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Internal Mould Release Agents

Loss of torque against time has been well documented with plastic caps on plastic bottles. This does not necessarily mean that the closure becomes ineffective, but there are occasions when a low torque only needs the vibration effects of transportation to become an unsatisfactory (loose/leaking) closure. Certain tamper-evident/resistant features such as sealed diaphragms and ratchet-type closure systems are likely to overcome such problems. Having the right combination of plastics may also eliminate or reduce this loss of torque. However, there is the converse where the use of the incorrect combination of plastics, or plastics with undesirable constituents such as lubricants, mould release agents, internal release agents, may actually exacerbate the loss of closure torque. This loss may be associated with thread forms, area of thread contacts, cold flow or creep of plastics involved, lubricants, etc. [Pg.323]

Migration of additives such as plasticizers, internal mould release agents... Painting defects can appear a long time after painting. [Pg.760]

Note SMCs are compounded with internal release agents, thus eliminating the need to apply external mould release agents between every cycle. [Pg.165]

Special features Do not use silicone based mould release agents with PSU. Post cure of the component is recommended to reduce the internal stresses and improve the mechanical properties up to 5 min. in oil or glycerine, up to 5 hours in air at approx. 165 °C. [Pg.91]

Whereas bis(stearoyl)ethylenediamine (EBS), generally known as amide wax, shows an unusually high melting point of 140°C and has a good balance of internal and external lubricating properties for PVC, the fatty acid monoamides, more particularly oleamide, stearylamide, and erucamide show a pronounced external effect. They are more particularly used as lubricants, mould release and antiblocking agents in polyolefins. [Pg.135]

Various technologies have been applied to minimise the required downtime, but so far a valid solution has not been found. The adhesive force between polyurethane and metal (either aluminum or steel) requires a release agent to be sprayed onto the moulds every single cycle (or every few cycles) to enable easy removal of the part. In addition, various internal mould release technologies are available, but they do not apply to all formulations. [Pg.131]

P(5) The use of internal release agents in the moulding material shall be avoided or minimised. When such additives are used the level of the adhesion shall be verified by testing. [Pg.206]

The moulding methods discussed typically require the use of internal release agents. These agents weaken the adhesion and therefore lower the load-bearing capacity of the joint. The use of these agents should be minimised, but can seldom be entirely avoided. [Pg.493]

Internal release agents improve the physical properties of the material and enable crosslinking with the resin during curing, the balance of internal release agent solvent is emitted as vapour, creating the release interface between the part and the mould. [Pg.25]

Antistatic additives can be classified by application method, as internal and external, and by chemistry, as anionic, cationic, and non-ionic. Internal agents are normally compounded at 0.1-3.0% by weight and have a slight compatibility with the polymer, but the molecule has a hydrophilic head forcing it to migrate to the surface and attract moisture from the environment, which increases the surface conductivity. These are easy to use and have low addition rates, often also providing other benefits such as improved processability and mould release. [Pg.143]


See other pages where Internal Mould Release Agents is mentioned: [Pg.432]    [Pg.433]    [Pg.434]    [Pg.432]    [Pg.433]    [Pg.434]    [Pg.784]    [Pg.169]    [Pg.57]    [Pg.203]    [Pg.287]    [Pg.60]    [Pg.60]    [Pg.10]    [Pg.41]    [Pg.350]    [Pg.24]    [Pg.24]    [Pg.74]    [Pg.269]    [Pg.269]    [Pg.51]    [Pg.166]    [Pg.73]    [Pg.26]    [Pg.128]    [Pg.142]    [Pg.826]    [Pg.826]    [Pg.9]    [Pg.15]    [Pg.209]    [Pg.78]    [Pg.287]    [Pg.264]    [Pg.25]    [Pg.214]    [Pg.826]    [Pg.559]    [Pg.159]    [Pg.165]   
See also in sourсe #XX -- [ Pg.269 ]




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INTERNAL MOULD RELEASE

Internal and External Mould Release Agents

MOULD RELEASE AGENT

Mould release

Release agents

Release internal

Releasing agent

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