Description
[001]This invention introduces of two types of new plastic composites with three compositions each made of waste polypropylene, nylon 6, 6 (30% glass fibre) and acacia fibre.
[002]Here, the waste polypropylene is used as the parent material, with nylon 6, 6 (30% glass fibre) and acacia fibre used as reinforcements. The composites were fabricated through the injection moulding process. The first type of plastic is made of three compositions of waste polypropylene and nylon 6, 6 (30% glass fibre), with the nylon 6, 6 (30% glass fibre) added in quantities of 50 grams, 100 grams and 150 grams to waste polypropylene with weight of 950 grams, 900 grams and 850 grams respectively.
[003]Flexural, compression, hardness and impact tests were performed to check the mechanical behaviour of the composites fabricated. On adding 150 grams of nylon 6, 6 (30% glass fibre) to 850 grams of waste polypropylene, the observed Shore D hardness value was (68, 70, 68) with impact value of 2 kN, compressive strength of 2.53 kN and flexural strength of 0.43 kN.
[004]This composite, when compared to the waste polypropylene material with no reinforcements fabricated through injection moulding, which was used as a reference for comparison, showed 18.97% increase in its compressive strength and 37.20% increase in its flexural strength.
[005]The material made of only waste polypropylene through injection moulding had a compressive strength of 2.05kN, flexural strength of 0.27 kN, impact value of 4 kN and Shore D hardness value of (67, 66, 65). This supports the fact that the composite of comprising of 150 grams of nylon 6, 6 (30% glass fibre) to 850 grams of waste polypropylene increases the hardness, flexural and compressive strength of waste polypropylene.
[006]Hence this composite (850 grams of waste polypropylene + 150 grams of nylon 6, 6 (30% glass fibre) was found suitable for practical applications. The other compositions of waste polypropylene with nylon 6, 6 (30% glass fibre) reported lower values than the reference material made of only waste polypropylene.
[007]The second type of composite, made of waste polypropylene in quantities of 950 grams, 900 grams and 850 grams as the parent material, with acacia fibre

as the reinforcement added in quantities of 50 grams, 100 grams and 150 grams to waste polypropylene (in a similar fashion as that of the first type of composite), also showed decreased values in the tests performed.

CLAIMS
1. The composite {waste polypropylene + 150 grams nylon 6, 6 (30% glass filled) shows higher hardness than the original waste polypropylene moulding
2. The composite (waste polypropylene + 150 grams nylon 6, 6 {30% glass filled) shows higher compressive and flexural strength than the original waste polypropylene moulding.
3. The composite (waste polypropylene + 150 grams nylon 6, 6 {30% glass filled) shows lower impact strength.
4. The properties of The composite (waste polypropylene + 150 grams nylon 6, 6 {30% glass filled) is found to be useful in many practical applications.

5. The composites (waste polypropylene + 50 grams acacia fibre powder), (waste polypropylene + 100 grams acacia fibre powder), (waste polypropylene + 150 grams acacia fibre powder) show lower properties than the original waste polypropylene moulding.
6. The composites containing acacia powder are found to be unsuitable for practical applications.
7. The composites (waste polypropylene + 50 grams nylon 6, 6 (30% glass filled)), {waste polypropylene + 100 grams nylon 6, 6 (30% glass filled)) also show lower properties than the original waste polypropylene moulding.
8. We claim that the composites (waste polypropylene + 50 grams nylon 6, 6 (30% glass filled)), (waste polypropylene + 100 grams nylon 6, 6 (30% glass filled)) are unsuitable for practical applications.