1. Seat center distance 580±5mm, seat height 450±10mm, seat cushion opened to the back maximum 730±10mm, chair height 1050±10mm, height from ground to armrest surface 640±5mm.

2. ▲The overall seat exceeds the GB/T35607-2017 "Green Product Evaluation Furniture" standard testing content including but not limited to: seat and backrest durability ≥120,000 cycles, armrest durability ≥60,000 cycles; formaldehyde emission ≤0.028 mg/m³, benzene ≤0.002 mg/m³, toluene ≤0.07 mg/m³, xylene ≤0.08 mg/m³, total volatile organic compounds (TVOC) ≤0.28 mg/m³; no detection of 8 harmful elements in furniture coating (lead Pb, cadmium Cd, chromium Cr, mercury Hg, antimony Sb, barium Ba, selenium Se, arsenic As); no pentachlorophenol detected in accessible solid wood parts; no decomposable aromatic amine dyes detected; pentachlorophenol (PCP) in textiles <0.05 mg/kg.

3. ▲The seat outer panel uses "Tubaobao" high-quality plywood, thickness 15mm, formed in one step with adhesive and high-frequency hot press machine for seat and back outer panels, finished with high-quality PU environmentally friendly polyester paint, exceeding GB 18583-2008 "Indoor Decoration and Renovation Materials Adhesive Harmful Substance Limits Table 1 Solvent-based Adhesive Harmful Substance Limits", GB 33372-2020 "Adhesive Volatile Organic Compound Limits", HJ 2541-2016 "Environmental Label Product Technical Requirements Adhesive", HJ 571-2010 "Environmental Label Product Certification Technical Requirements for Artificial Boards and Products", GB/T 9846-2015 "General Plywood", GB 18580-2017 "Indoor Decoration and Renovation Materials Formaldehyde Emission Limits for Artificial Boards and Products" standards, testing content including but not limited to:

a. Plywood: formaldehyde emission ≤0.05 mg/m³;

b. Plywood: total volatile organic compounds (TVOC) ≤0.50 mg/m²·h;

c. Adhesive: free formaldehyde <0.05 g/kg (GB18583-2008);

d. Adhesive: dichloromethane <0.003 g/kg (GB18583-2008);

e. Adhesive: c,d-dichloroethane, c,c,d-trichloroethane, trichloroethylene total not detected (each halogenated hydrocarbon content less than 0.003 g/kg) (GB 18583-2008);

f. Adhesive: benzene <0.003 g/kg (HJ2541-2016);

g. Adhesive: toluene + ethylbenzene + xylene not detected (toluene, ethylbenzene, para-xylene, meta-xylene, ortho-xylene all less than 0.003 g/kg) (HJ2541-2016);

h. Adhesive: total volatile organic compounds ≤0.7 g/L (GB 33372-2020).

4. ▲Seat and back sponge use high-density polyester shaped sponge raw material, molded integrally by mold cold curing foaming, seat and back sponge correspond with tile-shaped seat and back outer panels, seat sponge thickness 140mm, thickest point of back sponge 120mm, physical indicators of sponge raw material meet and exceed GB/T10802-2006 "General Soft Polyether Polyurethane Foam", GB/T 6343-2009 "Determination of Apparent Density of Foam Plastics and Rubber", QB/T2280-2016 "Office Furniture Office Chairs", QB/T2602-2013 "Theater Public Seats" standards.

Sensory requirement testing items ≥6 items;

25% indentation hardness performance ≥205N;

65%/25% indentation ratio ≥2.1;

75% compression permanent deformation ≤3.2%;

Resilience rate ≥39.5%;

Tensile strength ≥122kPa;

Elongation rate ≥132%;

Tear strength ≥2.9N/cm;

Tensile strength after dry heat aging ≥102kPa;

Apparent density ≥66kg/m³;

Formaldehyde emission ≤0.022 mg/㎡·h.

5. The auditorium chair fabric is wool-linen woven fabric. The related indicators of the fabric meet and exceed GB18401-2010 "National Textile Product Basic Safety Technical Specification", GB 17927.1-2011 "Soft Furniture Mattress and Sofa Ignition Resistance Evaluation Part 1: Smoldering Cigarette" standard requirements:

a. Color: (optional);

b. Formaldehyde content Class C <300 mg/kg;

c. Decomposable carcinogenic aromatic amine dyes prohibited (limit value) <20 mg/kg;

d. Passed cigarette ignition resistance test requirements.

6. This procurement includes 798 red theater chairs, of which 582 chairs come with writing boards. Writing board: High-density multilayer board formed in one step by adhesive and high-frequency hot press machine, surface finished with high-quality PU environmentally friendly polyester paint, board surface shaped irregularly, edges sealed with PP plastic by one-time injection molding without seams, rounded edges on both sides of the board, with a 160mm long one-time injection molded pen groove on the front and back under the seat. Writing board specifications: 285*245*20mm (length and width ±5mm). GB 18580-2017 "Limit of formaldehyde emission from indoor decorative materials and artificial boards and their products" with moisture content ≤4%, bonding strength ≥1.35MPa, formaldehyde emission (climate chamber method) ≤0.025mg/m³, static bending strength along grain ≥42MPa, elastic modulus along grain ≥6200MPa.

7. This procurement includes 798 red theater chairs, of which 582 chairs come with writing boards. Writing board bracket: Uses a new type of direct welded connection part φ14mm solid cold-drawn round iron bracket and high-quality 3.0mm hot plate, processed by welding, grinding, degreasing and derusting, phosphating, high-temperature electrostatic spraying, etc., surface smooth and flat, compliant with HG/T 2006-2006 " Thermosetting powder coating " standard.

a: Hardness (scratch resistance) ≥2H;

b: Adhesion not less than grade 0.

