Method for producing thin-walled articles from plastics

• US 3,928,704 A
• Filed: 06/24/1974
• Issued: 12/23/1975
• Est. Priority Date: 11/05/1971
• Status: Expired due to Term

• Current Assignee: Jan Kolarik, Jaroslav Hnidek, Jiri Zelinger, Slavko Hudecek, Viktor Heidingsfeld
• Original Assignee: Jan Kolarik, Jaroslav Hnidek, Jiri Zelinger, Slavko Hudecek, Viktor Heidingsfeld
• Inventors: Heidingsfeld, Viktor, Hudecek, Slavko, Hnidek, Jaroslav, Kolarik, Jan, Zelinger, Jiri
• Primary Examiner(s): Weinblatt, Mayer
• Application Number:
  US05/482,641
• Time in Patent Office: 547 Days
• Field of Search: 117/161UF,161UH,119.6 260/2.5P,2.5M,899 427/373,246 428/904,260,304,310
• US Class Current: 442/76
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 33/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: D06N 2205/08 Microballoons, microcapsules
• CPC Class Codes: D06N 3/0061 Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
• CPC Class Codes: Y10S 428/904 Artificial leather
• CPC Class Codes: Y10S 521/905 Hydrophilic or hydrophobic cellular product
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 442/2139 Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc.]
• CPC Class Codes: Y10T 442/2762 Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
• CPC Class Codes: Y10T 442/2861 Coated or impregnated synthetic organic fiber fabric

Abstract

Thin-walled articles produced from plastics applied to a fabric support or prepared without a fabric support by casting, coating or dipping, particularly plastic leathers with improved hygienic properties, such as permeability for air, water vapors and absorption of moisture. A hydrophilic filler or mixture of such fillers, together with a liquid or mixture of liquids which cause the filler to swell and which act as a physical blowing agent above their b.p. (60* - 140*C), are added to the processed material. The processed material may be based on poly(vinyl chloride), vinyl chloride copolymers or their mixtures, containing the usual plasticizers, stabilizers, lubricants, pigments and other additives. The filler is based upon synthetic cross-linked water-insoluble macromolecular compounds capable of reversibly binding water due to their polar groups, as for example, hydroxyl, amide, carboxyl, sulfohydroxyl or quaternary ammonium groups.

Claims

2. A thin walled plastic article comprising a laminate formed of at least one layer of fabric and at least one layer of an expanded jell composition formed of a uniform blend of an admixture of at least one hydrophilic filler based on a synthetic crosslinked water-insoluble macromolecular compound containing polar groups capable of binding water reversibly, at effective to swell said hydrophilic filler selected from the group of water and lower aliphatic alcohols, and a vinyl chloride plastisol type resin material selected from the group of polyvinylchloride, copolymers of vinyl chloride and mixtures thereof, wherein said liquid is used in an amount of at least 10% by weight referred to the hydrophilic filler.

3. The article according to claim 2 wherein said jell is set into a predetermined shape.

4. Method for making a thin-walled plastic article comprising admixing at least one hydrophilic filler based on a synthetic cross-linked water-insoluble macromolecular compound containing polar groups capable of binding water reversibly, at least one liquid boiling in the range of from 60* to 140*C and effective to swell said hydrophilic filler selected from the group of water and lower aliphatic alcohols, and a vinyl chloride plastisol type resin material selected from the group of polyvinylchloride, copolymers of vinyl chloride and mixtures thereof, wherein said liquid is used in an amount of at least 10% by weight compared to the hydrophilic filler, to form a uniform blend thereof, applying said blend onto at least one layer of fabric to form a laminate, heating said laminate to expand the material forming said blend and heating said laminate to cause jelling of said material forming said blend.

5. The method according to claim 4 which comprises carrying out said expansion by heating said laminate to a temperature of from 80* to 100*C.

6. The method according to claim 4 which comprises carrying out said jelling by heating said laminate to a temperature of from 170* to 190*C.

7. The method according to claim 4 wherein said hydrophilic filler is based on a synthetic cross-linked water insoluble macromolecular compound containing hydroxyl, amide, carboxyl or sulfohydroxyl groups in H , Na , Li , Ca , or Ba form or quaternary ammonium groups in OH , Cl or SO4H form.

8. The method according to claim 4 wherein said liquid is first mixed with said filler and the resulting mixture admixed with said vinylchloride plastisol resin material.

9. The method according to claim 4 wherein said hydrophilic filler is used in an amount of 5 to 50% by weight of the total of said blend.

10. The method according to claim 4 wherein said vinylchloride plastisol resin material additionally contains at least one member of the group of plasticizers, stabilizers, lubricants and pigments.

11. The method according to claim 4 wherein said liquid is a mixture of water and a lower aliphatic alcohol.

12. The method according to claim 4 wherein said liquid comprises an azEotropic mixture.