

Feb 18th , 2007 is chinese spring festival. everybody come back home and stick together. people talking , drinking and "body ZigZag" , the awesome days! i chose hangzhou city for my spring festival, because hangzhou is the most beautiful city to be and in china. will be bring some picture to your guys.

Happy spring festival!!!

PVC plastics

PVC is a kind of general utilizing plastics with comprehensive applications.

There is a lot of plastics suppliers and distributors creating fortune , PVC rigid pellets is one of these products. one famous experimental music group called blue man group. they have been using a lot of PVC music instructments. PVC pipes with diversity shapes. the PVC rigid pellets

can be apply for extrusion , injection and blow molding process etc.

Also, i have interested in engineering plastics , in china and asian countries, engineering plastics are booming...

Cold press molding process

Cold Press Molding
Cold press molding, a semi-open molding process, requires lighter duty, reinforced cast composite matched tools mounted into a press. Reinforcements, usually continuous filament mats (CFM), are placed into the tool and a highly filled polyester resin is poured onto them. The press is closed and the part is cured. The process requires lower pressures, 15 - 100 lb/in2, and temperatures averaging 130ºF (55ºC). Cycle times are in the range of 10 - 20 minutes. Other glass fiber fabrics, mats, veils and preforms are also used. Parts usually have a fair-to-poor surface, so uses are under-hood auto and truck components like fan shrouds, brackets and battery supports.

material including: resin, pigment, gelcoat, TiO2, Molder part, Fiberglass mat, woven roving, combomat, Surface veil.