CH628301A5 - Process for producing a plastic container for packaging goods such as foodstuffs, beverages, medicaments and cosmetics - Google Patents

Description

628 301

2nd

PATENT CLAIMS 8. The method of claim i, characterized in that an inner preform and an outer preform from one

1. Process for producing a plastic container for plastic, combines them and blows a container out of this packaging of goods, such as food, beverages, medicinal combination, the inner preform consisting of medium and cosmetics, characterized in that it consists of 5 units unused plastic and the outer preform consists of an inner layer of recycled plastic that comes into contact with the goods,

from a fresh resin and an outer layer from a 9th method according to / claim 8, characterized in that

Recycled resin is produced, both layers of which one is used as the plastic, which are made of the same resin material. has been made by polymerizing 100 parts by weight

2. The method according to claim 1, characterized in that 10 (A) at least 50% by weight of at least one nitrile with which the resin material is one has the structure CH2 = C-CN, wherein R is hydrogen, a lower alkyl -is made by polymerizing 100 parts by weight of |

(A) at least 50% by weight of at least one nitrile with the R

Structure CH2 = C-CN, where R is hydrogen, a lower alkyl group with 1 to 4 carbon atoms or a halogen 15 tet, and

R (B) up to 50% by weight, based on the total weight of a group with ibis 4 carbon atoms or a halogen meaning + "(B)> at least one representative from the group tet, and (1.) an ester with the structure CH2 = C - COOR ^ where Rt

(B) up to 50% by weight, based on the total weight of I (A) + (B), of at least one representative from group 20

(1.) an ester with the structure CH2 = C — COOR2, where R! Hydrogen, an alkyl group with 1 to 4 carbon atoms

| or a halogen and R, an alkyl group with 1 to 6 carbon atoms

Rj mean atomic atoms,

25 (2.) an a-olefin with the structure R ', where R' and hydrogen, an alkyl group with ibis 4 carbon atoms i or a halogen and R2 an alkyl group with ibis 6 carbons- CH> = C

atoms mean, r

(2.) an α-olefin with the structure R ', in which R' and R "

f 30 R "denotes alkyl groups with 1 to 7 carbon atoms,

CH2 = C (3.) of a vinyl ether selected from the group methylvi-

I. nyl ether, ethyl vinyl ether, the propyl vinyl ether and the butyl vi

R nyl ether,

R "denotes alkyl groups with 1 to 7 carbon atoms, vinyl acetate,

(3.) a vinyl ether selected from the group methylvi- 35 fö) inden ^

nyl ether, ethyl vinyl ether, the propyl vinyl ether and the butyl vi. ^ '' n en '... 1cn ^ ..

J .... ■> - J t-yj j m presence of 0 to 150 parts by weight of

(A \ V 'I (C) a rubber-like polymer of a conjugated f5ÌStrolund' diene monomer, selected from the group butadiene and f 6) Inde 40 IS0Pren. and, optionally, a comonomer selected in the presence of 0 to 150 parts by weight of from the Orappe styrofoam of a nitrous monomer having the structure

(C) a rubbery polymer of a conjugated CH2 = C-CN, in which R has the meanings given above, diene monomers selected from the group butadiene and ^

Isoprene, and optionally a comonomer. ^ t j r, 1, • xT-4.-l "j, Ct 11 .. and a monomer with the structure CH2 = C — COOR2 wherein from the group styrene, a nitnl monomer with the structure 45 z

CH2 = C — CN where R has the meanings given above I

"1 Ri

I R] and R2 have the meanings given above, where the

R. rubbery polymer 50 to 100 wt .-% polymerized and a monomer with the structure CH2 = C-COOR2 in which conjugated diene and 0 to 50 wt .-% of comonomer.

I 50 10. The method according to claim 9, characterized in

Ri that acrylonitrile is used as component (A).

Ri and R2 have the meanings given above, where the

rubbery polymer containing 50 to 100 wt .-% polymerized conjugated diene and 0 to 50 wt .-% comonomer.55 The invention relates to a process for producing one for

3. The method according to claim 2, characterized in that the packaging of goods and food, beverages,

component (A) is acrylonitrile. Drugs and cosmetics. Recycle plastic container

4. The method according to claim 2 or 3, characterized gekennzeich- rn't an inner layer of a fresh, d. H. Uncomfortable that component (B) needed methyl acrylate, FDA approved plastic and one. 60 outer layer of the same plastic material that

5. The method according to any one of claims 2 to 4, characterized in that recycle conditions (recovery conditions) are characterized in that it has been thrown at component (C).

