Your specialist for PUR recycling, blending, storing

The company H&S Anlagentechnik develops equipment and processing technologies for the efficient, flexible, reliable and environmentally friendly storage, metering, mixing and formulation of polyurethanes as well as equipment for the chemical recycling of polyurethane residues and generating polyester polyol based on PET and PA. One of our main advantages is the combination of chemical and technical production expertise. We have enjoyed a reputation as a high-performing and reliable partner for the polyurethane manufacturing industry for in excess of more than 25 years. We are specialized in the...

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recycling, blending, storing The demands made on companies are growing. Globalising markets, increasing competition, more discerning consumers and changing legal regulations all require innovative solutions and a particular performance capacity. This is why we are developing the opportunities to facilitate efficient production, a high degree of flexibility and speed, sustainable use of natural resources and high quality product manufacture. Our reactors for the recycling of polyurethanes (rigid and soft foams) as well as generating polyester polyols based on PET and PA bring a significant reduction...

Reactors H&S Anlagentechnik has developed an innovative technology and reactor installations for the chemical conversion of flexible and rigid polyurethane foam residues into polyol. The technologies enable to produce high-quality recovered polyols on a suitable production scale. Polyurethane foam manufacturers of both rigid or flexible types are showing a lot of interest in recycling technology. For flexible foam, this is because the methods previously used, such as rebound foam for carpet underlay and sports mats, are no longer efficient. Prices for flexible foam scrap has being decreased permanently....

Recycling reactors for flexible PU foam residues Technology H&S technology for flexible PU foam recycling is based on optimized acidolysis method where PU residues are being dissolved in a mixture of carboxylic acids and basic polyol. In comparison to previous conversion methods, polyols generated by H&S technology have good reactivity and do not contain primary aromatic amines (methylene and toluene diamine) which are hazardous and not acceptable in bedding and upholstery foams. Process sequence and duration Raw materials required for the process Example recipe Raw Materials PU foam industrial...

Recovered polyol can substitute All parameters like compression set, hardness, resilience, support factor, tensile strength and elongation at break are in the range of the control samples. without any influence on the physical and mechanical properties of the PU foam. Properties of the conventional PU foam produced with 20% recovered polyol on a continuous slabstock line (example) Master sample (foam without recovered polyol) Foam with 20% recovered polyol Master sample (foam without recovered polyol) Foam with 20% recovered polyol Support factor The costs to manufacture recovered polyol are...

Recycling reactors for rigid PU foam residues Technology H&S technology for rigid PU foam recycling is based on the glycolysis method where PU residues are being dissolved in a mixture of glycol and catalysts. The highlight of H&S method is that in comparison to previously known glycolysis technologies recovered polyols do not contain hazardous primary aromatic amines which is being achieved through a deamination phase. Process sequence and duration Raw materials required for the process • PU/PIR residues Grind residues from rigid PU/PIR foam production (insulating panels, shells, blocks etc.)....

The manufacturing costs of the recycled polyol are approximately 30% lower than the market price of the original polyol. The physical and mechanical properties of the PU/PIR foam produced with recovered polyol are comparable with reference samples manufactured without recycled polyol. Master sample (original PU foam) PU foam with recycled polyol Percentage of the recycled polyol used (%) Counter rise strength (kg/m3) Lambda coefficient Isocyanate index Physical and mechanical properties of the rigid PU foam in comparison to original foam produced on a continuous lamination line (example) Reactor...

Polyester polyol reactors (PET/PA) Polyol synthesis technology Raw materials required for the processes H&S technology for generating aromatic polyester polyols (APP) from polyethylene terephthalate (PET) as well as phthalic acid anhydride (PA) is based on the glycolysis method. • Polyethylene terephthalate (PET) - flakes from PET bottles - preforms out of specification - dust and granulate (preforms production waste) - fibers Process sequence and duration (polyol generating based on PET) • Phthalic acid anhydride (PA) is an organic compound. It is a colorless solid. PA is widely used for the large-scale...

PET and PA polyols properties PET based polyols are aromatic polyester polyol for application in rigid PU foam. PA based polyols are aromatic polyester polyol for application in rigid PU foam. Hydroxyl number Acid number Acid number Aromatic content Aromatic content viscous transparent liquid from colorless to light-brown color. viscous transparent liquid from colorless to light-brown color. Example recipe for generating PET polyol Example recipe for generating PA polyol Adipic acid There can be used 3 functional glycols, natural oils and high-molecular acids. Adipatic polyols Product applications...

Prepolymer reactors Generating prepolymers is a complex task which requires very precise control of the process conditions and parameters like temperature, pressure, agitation etc. Most of the raw materials which are necessary for producing prepolymers are sensitive and need special pre-treatment before being processed like melting, heating, cold storing, special way of dosing etc. H&S offers comprehensive reactor systems including all necessary equipment for storage and pre-treatment of the raw materials, controlling devices and filling stations for packaging of the ready prepolymers in tanks,...