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    The company is equipped with advanced twin screw production lines, this powerful, fully digitally controlled twin screw production line can handle a wide range of polymers. Use it to shear strength, mixing plasticizing effect of good features to ensure that the production of high-performance materials and stability.

    Modified polypropylene series

    Material type

    Main application


    Materialrequirement characteristics


    Glass

    fiberreinforced

    PP

    motorcycle trunk


    All materials areconsigned to Pusheng Testing Co., Ltd. to be tested, which meet

    therequirements of the automobile and home

    appliances.


    PP+EPDM-T20

    Seamless safety airbag instrument

    panel

    PP+EPDM-T20

    Seamless safety airbag instrument

    panel

    KT8804


    Pedal support


    PB10


    Bumper


    PZ06


    Bumper bracket


    PB11


    Bumper


    PPY Series

    Car dashboard, doortrim panel,

    column, tool box cover, side panel,

    sill, steering post etc.

    PPB Series

    Car bumper

    PP+EPDM-T20


    Mini car dashboard,column, door


    PP-T20


    Mini car column, dooretc


    PB51


    Mini car bumper


    PP-LZ


    Mini car wheel casing


    GPB10201


    Mini car apronboard


    FCTN


    Mini car scuff


    PP-T40

    Commercial vehicle foglamp hole

    cover, upper mounting plate

    PY5


    Truck dashboard, door,glove box etc


    PY48


    Truck bumper,grill, fender etc


    PPF Series

    Light truck dashboard, dooret

    PP-X Series

    Light truck bumper

    PP-K Series

    Automobile air filter

    The long glass

    fiberreinforced

    PP

    All kinds of militarypacking box and

    other special container products,

    bumper bracket, instrument panel

    frame and so on can meet

    thelarge-scale terminal users

    requirements.


    Plus the highhardness, light weight,

    anti-corrosion, low cost and excellent

    workability canadapt to products with various

    complicated structures, making it become the optimalchoice of the substitute metal.




    Product uses: Usedin plastic part material for vehicle, such as the automotive interior andexterior parts. Application area: Apply in automotive parts. Key technology:According to the technical requirements of the auto plastic parts, we choosethe co polypropylene and add certain amount of fine talc powder with activatingtreatment. Owing to its layered structure and good nucleation property, it endowshigh hardness and strength to the products and improves the thermal deformationtemperature and dimensional stability, and also greatly improves the bendingstrength and flexural modulus. In order to improve the product performance inimpact-resistance and resistance to cracking, we choose ethylene-vinyl acetatecopolymer and thermoplastic elastomer to produce the PP modified plastics withexcellent performance indexes by high-speed kneading blend and double screwextrusion granulation. The technical parameters:



    Test items

    Test results


    Tensile strength,sample size: type 1A


    Test speed:50mm/min

    21


    Izod impactstrength (notched)

    kJ/㎡sample size:(80×10×4)mm

    Pendulum size:3.46V-2.75J

    Notch type: TypeA


    20.5


    Bending strength

    MPa sample size:(80×10×4)mm

    Test speed:2mm/min

    25.9


    Flexural modulus

    MPa sample size:(80×10×4)mm

    Test speed:2mm/min

    1610

    Load deformationtemperature, ℃ sample size:(80×10×4)mm

    Load:0.45

    102


    Flow rate of meltquality

    g/10min Load:2.16kg

    Temperature:230℃

    18

    Injection molding analysis


    Process and

    equipment

    mold

    material

    Weld line

    1. Injection

    pressure(speed) is too low or too high 2. Backpressure

    setting is

    inappropriate

    3. Feed-pipe

    temperature is too

    low

    1. Mold temperature is too low

    2. Gate orrunner is too small; the sprue runner is too long

    3. Bad exhaust

    1.Liquidity is notgood

    2. There exists foreign

    substance in materials

    Craze

    1. Barrel

    temperatureis too

    high

    2. Screw speed is

    too fast

    3. Nozzle is too

    small, too hot

    orobstructed

    4. Glue quantity

    exceeds 80% of

    the machine

    volume

    5. There’s gas

    orwater vapor in the melt adhesives

    6. Pure anticipate

    is not thorough

    1. Gate is too small

    2. Gate or runner is obstructed

    3. There are minor cracks on the mold surface

    1. Material is notfully dry

    2. Material contains foreign

    body

    3. Material is decomposed

    underhigh temperature

    Flashing

    1.Injection

    pressure(speed) is too high

    2. Melt adhesives

    stay in feed-pipe

    too long

    3. Moldingcycle is

    too long

    4. Lock die is

    insufficient

    5. Material

    temperature is

    toohigh

    1. Poor contact ofthe joint face

    2. Mold strength is not enough

    3. Bad exhaust

    4. sprue runner istoo long

    1. Fluidity is toogood

    2. Too much lubricant

    Sink

    1. Barrel or

    moldtemperature is too high

    2. The injection

    pressure and speed is too low, and

    thecycle is too

    short

    3. Lack of holding

    pressure (time)