Butadiene / acrylonitrile copolymer. Considerable efforts have been made to

6. The method according to any one of claims 1 to 5, thereby reusing plastic containers to cleanly labeled the environment that it has the shape of a bottle. 65 hold and save energy. There have been many

7. The method according to any one of claims 1 to 6, thereby made proposals to reuse plastic containers characterized in that the contact layer feed at least 0.025 mm dung and thereby the amount of solid waste that is thick. is formed by these materials, to diminish and

628 301

Reduce consumption of fossil fuels, especially petroleum, which are the raw material sources for most plastics. The reuse of used plastic containers can include the following stages: (1) burning the used plastic containers to utilize their calorific value, (2) crushing the used containers and using the shredded plastic for other purposes, e.g. as fillers for asphalt or concrete,

or deformation of the shredded material into shaped bodies, such as. B. drainage pipes, sewer pipes and the like., And (3) carefully sorting and cleaning the used containers, crushing and reusing the shredded material together with some fresh plastic (freshly made, not reused) for containers for food,

Drinks, pharmaceuticals and cosmetics. Although the above method (3) should appear to be the most appropriate way of reuse, it is doubtful whether the rejection and cleaning controls would be sufficient to ensure that this shredded plastic always complies with most of the FD A standards would apply to the fresh resin.

The aim of the invention is a method for producing a plastic container that complies with the standards of the FD A by using recycled plastic.

The inventive method is characterized by the features of claim 1. As a result, the FD A-approved, fresh resin with controlled purity is always the only one that comes into contact with the food, drink, drug, cosmetic or other product, and the less pure one, which is probably not approved by FD A Recycled plastic is on the outside of the container and can give it the physical strength and other properties required for the container. The fresh resin and the recycle resin in the containers according to the invention are the same material with the exception of the above-mentioned differences in terms of purity. It is thus possible to easily reuse plastic containers in new containers that are completely safe for use in packaging food, beverages, pharmaceuticals, cosmetics and other consumer products.

Although most thermoplastic resins are preferred in the present invention, such as. B. polyolefins, polyvinyl chloride, vinyl chloride copolymers, ABS, poly-carbonates, polyesters, polystyrenes, SAN resins and the newer nitrile barrier resins, the nitrile barrier resins are because of their excellent gas-tight properties, their excellent chemical resistance (resistance to chemicals ) and their very advantageous other properties are the most preferred resins.

The nitrile barrier layer resins are homopolymers and copolymers with a larger proportion of an olefinically unsaturated nitrile, optionally together with a smaller proportion of at least one other polymerisable component, a diene rubber possibly also being present. The most preferred nitrile barrier resins are those which are obtained by polymerizing 100 parts by weight of (A) at least 50% by weight of at least one nitrile of the structure CH2 = C — CN, where R is hydrogen, a lower alkyl group with

R

1 to 4 carbon atoms or a halogen, and (B) up to 50% by weight, based on the total weight of (A) + (B), of at least one member from group (1) of an ester having the structure CH2 = C — COOR2, where R] is hydrogen, a

Ri

Alkyl group having 1 to 4 carbon atoms or a halogen and R2 is an alkyl group having 1 to 6 carbon atoms, (2) an α-olefin having the structure R ', where R' and

I.

5 CH2 = C

I.

R "

R "denotes alkyl groups with 1 to 7 carbon atoms, (3) ig a vinyl ether selected from the group consisting of methyl vinyl ether, ethyl vinyl ether, the propyl vinyl ether and the butyl viyl ether, (4) vinyl acetate, (5) styrene and (6) indene, in the presence of 0 up to 150, preferably from 0 to 40 parts by weight of (C) a rubbery polymer of a conjugated diene monomer, selected from the group of butadiene and isoprene, and optionally a comonomer, selected from the group styrene, of a nitrile monomer having the structure CH2 = C-CN,

I ~

R

20 in which R has the meanings given above, and a monomer having the structure CHi = C — COOR2, in which R 1 and R 2

- 1

Ri

have the meanings given above, the 25 rubber-like polymer containing 50 to 100% by weight of polymerized conjugated diene and 0 to 50% by weight of comonomer.

