Caprolactam (CPL)

CPL is made by reacting cyclohexane, ammonia and sulfur and is the raw material for the production of Nylon 6 polymer. Nylon 6 is a synthetic resin that, because of its strength, flexibility and softness, has a range of end uses, including for sportswear, underclothes and engineering plastics.

Clean Industry Certification

Certification granted by the Mexican Environmental Protection Agency (PROFEPA) to companies that comply with environmental legislation.

CO2 Emissions

Unit to measure the carbon dioxide produced by the burning of solid, liquid and gaseous fuels, including natural gas.

Comprehensive Responsibility Administrative System (Mexican National Association of the Chemical Industry, ANIQ)

Certification given to companies that comply with the six comprehensive responsibility requirements established by the ANIQ, covering Process safety, Health and safety in the workplace, Product safety, Transportation and distribution, Prevention and control of environmental pollution and Community protection.


Compound produced by the hydrogenation of benzene and used in caprolactam production.

Ethylene Oxide

Compound produced from ethylene and used as an intermediate in the production of MEG and other chemicals.

Expandable Polystyrene (EPS)

Light, rigid, cellular plastic, product of the polymerization of styrene monomer. EPS is a versatile material because of its properties as an impact reducer and thermal insulator, and customized molding capacity. These properties, combined with the ease with which it can be processed, make EPS a popular packaging for impact-sensitive items and for protecting perishables. It is also widely used in construction systems, to lighten floor and roof structures, and as an insulator.


Alpek-owned technology for producing PTA and PET from paraxylene (PX) and monoethylene glycol (MEG), offering significant cost savings and fewer intermediate steps in the production process.

Investment Grade

Rating given to a company as a result of an evaluation made by credit-risk rating agencies such as Fitch Ratings, Standard & Poor’s and Moody’s.

ISO 9001 Certification

Certification issued by rating agencies to those companies that operate with proven procedures for assuring the quality of their products, in accordance with the standard defined by the International Organization for Standardization (ISO).

ISO 14001 Certification

Internationally accepted standard for establishing an efficient Environmental Management System (EMS). The standard is designed to support companies’ profitability and at the same time minimize environmental impact.


Unit of power, equal to 1 million watts.

Monoethylene Glycol (MEG)

Raw material with diverse industrial uses, especially for producing polyester (PET and fiber), antifreeze, refrigerants and solvents.

Paraxylene (PX)

Hydrocarbon in the xylene family used to produce PTA. It is also a component of gasoline.

Polyester Chain

Alpek business that comprises all the companies involved in polyester production, from the raw material (PTA) to the production of PET and fibers.

Polyethylene Terephthalate (PET)

Material widely used in the manufacture of bottles and other containers for liquids, food and personal hygiene, household and healthcare products. PET flakes and films are used to produce caps, trays and recipients. Because of its transparency, strength, durability and high protection barriers, PET presents no known health risks, is light and recyclable, and has a wide range of applications in reusable, temperature-sensitive packaging. PET has replaced glass and aluminum, as well as other plastics such as PVC and polyethylene, for making containers.

Polypropylene (PP)

Thermoplastic polymer, produced from the polymerization of propylene monomer. Its properties include a low specific gravity, great rigidity, resistance to relatively high temperatures and good resistance to chemicals and fatigue. PP has diverse applications, including for packaging, textiles, recyclable plastic parts and different kinds of containers, auto-parts and polymer (plastic) banknotes.

Polyurethanes (PURs)

Rigid, flexible or elastic, durable materials that are produced by the reaction of a polyol with an isocyanate. They are very versatile, offering the elasticity of rubber, combined with the hardness and durability of a metal. PURs may be hard like fiberglass, spongy like upholstery foam, protective like varnish, elastic like tire rubber or sticky like glue.


Unsaturated, 3-carbon hydrocarbon, co-product of the cracking process at petrochemical complexes and a by-product at oil refineries. It is used in the petrochemical industry to produce PP, propylene oxide, cumene, isopropanol, acrylic acid and acrylnitrile. It is also converted into a gasoline component by alkylation with butanes or pentanes.

Propylene Oxide

Compound produced from propylene and used to manufacture commercial and industrial products, including polyols, glycols and glycoethers.

Purified Terephthalic Acid (PTA)

Aromatic dicarboxylic acid, the main raw material in polyester production. PTA is produced by the oxidation of paraxylene. It is used to manufacture PET, which is then used to make bottles for water, soft drinks and other beverages, containers and other packaging, and polyester fiber for rugs, clothing, furniture and industrial applications, as well as other consumer products.

Self-regulation of Health and Safety in the Workplace, Level 4 Certification

Program implemented by the Mexican Ministry of Work and Social Welfare to verify that companies have implemented administrative systems that promote safe, hygienic work centers.

Single Step®

One-step technology for the production of EPS, where the EPS pearls are impregnated with a pre-expanded agent during the polymerization process.


LyondellBasell-owned technology which is the world’s most common way of producing polypropylene.


LyondellBasell’s most recent technology, which offers great flexibility in polypropylene production and is used to make a wide range of products.

Styrene Monomer

Unsaturated hydrocarbon used to make a variety of plastics, synthetic rubber, protective coatings and resins. It is the main raw material in EPS production and also used as a solvent and chemical intermediate.


Unit of power in the International System of Units (SI).