    4. Bad cooling timesetting

    5. Check valve is

    undesirable

    1. Gate or runner is too small

    2. Theselection of gate position or type is not good

    3. Gate condensation is tooearly 4. Rib is too thick

    5. The flow is unbalanced


    1. Materialmobility and

    shrinkage are not desirable

    2. Feed back consumption is

    too big


    Insufficient

    filling

    1. Melt adhesivesamount is

    insufficient

    2. Barrel

    temperature is too

    low

    3. Back

    pressuresetting is

    not good

    4. Injection

    pressure (speed) is insufficient

    5. Injectiontime is

    too short

    6. Check valve

    clearance is big

    7. Nozzle is

    blocked

    1. Mold temperatureis too low

    2. Inappropriate selection of the

    gate type or position

    3. Badexhaust of the mold

    4. Mold runner (gate) is too small 5. Mold cavitydistribution is

    unbalanced

    1. Material fluidityitself is not

    good

    2. Poor material drying

    Flow mark

    1. Barrel

    temperatureis too

    low

    2. Injection

    pressure is too low 3. Lack of holding

    pressure (time)

    4. Cycle time is

    inappropriate

    5. Melt adhesives

    stay in feed-pipe

    too long

    1. Mold temperatureis too low

    2. Gate or runner is too small

    3. Bad exhaust  

    1. Material mobilityis not

    desirable

    2. Lubricant is inappropriate

    3. The volatile matter is

    toomuch

    Bubbles

    4. The

    injectionspeed is

    too high

    5. Molding filling is not enough

    6. Temperature in

    everysection of the feeding-pipe setting is not good

    1. Mold temperaturein places of

    thick wall (stiffening rib) is too

    high

    2. Gate or runner is notgood

    3. The selection of gate type or

    position is not good

    4. Gate condensationis too early 5. Mold temperature is too low

    6. Bad exhaust


    1. Materialmobility and

    shrinkage are not desirable

    2. Feed back consumption is

    too much

    3. Raw material is not fully

    dried


    Surface gloss  

    1. Barrel

    temperatureis too

    low

    2. The injection

    pressure is not

    enough

    3. Temperature of

    injectionnozzle is

    low

    4. Melt adhesives

    in feed-pipe is too

    long

    5. Molding cycle is inappropriate

    1. Mold polish is poor

    2. Gate or runner istoo small

    3. Gate type or position is

    inappropriate

    4. Bad exhaust

    5. There’sforeign body on the

    mold surface


    1. Material isnot fully dried

    2. Fluidity function is

    inappropriate

    3. The polish of materialitself is poor



    Bubbles

    Size

    difference  


    1. Material supply

    isunstable

    2. The screw

    rotation speed is

    unstable

    3. Temperature is

    out ofcontrol, the

    back pressure is

    unstable

    4. Screw reset is

    unstable

    5. Themolding

    cycle is unstable  

    1. Mold strength andrigidity are

    not enough

    2. A multi-cavity is used which is not good

    3. The topout system, feed

    system and cooling system

    setting are not reasonable  


    1. Materialdryness is not good with uneven particles

    2. The contraction percentage of rawmaterial is too big

    3. There exists batch

    difference in material viscosity



    自定內容
    NINGBO LONG KANG PLASTICS TECHNOLOGY CO., LTD 

    Address: No.201, Dongzhao Road,Tang Jia DianIndustrialPark Zone, Da Xu Zhen, Xiangshan, Zhejiang  
    TEL:0574-65622818  
    FAX:0574-65622958 
    MOB:13486663666  
    P.C:315706  
    Email:loubo@nbhl.net
    自定內容
    自定內容

    Copyright?Copyright?NINGBO LONG KANG PLASTICS TECHNOLOGY CO., LTD.All Rights Reserved

    Address: No.201, Dongzhao Road, Tang Jia Dian IndustrialPark Zone, Da Xu Zhen, Xiangshan, Zhejiang TEL:0574-65622818 65623111 FAX:0574-65622958

    Email:loubo@nbhl.net Zhe ICP recordNo.05037379; Zhe ICP recordNo.05037379

    技術支持:浙江七米

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