After the writing board bracket and writing board are combined, they can bear a static pressure load of 100KG without deformation or fracture. After the writing board is opened from the armrest frame, the writing board and armrest surface can be adjusted to two angles of 9° and 27° according to personal needs.

8. ▲ Foot frame specifications: Standing foot height 210±2mm, length 385±2mm, width 100±2mm, wall thickness 7.5mm, net weight ≥2.5kg. The top of the foot is integrally formed aluminum alloy square with dimensions 180W*70D, wall thickness 7.5mm. To enhance the bearing capacity of the standing foot column and increase the three-dimensional lines of the foot frame, the column has 7 isosceles trapezoids inside, each layer with a gradient of 1.5mm, widest 245mm±3mm, narrowest 180±3mm. The base plate is fixed with two vertical holes front and back, hole spacing 315mm±3mm. Exceeds GB/T1173-2013 "Cast aluminum alloy", GB/T3325-2017 "General technical conditions for metal furniture", QB/T3827-1999 "Corrosion resistance test method for metal plating and chemical treatment layers of light industrial products - Acetate salt spray test (ASS) method", QB/T3832-1999 "Evaluation of corrosion test results of metal plating of light industrial products"; test content includes but is not limited to: chemical composition Mn ≤0.4, Si ≥10, Cu ≤0.12, Mg ≤0.06, Zn ≤0.08 (GB/T7999-2015); acetate salt spray 300h ≥ grade 10 (QB/T3827-1999).

Foot frame schematic diagram:

9. ▲ Auditorium chair metal hardware armrest foot frame material: Made of 2.0MM thick high-quality steel plate, formed by mold stamping, welding, grinding, length 430mm, height 410mm, compliant with QB/T2602-2013 "Public seats for cinemas and theaters", GB/T3325-2017 "General technical conditions for metal furniture", QB/T3826-1999 "Corrosion resistance test method for metal plating and chemical treatment layers of light industrial products - Neutral salt spray test (NSS) method".

a. Physical and chemical performance: paint film plastic coating adhesion ≥ grade 1;

b. Salt spray (NSS) test passed over 810h, with zero rust spots per 1dm² on the sample, corrosion resistance grade ≥10.

Components, upper and lower parts connected firmly by fasteners, armrest frame can be independently disassembled and replaced (no need to remove the floor screws of the foot frame, reducing damage to the floor).
10. Auditorium chair (desk row chair) armrest surface rubber wood raw material requirements: Made of high-quality rubber wood, surface coated with high-quality PU environmentally friendly polyester paint, smooth and bright. Complies with GB/T3324-2017 "General technical conditions for wooden furniture", GB/T29894-2013 "General methods for wood identification" standards, wood moisture content ≤10%.

11. Armrest frame decorative side panel: selected "Furen" high-quality E1 grade medium-density fiberboard fabric surface, thickness 3mm. Side panel decorative surface longest 420mm±5mm, shortest 245mm±5mm, widest 385mm±5mm.

12. Chair seat adopts new iron frame process (seat outer panel and seat sponge assembly use front side and rear side hidden type fixing, i.e., no screws on the front of the seat outer panel): selected high-quality steel plate thickness 1.5mm, formed by mold stamping and welding, with metal surface corrosion resistance to acetate salt spray for 18 continuous hours, test ≥ grade 10, better than QB/T2602-2013 "Public seats for cinemas and theaters", GB/T3325-2017 "General technical conditions for metal furniture", QB/T3827-1999 "Corrosion resistance test method for metal plating and chemical treatment layers of light industrial products - Acetate salt spray test (ASS) method", QB/T3832-1999 "Evaluation of corrosion test results of metal plating of light industrial products".

13. Auditorium chair corner bracket: selected high-quality T3.0mm stainless steel plate formed by mold one-time welding; requirements:

a. Product surface passed neutral salt spray test (NSS) 1200h, no rust found after 1200h neutral salt spray test;

b. Tensile strength Rm ≥652MPa;

c. Specified plastic extension strength Rp 0.2 ≥238MPa;

d. Low magnification structure, weld low magnification: no cracks or lack of fusion found in weld metal and heat-affected zone.

14. The chair seat rebound uses a damping rod silent return structure. The static load of the chair seat is 2000N, 760N, 10 times without loosening; seat impact height is 300mm, 10 times. No breakage or cracking occurs in chair components; no obvious deformation at loading parts; chair structure is stable without looseness, and the flip structure flips flexibly and smoothly. The product meets or exceeds the requirements of QB/T2602-2013 "Public Seats for Theaters and Cinemas."

15. ▲ Sturdy screws for seat fixation: high-quality self-tapping screws combined with hexagon socket M6, M8 plated or coated sturdy screws for fastening, meeting or exceeding GB/T 3325-2017 "General Technical Conditions for Metal Furniture," QB/T3832-1999 "Evaluation of Corrosion Test Results of Metal Coatings for Light Industry Products," and QB/T3826-1999 "Corrosion Resistance Test Methods for Metal Coatings and Chemical Treatment Layers of Light Industry Products - Neutral Salt Spray Test (NSS) Method."

Among them, corrosion resistance (tested by neutral salt spray test ( NSS method)) 1000 h coating's own corrosion resistance level is equal to or better than level 10, and 1000 h coating's protection level for the substrate is better than level 10.