There are various procedures for carrying out the process for producing the recycle containers, such as. B. The use of dual injection molding units for molding 30 a container, e.g. a bottle with a core made of fresh plastic and an outer layer made of recycled plastic. The finished container has the appearance of being made of a single material with no problems in terms of refractive index differences and the like. Another preferred and acceptable method is to insert a thermoformed tube of fresh plastic onto the die core pin, followed by molding the used plastic before blowing the assembled container (compound container). Two tubes of 40 different diameters can be formed and tubes cut from these tubes can be inserted into one another (with the tube made of the fresh plastic on the inside) and the composite can be blown to produce a bottle or the like. Numerous other methods 45 can be used in the manufacture of the recycle containers. The recycle containers are thus made of a single plastic material, and they are composite materials made of a fresh plastic on the inside (the surface that comes into contact with the product) and a re-used plastic on the outside, that with the product packed in it does not come into contact. The inner lining made of the fresh resin can be colorless or colored by any dye, and the outer recycle layer can be clear or the same or different color than the inner layer. For example, in the case of a plastic beer bottle, the inner lining can consist of a clear nitrile barrier resin and the outer layer of a brown colored recycled nitrile barrier resin. The overall appearance of the bottle is brown.

60 The subject matter of the invention is explained in more detail below with reference to the accompanying drawings, for example. Show:

Figure 1 is a perspective view of a recycle bottle, partially in section.

Fig. 2 is a side elevational view, partly in section, of the inner preform made of the new (unused) resin;

3 is a side elevation view, partially in section, of the outer preform made from the reused resin:

628 301 4

Fig. 4 is a side elevation, partly in section, of the invention, for example, a plant for the production of

Composite preform; Beer bottles made of nitrile barrier resin with various

Fig. 5 is a view of the bottle of Fig. 1 taken along the line held on fresh resin material to work out fluctuations

5-5; and to compensate for the availability of the recycle painter.

6 is a view of the bottle according to FIGS. 1 and 5 s since the containers have excellent solvent resistance.

along the line 6-6. speed, water resistance and low permeability for

Recycle bottle 1, which can consist of a combination of gases and vapors, are also very suitable for an inner preform 2 and a preform that can be reused in the packaging industry in the form of bottles, films,

Resin 3 used is produced either independently by foils, covers, boxes and the like, for the absorption of solids.

Mold tips or extrusion molds, as shown in Fig. 3, 10 fen and liquids.

or by injection molding or extrusion molding over the interior. The invention is illustrated by the following example.

ren preform 2, as shown in Fig. 4, forming a tert, but is not limited thereto. The one in it for the

Composite preform 4, which then refer to the amounts given in various additives in a suitable bottle shape,

is blown to the recycle bottle 1. The inner preform 2, unless otherwise stated, is by weight.

can be made from a fresh 15 -

Resin, by injection molding or extrusion molding of the new example 1

(unused) resin. Preferably _ A recycle bottle was made from a Barex®

the recycle bottle is manufactured in such a way that the final thickness 210 resin, an acrylonitrile / modified with nitrile rubber

the inflated preform 2 at its thinnest point in the methyl acrylate blend polymer described in the U.S. Patent

Bottle is at least 0.025 mm (1 mil), so that is ultimately described in more detail 20 3426102. An extruded film made of the material packed in the bottle, only the fresh resin-fresh resin with a thickness of 0.51 to 0.76 mm (20 to 30

is set. mils) was thermally formed in vacuum over a mandrel

In many cases it has already been proposed to produce plastic by using the smallest type to form an inner preform of the composite structures shown in FIG. 2. The inner preform was made on the core spigot of at least 2 different types of plastic materials. The injection blow molding device is set and an outer preform made of such composite materials creates, however, re-used Barex®210 resin was injection molded on the inner one with respect to a suitable bond, with respect to the preform to form a composite preform, extrusion viscosities and the like, which are disinfectant in the disclosed herein. 4 shown type. The composite material, homogeneous composite structures was not a problem. "then brought to a temperature of about 104 to about 121 ° C (220 to. The present invention can use a means 30 250 ° F) and inserted into a blow molding station and present it with high levels of recycled plastic without being a The biaxially oriented bottle of the one shown in Fig. 1 thereby influences the effectiveness of the container, whereby the type can be obtained , - Drinks, medicines and cosmetics ^ Resin and was suitable for being used with food and drinks.

2 sheets of drawings