Plastics industry jargon: 001-037

A

001 amino resin amino resin: A polymer obtained by condensation polymerization of an amino group-containing compound such as urea or melamine with an aldehyde or an aldehyde-generating substance.

002 amino plastic aminoplastics: plastic based on amino resin.

003 Blister bubble: During the molding of plastic, air bubbles or other gases cause air bubbles to form inside the product.

B

004 plate plate: Generally refers to a soft flat material with a thickness of 2 mm or more and a hard flat material with a thickness of 0.5 mm or more.

005. A split mold consisting of two or more components and a mold sleeve.

006 Translucency: The object can only transmit part of the visible light, but it cannot clearly observe the properties of other objects.

007 semi-flash mould: semi-flash mould: The mould in compression moulding that only allows limited material to overflow when closing the mould.

008 semirigid plastics: Determined according to GB1040-79 "Plastic Tensile Test Method", tensile elastic modulus 700 ~ 7000 kg force/cm2

About 70 to 700 108 (pascals) of plastic. The standard environment is selected in accordance with the requirements of GB 1039----79 General Principles of Test Methods for Mechanical Properties of Plastics.

009 Encapsulation: The use of painting, dipping, spraying, etc., to apply hot plastic or thermosetting resin to parts and to make all of their outer surfaces coated as a protective coating or insulating layer.

010 film: generally refers to flat and soft plastic products with a thickness of 0.25 mm or less.

011 Burst strength: The maximum pressure that a plastic container, pipe, film, etc. can be continuously applied by a liquid or air during a burst test.

012 Shave lines

Planing marks: A large area of ​​parallel scratches or sipe-like defects created on plastic sheet material during cutting operations.

013 hold time

(1) In the case of injection molding, it refers to a period of time after the plastic material is filled in the mold cavity and a predetermined pressure is applied to the plastic material in the mold.

(2) In compression molding, the time when the material is pressed into the cavity and the pressure rises to a predetermined value until the pressure is released.

014 Aniline formaldehyde resin aniline formaldehyde resim

An amino resin made from polycondensation of aniline and formaldehyde.

015 bulk polymerization (function) bulk polymerization, mass polymerization

In addition to the addition of a catalyst or initiator, the polymerization of the monomer (usually a liquid) is carried out without any other media (such as diluents or solvents).

016 styrene resin: A polymer obtained by polymerizing styrene or its derivatives or copolymerizing styrene with other unsaturated compounds.

017 Closed-cell foamed closed-cell foamed plastics

Most of the cells containing foam are not connected to each other.

018 Proportional limit: The maximum stress that a material can withstand without deviating from the direct relationship between stress and strain (Hooke's law).

019 Viscosity/density ratio, kinematic viscosity

The ratio of the absolute viscosity of the fluid to the density of the fluid is the specific viscosity.

ν=η/р

V——specific viscosity η——absolute viscosity р——viscosity of fluid (cm•g•sequence is 沲(stokes); meter•kg•sequence unit m2/sec(=104沲)

020 closing time closing time

The time from the start of mold closing to the complete closing of the mold during molding.

021 specific strength: The ratio of the strength (general tensile strength) of the material at the breaking point to its density, expressed in centimeters (m2/s2).

022 color discoloration

Changes in the color of plastic products due to light, heat, outdoor exposure, chemical agents, etc.

023 performance density apparent densit

The mass per unit volume of test material (including voids).

024 gauge gauge lehgth

The original length of the sample is marked within the measured range of strain or length change.

025 Surface treatment agent: In order to improve the adhesive properties, it is used as a material for the treatment of surfaces such as plastics, fillers, pigments, and adhesive carriers.

026 surface resistivity: The ratio of the potential gradient parallel to the current through the surface of the material to the current per unit width of the surface, expressed in ohms.

Note: If the current is stable, the surface resistivity is numerically equivalent to the surface resistance between the two electrodes on either side of the square material and is independent of the size of the square.

027瘪 foam (foam plastic) collapse (in foamed plastics): The foam in the manufacturing process due to the destruction of the cell structure of the local density of the defect.

028 C-stage C-stage: The final stage of certain thermosetting resins in cooked melons. In this stage, the resin neither dissolves nor melts.

029 acrylonitrile-butadiene-styrene resin acrylonitrile-butadiene-styrene resin: ABS resin acrylonitrile-butadiene and styrene or its derivatives terpolymer or acrylonitrile-butadiene copolymer and butadiene Blends of diene-styrene copolymers.

030 Acrylonitrile-butadiene-styrene plastics acrylonitrile-butadiene-styrene plastics: ABS plastics: plastics based on acrylonitrile-butadiene-styrene resin.

031 Acrylic plastic acrylic plastics

Acrylic based plastic.

032 acrylic resin:

Polymers made by polymerizing acrylic acid or acrylic acid monomers as monomers or copolymerizing them with other unsaturated compounds.

033 propylene resin: A product obtained by copolymerizing propylene or propylene and copolymerizing with one or more other unsaturated compounds.

034 Poisson's ratio: The absolute value of the ratio of the transverse strain to the corresponding longitudinal strain caused by uniformly distributed longitudinal stresses within the proportional limit of the material.

Note: When the proportional limit is exceeded, the Poisson's ratio changes with stress and is actually not Poisson's ratio. If the Poisson's ratio is recorded at this time, the stress measurement value should be indicated. For anisotropic materials, Poisson's ratio varies with the direction of applied stress.

035 ripple waviness:

There are wavy irregularities on the surface of plastic products.

036 unsaturated polyester unsaturated polyester

Polyester containing unsaturated bonds in the main chain.

037 does not overflow mold positive mould

A mold that does not overflow from the molding compound in compression molding.