Synthetic resins and their raw materials / A survey of the types and uses of synthetic resins, the organization of the industry, and the trade in resins and raw materials, with particular references to factors essential to tariff consideration. Under the general provisions of section 332, title III, part II, Tariff act of 1930.

by United States Tariff Commission

⁵ Shore.

⁶ 10 kg. load.

Note.—The values for the properties in this table are based upon maximum and minimum figures submitted to Modern Plastics by a number of manufacturers of each type of material. Differences in test procedures and sizes of test specimens may lead to erroneous conclusions in some cases if direct comparisons are attempted. Special grades of materials are often available which excel in one particular property.

Source: Modern Plastics, vol. 15, No. 2, opp. p. 120; October 1937.

Table 20.—Synthetic resins and other plastics: Heat properties

Type	Thermal conductivity	Specific heat	Thermal expansion	Resistance to continuous heat	Softening point	Distortion under heat	Tendency to cold flow
	10⁻⁴ calories per second per square centimeter per 1°C. per centimeter	Calories per °C. per gram	10⁻⁶ per °C.	°F.	°F.	°F.
Synthetic resins:
Tar-acid—Formaldehyde:
Molded, wood flour filler	4-12.2	0.35-0.36	3.7-7.5	350	None	240-285	None.
Molded, mineral filler	8-20	0.25-0.35	2.5-4	450	do.		Do.
Molded, fabric filler	3-5	0.30-0.35	2-6	250-350	do.		Do.
Laminated, paper base	5-8	0.3 -0.4	2	212-300	do.	320	Do.
Laminated, fabric base	5-8	0.3 -0.4	3	212-350	do.		Do.
Laminated, asbestos cloth base			2	400-500	do.		Do.
Cast	3-5	0.3-0.4	2.8	160
Tar-acid—Furfural:
Wood flour filler	3.5-5	0.3-0.4	3	280-400	Chars 450	268-288	Do.
Mineral filler	10-20	0.3-0.4	2	350-500	Chars 550	277-297	Do.
Fabric filler	5-8	0.3-0.4	4.5	280-350	Chars 400		Do.
Urea—Formaldehyde	7.13		1.5	160	None	260	Do.
Vinyl, unfilled	4	0.244	6.9		130-160	140-150	Slight.
Vinyl, filled	Varies	Varies	Varies		130-160	140-158	Do.
Acrylate	4.3-6.8	0.45	8.5		170-235	158	Do.
Styrol	1.9	0.324	10.2		110-200	185	Do.
Other plastics:
Shellac compound				150-190	150		Do.
Cold molded:
Nonrefractory				500
Refractory				1,300
Rubber compounds:
Chlorinated rubber					175-230	140	Do.
Modified isomerized rubber	2.6-2.9		7-8		165-220	167-221	Do.
Hard rubber	3.2	0.33	8.0		150-190		Do.
Casein			8			200
Cellulose compounds:
Ethyl cellulose						210-266
Cellulose acetate sheet	5.4-8.7	0.3-0.4	14-16	140-180	140-230	122-212	Do.
Cellulose acetate molding	5.4-8.7	0.3-0.45	14-16	140-180	145-260	122-212	Do.
Cellulose nitrate	3.1-5.1	0.34-0.38	12-16	ca. 140	160-195

Note.—The values for the properties in this table are based upon maximum and minimum figures submitted to Modern Plastics by a number of manufacturers of each type of material. Differences in test procedures and sizes of test specimens may lead to erroneous conclusions in some cases if direct comparisons are attempted. Special grades of material are often available which excel in one particular property.

Source: Modern Plastics, vol. 15, No. 2, opp. p. 120. October 1937.